Re: [Bug 207473] Re: Screen brightness double level changes on Dell laptops

[ethanay]

adding "acpi_backlight=vendor acpi_osi=linux" to grub boot options:
a. fully fixes this problem in a Dell Inspiron 1545 running 14.04 (all
behavior normal and as expected, including indicator popups for brightness
adjustment)
b. partially fixes the problem in a Dell Inspiron 1440 running 12.04 (full
access to all brightness levels via dedicated buttons, indicator pops up
but does not visually exhibit a brightness level change)

ethan

“A society grows great when its elders plant trees whose shade they know
they shall never sit in.” -- an ironic Greek proverb


On Sun, Aug 30, 2015 at 3:30 AM, Pavel Malyshev <207...@bugs.launchpad.net>
wrote:

> Just FYI:
> The bug, which Ubuntu cannot fix for 7 (SEVEN!!!) years, was fixed in
> Fedora in 1.5 months: https://bugzilla.redhat.com/show_bug.cgi?id=1141525
>
> ** Bug watch added: Red Hat Bugzilla #1141525
>https://bugzilla.redhat.com/show_bug.cgi?id=1141525
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/207473
>
> Title:
>   Screen brightness double level changes on Dell laptops
>
> Status in Linux:
>   Fix Released
> Status in hal package in Ubuntu:
>   Invalid
> Status in kde-guidance package in Ubuntu:
>   Fix Released
> Status in linux package in Ubuntu:
>   Fix Released
> Status in hal source package in Hardy:
>   Invalid
> Status in kde-guidance source package in Hardy:
>   Fix Released
> Status in linux source package in Hardy:
>   Invalid
>
> Bug description:
>   Binary package hint: gnome-power-manager
>
>   I have a fresh installation of Hardy with the latest updates installed
>   on a Dell Inspiron 6400 laptop. The brightness settings (Fn+Up/Down)
>   work although they seem to skip a level each time.
>
>   '/proc/acpi/video/VID/LCD/brightness' tells me that it supports
>   brightness levels 12, 24, 36, 48, 60, 72, 84 and 100. Without gnome-
>   power-manager running pressing Fn+Up will transition up into each
>   level and back down again smoothly.
>
>   When gnome-power-manager is running increasing the brightness from 12
>   I can only get levels 36, 60, 84 and 100. Decreasing the levels from
>   100 I only get 72, 48, 24 and 12. Running gnome-power-manager with the
>   verbose option shows that when I press the brightness-up button once
>   it is recorded twice. I ran gnome-power-manager in a debugger thinking
>   it was a timing issue and it still happened.
>
>   I have included the output from pressing the brightness-up button
>   (Fn+Up) once below. This only happens when gnome-power-manager is
>   running and did not happen using Feisty. I have looked at the code and
>   I cannot see why the button event is triggered twice, I don't have any
>   experience of the code but if you can give me any ideas of where to
>   start I can try to look into this myself.
>
>   Thanks!
>
>
>   [hal_device_condition_cb] gpm-button.c:391 (00:11:48):
>  condition=ButtonPressed, details=brightness-up
>   [emit_button_pressed] gpm-button.c:335 (00:11:48): emitting
> button-pressed : brightness-up
>   [button_pressed_cb] gpm-manager.c:999 (00:11:48):  Button press
> event type=brightness-up
>   [button_pressed_cb] gpm-srv-screensaver.c:167 (00:11:48):  Button
> press event type=brightness-up
>   [button_pressed_cb] gpm-backlight.c:563 (00:11:48):Button press
> event type=brightness-up
>   [gpm_brightness_lcd_get_hw] gpm-brightness-lcd.c:116 (00:11:48):
>  GetBrightness returned level: 0
>   [gpm_brightness_lcd_set_hw] gpm-brightness-lcd.c:155 (00:11:48):
>  Setting 1 of 7
>   [gpm_brightness_lcd_up] gpm-brightness-lcd.c:362 (00:11:48):   emitting
> brightness-changed (14)
>   [brightness_changed_cb] gpm-backlight.c:755 (00:11:48):Need to
> display backlight feedback value 14
>   [gpm_feedback_display_value] gpm-feedback-widget.c:144 (00:11:48):
>  Displaying 0.14 on feedback widget
>   [gpm_refcount_add] gpm-refcount.c:100 (00:11:48):  refcount now: 1
>   [gpm_refcount_add] gpm-refcount.c:101 (00:11:48):  non zero, so
> sending REFCOUNT_ADDED
>   [brightness_changed_cb] gpm-backlight.c:759 (00:11:48):emitting
> brightness-changed : 14
>   [button_pressed_cb] gpm-info.c:698 (00:11:48): Button press
> event type=brightness-up
>   [hal_device_condition_cb] gpm-button.c:391 (00:11:48):
>  condition=ButtonPressed, details=brightness-up
>   [emit_button_pressed] gpm-button.c:335 (00:11:48): emitting
> button-pressed : brightness-up
>   [button_pressed_cb] gpm-manager.c:999 (00:11:48):  Button press
> event type=brightness-up
>   [button_pressed_cb] gpm-srv-screensaver.c:167 (00:11:48):  Button
> press event type=brightness-up
>   [button_pressed_cb] gpm-backlight.c:563 (00:11:48):Button press
> event type=brightness-up
>   [gpm_brightness_lcd_get_hw] gpm-brightness-lcd.c:116 (00:11:48):
>  GetBrightness returned level: 1
>   [gpm_brightness_lcd_set_hw] gpm-brightness-lcd.c:155 (00:11:48):
>  Setting 2 of 7
>   

Re: [Bug 207473] Re: Screen brightness double level changes on Dell laptops

[ethanay]

The Fedora fix seems much more elegant and less invasive by simply finding
and eliminating a software keymapping duplicate of hardware/bios activated
keys, if it's the same issue!  Maybe it's part of the fix, because the
Inspiron 1545 running 14.04 already has those changes in its
/lib/udev/hwdb.d/60-keyboard.hwdb

# Dell Inspiron 1520
keyboard:dmi:bvn*:bvr*:bd*:svnDell*:pnInspiron*1520:pvr*
 KEYBOARD_KEY_85=unknown  # Brightness Down, also emitted by acpi-video,
ignore
 KEYBOARD_KEY_86=unknown  # Brightness Up, also emitted by acpi-video,
ignore

although perhaps we need to generalize this to more Dells and activate it
via the computer model identifier referenced in the Fedora bug?

ethan

“A society grows great when its elders plant trees whose shade they know
they shall never sit in.” -- an ironic Greek proverb


On Mon, Aug 31, 2015 at 2:07 PM, ethan a young  wrote:

> adding "acpi_backlight=vendor acpi_osi=linux" to grub boot options:
> a. fully fixes this problem in a Dell Inspiron 1545 running 14.04 (all
> behavior normal and as expected, including indicator popups for brightness
> adjustment)
> b. partially fixes the problem in a Dell Inspiron 1440 running 12.04 (full
> access to all brightness levels via dedicated buttons, indicator pops up
> but does not visually exhibit a brightness level change)
>
> ethan
>
> “A society grows great when its elders plant trees whose shade they know
> they shall never sit in.” -- an ironic Greek proverb
>
>
> On Sun, Aug 30, 2015 at 3:30 AM, Pavel Malyshev <207...@bugs.launchpad.net
> > wrote:
>
>> Just FYI:
>> The bug, which Ubuntu cannot fix for 7 (SEVEN!!!) years, was fixed in
>> Fedora in 1.5 months: https://bugzilla.redhat.com/show_bug.cgi?id=1141525
>>
>> ** Bug watch added: Red Hat Bugzilla #1141525
>>https://bugzilla.redhat.com/show_bug.cgi?id=1141525
>>
>> --
>> You received this bug notification because you are subscribed to the bug
>> report.
>> https://bugs.launchpad.net/bugs/207473
>>
>> Title:
>>   Screen brightness double level changes on Dell laptops
>>
>> Status in Linux:
>>   Fix Released
>> Status in hal package in Ubuntu:
>>   Invalid
>> Status in kde-guidance package in Ubuntu:
>>   Fix Released
>> Status in linux package in Ubuntu:
>>   Fix Released
>> Status in hal source package in Hardy:
>>   Invalid
>> Status in kde-guidance source package in Hardy:
>>   Fix Released
>> Status in linux source package in Hardy:
>>   Invalid
>>
>> Bug description:
>>   Binary package hint: gnome-power-manager
>>
>>   I have a fresh installation of Hardy with the latest updates installed
>>   on a Dell Inspiron 6400 laptop. The brightness settings (Fn+Up/Down)
>>   work although they seem to skip a level each time.
>>
>>   '/proc/acpi/video/VID/LCD/brightness' tells me that it supports
>>   brightness levels 12, 24, 36, 48, 60, 72, 84 and 100. Without gnome-
>>   power-manager running pressing Fn+Up will transition up into each
>>   level and back down again smoothly.
>>
>>   When gnome-power-manager is running increasing the brightness from 12
>>   I can only get levels 36, 60, 84 and 100. Decreasing the levels from
>>   100 I only get 72, 48, 24 and 12. Running gnome-power-manager with the
>>   verbose option shows that when I press the brightness-up button once
>>   it is recorded twice. I ran gnome-power-manager in a debugger thinking
>>   it was a timing issue and it still happened.
>>
>>   I have included the output from pressing the brightness-up button
>>   (Fn+Up) once below. This only happens when gnome-power-manager is
>>   running and did not happen using Feisty. I have looked at the code and
>>   I cannot see why the button event is triggered twice, I don't have any
>>   experience of the code but if you can give me any ideas of where to
>>   start I can try to look into this myself.
>>
>>   Thanks!
>>
>>
>>   [hal_device_condition_cb] gpm-button.c:391 (00:11:48):
>>  condition=ButtonPressed, details=brightness-up
>>   [emit_button_pressed] gpm-button.c:335 (00:11:48): emitting
>> button-pressed : brightness-up
>>   [button_pressed_cb] gpm-manager.c:999 (00:11:48):  Button press
>> event type=brightness-up
>>   [button_pressed_cb] gpm-srv-screensaver.c:167 (00:11:48):  Button
>> press event type=brightness-up
>>   [button_pressed_cb] gpm-backlight.c:563 (00:11:48):Button press
>> event type=brightness-up
>>   [gpm_brightness_lcd_get_hw] gpm-brightness-lcd.c:116 (00:11:48):
>>  GetBrightness returned level: 0
>>   [gpm_brightness_lcd_set_hw] gpm-brightness-lcd.c:155 (00:11:48):
>>  Setting 1 of 7
>>   [gpm_brightness_lcd_up] gpm-brightness-lcd.c:362 (00:11:48):   emitting
>> brightness-changed (14)
>>   [brightness_changed_cb] gpm-backlight.c:755 (00:11:48):Need to
>> display backlight feedback value 14
>>   [gpm_feedback_display_value] gpm-feedback-widget.c:144 (00:11:48):
>>  Displaying 0.14 on feedback widget
>>   [gpm_refcount_add] gpm-refcount.c:100 (00:11:48):  refcount now: 1
>>   

[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Pavel Malyshev]

Just FYI: 
The bug, which Ubuntu cannot fix for 7 (SEVEN!!!) years, was fixed in Fedora in 
1.5 months: https://bugzilla.redhat.com/show_bug.cgi?id=1141525

** Bug watch added: Red Hat Bugzilla #1141525
   https://bugzilla.redhat.com/show_bug.cgi?id=1141525

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  Screen brightness double level changes on Dell laptops

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[ethanay]

Is this a HAL problem?  It's still a problem in 14.04 LTS...

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  Screen brightness double level changes on Dell laptops

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Julian Wiedmann]

This release has reached end-of-life [0].

[0] https://wiki.ubuntu.com/Releases

** Changed in: linux (Ubuntu Hardy)
   Status: Confirmed = Invalid

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Pavel Malyshev]

Are you serios? This bug is confirmed in 12.04 and 13.04. It can't be
invalid!

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  Screen brightness double level changes on Dell laptops

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Pavel Malyshev]

Ubuntu 12.10.. The bug is still here.

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Re: [Bug 207473] Re: Screen brightness double level changes on Dell laptops

[ethanay]

ditto on a Dell Inspiron 1440 -- still here.  no workarounds that i know
of

Dell XPS m1330 -- adding acpi_backlight=vendor to grub boot parameters
resolves the issue

ethan

On Mon, Nov 5, 2012 at 8:55 AM, Pavel Malyshev
207...@bugs.launchpad.netwrote:

 Ubuntu 12.10.. The bug is still here.

 --
 You received this bug notification because you are subscribed to the bug
 report.
 https://bugs.launchpad.net/bugs/207473

 Title:
   Screen brightness double level changes on Dell laptops

 Status in The Linux Kernel:
   Fix Released
 Status in “hal” package in Ubuntu:
   Invalid
 Status in “kde-guidance” package in Ubuntu:
   Fix Released
 Status in “linux” package in Ubuntu:
   Fix Released
 Status in “hal” source package in Hardy:
   Invalid
 Status in “kde-guidance” source package in Hardy:
   Fix Released
 Status in “linux” source package in Hardy:
   Confirmed

 Bug description:
   Binary package hint: gnome-power-manager

   I have a fresh installation of Hardy with the latest updates installed
   on a Dell Inspiron 6400 laptop. The brightness settings (Fn+Up/Down)
   work although they seem to skip a level each time.

   '/proc/acpi/video/VID/LCD/brightness' tells me that it supports
   brightness levels 12, 24, 36, 48, 60, 72, 84 and 100. Without gnome-
   power-manager running pressing Fn+Up will transition up into each
   level and back down again smoothly.

   When gnome-power-manager is running increasing the brightness from 12
   I can only get levels 36, 60, 84 and 100. Decreasing the levels from
   100 I only get 72, 48, 24 and 12. Running gnome-power-manager with the
   verbose option shows that when I press the brightness-up button once
   it is recorded twice. I ran gnome-power-manager in a debugger thinking
   it was a timing issue and it still happened.

   I have included the output from pressing the brightness-up button
   (Fn+Up) once below. This only happens when gnome-power-manager is
   running and did not happen using Feisty. I have looked at the code and
   I cannot see why the button event is triggered twice, I don't have any
   experience of the code but if you can give me any ideas of where to
   start I can try to look into this myself.

   Thanks!


   [hal_device_condition_cb] gpm-button.c:391 (00:11:48):
 condition=ButtonPressed, details=brightness-up
   [emit_button_pressed] gpm-button.c:335 (00:11:48): emitting
 button-pressed : brightness-up
   [button_pressed_cb] gpm-manager.c:999 (00:11:48):  Button press
 event type=brightness-up
   [button_pressed_cb] gpm-srv-screensaver.c:167 (00:11:48):  Button
 press event type=brightness-up
   [button_pressed_cb] gpm-backlight.c:563 (00:11:48):Button press
 event type=brightness-up
   [gpm_brightness_lcd_get_hw] gpm-brightness-lcd.c:116 (00:11:48):
 GetBrightness returned level: 0
   [gpm_brightness_lcd_set_hw] gpm-brightness-lcd.c:155 (00:11:48):
 Setting 1 of 7
   [gpm_brightness_lcd_up] gpm-brightness-lcd.c:362 (00:11:48):   emitting
 brightness-changed (14)
   [brightness_changed_cb] gpm-backlight.c:755 (00:11:48):Need to
 display backlight feedback value 14
   [gpm_feedback_display_value] gpm-feedback-widget.c:144 (00:11:48):
 Displaying 0.14 on feedback widget
   [gpm_refcount_add] gpm-refcount.c:100 (00:11:48):  refcount now: 1
   [gpm_refcount_add] gpm-refcount.c:101 (00:11:48):  non zero, so
 sending REFCOUNT_ADDED
   [brightness_changed_cb] gpm-backlight.c:759 (00:11:48):emitting
 brightness-changed : 14
   [button_pressed_cb] gpm-info.c:698 (00:11:48): Button press
 event type=brightness-up
   [hal_device_condition_cb] gpm-button.c:391 (00:11:48):
 condition=ButtonPressed, details=brightness-up
   [emit_button_pressed] gpm-button.c:335 (00:11:48): emitting
 button-pressed : brightness-up
   [button_pressed_cb] gpm-manager.c:999 (00:11:48):  Button press
 event type=brightness-up
   [button_pressed_cb] gpm-srv-screensaver.c:167 (00:11:48):  Button
 press event type=brightness-up
   [button_pressed_cb] gpm-backlight.c:563 (00:11:48):Button press
 event type=brightness-up
   [gpm_brightness_lcd_get_hw] gpm-brightness-lcd.c:116 (00:11:48):
 GetBrightness returned level: 1
   [gpm_brightness_lcd_set_hw] gpm-brightness-lcd.c:155 (00:11:48):
 Setting 2 of 7
   [gpm_brightness_lcd_up] gpm-brightness-lcd.c:362 (00:11:48):   emitting
 brightness-changed (28)
   [brightness_changed_cb] gpm-backlight.c:755 (00:11:48):Need to
 display backlight feedback value 28
   [gpm_feedback_display_value] gpm-feedback-widget.c:144 (00:11:48):
 Displaying 0.28 on feedback widget
   [gpm_refcount_add] gpm-refcount.c:100 (00:11:48):  refcount now: 2
   [gpm_refcount_add] gpm-refcount.c:101 (00:11:48):  non zero, so
 sending REFCOUNT_ADDED
   [brightness_changed_cb] gpm-backlight.c:759 (00:11:48):emitting
 brightness-changed : 28
   [button_pressed_cb] gpm-info.c:698 (00:11:48): Button press
 event type=brightness-up
   

[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Adam Porter]

I think it's not just the brightness, either.  It seems to be the
multimedia keys as well.  Just trying to pause the music player with
the pause button on my Dell XPS M1330 is very difficult, because
pressing the pause button sends it twice, so the music pauses and
instantly unpauses.  If I tap it a bunch of times, I eventually get
lucky and end up with an uneven number of keypresses received.  The
same happens with next/previous and volume buttons (e.g. mute works
the same as pause).

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[afunix]

Adam, I think you issue with pause/next/prev buttons is something
different. Because everyone in this thread has problem with brightness
and noone reported problem with these keys. Actually, I have doblue-
brightness issue on my Dell Inspiron 1520 (with 12.04 beta 2!! will it
ever be fixed?!) and pause/prev/next buttons work just fine.

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  Screen brightness double level changes on Dell laptops

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Mtt.Castelli]

Confirmed here, since a lot a Ubuntu release, now:

Ubuntu 11.10 64-bit, kernel Linux 3.2.13 on Dell XPS M1330 Intel graphic
x3100. This behaviour occur both with main graphics driver than with the
onces included in this PPA https://launchpad.net/~oibaf/+archive
/graphics-drivers

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  Screen brightness double level changes on Dell laptops

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Daniel Ansari]

The bug report is titled too narrowly, as the problem obviously
encompasses multiple hardware platforms.  This should be a clue for the
developers.

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Re: [Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Steve Langasek]

On Fri, Mar 23, 2012 at 10:54:31AM -, Daniel Ansari wrote:
 The bug report is titled too narrowly

No, because if you're seeing such a symptom on different hardware, it is an
*unrelated bug* and you should file a new bug report.

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Dmikam]

I have seen Lenovo bug notify here too... I don't think it is related
with vendor Dell...

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Dmikam]

The same problem. 4 events. The brightnes in/decrased by 2 steps:
Ubuntu 11.10 Unity
Ubuntu 11.10 Gnome-shell

$ cat /sys/class/dmi/id/sys_vendor
Hewlett-Packard
$ cat /sys/class/dmi/id/product_name
HP Pavilion dm4 Notebook PC

$ sudo killall gnome-settings-daemon
$ /etc/init.d/acpid stop
$ /etc/init.d/hal stop (No such file or directory)

$ sudo /lib/udev/keymap -i input/eventX
.
# single decrease brightness button pressed
got scan code event 0xAB without a key code event
got scan code event 0xAB without a key code event
.
# single increase brightness button pressed (YES !!! the same key-code)
got scan code event 0xAB without a key code event
got scan code event 0xAB without a key code event
.

$ xev | sed -n 's/^.*state \([0-9].*\), keycode *\([0-9]\+\) *\(.*\), 
.*$/keycode \2 = \3, state = \1/p'
...
# single decrease brightness button pressed
keycode 232 = (keysym 0x1008ff03, XF86MonBrightnessDown), state = 0x0
keycode 232 = (keysym 0x1008ff03, XF86MonBrightnessDown), state = 0x0
keycode 232 = (keysym 0x1008ff03, XF86MonBrightnessDown), state = 0x0
keycode 232 = (keysym 0x1008ff03, XF86MonBrightnessDown), state = 0x0
# single increase brightness button pressed
keycode 233 = (keysym 0x1008ff02, XF86MonBrightnessUp), state = 0x0
keycode 233 = (keysym 0x1008ff02, XF86MonBrightnessUp), state = 0x0
keycode 233 = (keysym 0x1008ff02, XF86MonBrightnessUp), state = 0x0
keycode 233 = (keysym 0x1008ff02, XF86MonBrightnessUp), state = 0x0

I think that's all...

Binding these commands to other hotkeys helps me not critical but 
xbacklight -inc 10
xbacklight -dec 10

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  Screen brightness double level changes on Dell laptops

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Dmikam]

One more thing respectively to my previous comment:

$ acpi_listen 
# single brightness down button pressed (Fn+F2)
video DD02 0087 
video DD02 0087 
# single brightness up button pressed (Fn+F3)
video DD02 0086 
video DD02 0086 

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Steve Langasek]

 $ cat /sys/class/dmi/id/product_name
 HP Pavilion dm4 Notebook PC

This bug report is about Dell laptops.  Please open a separate bug
report for your issue.

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Daniel Ansari]

I was using Ubuntu 11.10 (32 bit) on a ThinkPad W510, and having this
problem.  Fn+Down decreased brightness by 2 steps, and Fn+Up increased
it by 3 steps.

I just changed my installation to Xubuntu 11.10 64 bit, and am having
the same issue, thus it's not specific to Gnome nor KDE.  I don't have
HAL installed.  The two commands below have no effect:

/etc/init.d/acpid stop
/etc/init.d/hal stop (No such file or directory)

The temporary workaround is described in the comment by Kuba Górski.  I
can also overwrite the brightness file to set the desired level (0-15).

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Karolis]

I have this bug ever since I first started using Ubuntu - please don't
take it away...

OK, in all seriousness, this is not a workaround, but I find it useful
https://launchpad.net/~indicator-brightness/+archive/ppa

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[P Liu]

I'm using ubuntu, lubuntu, and kubuntu 11.10 and thinkpad T520. Pressing
brightness-up/down changes brightness by 3 steps.

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[afunix]

No. This bug can be found in kde and gnome. It looks like hal-related bug. You 
can switch to console (Alt-Ctrl-F1) and change brightness by one step. 
This behavoir is known since April 2008...

And I can confirm that pressing brightness-up/down changes brightness by
3 steps.

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Andreas Peer]

I'm also still experiencing this bug in 11.10, although now the brightness 
level changes by 3 steps instead of 2 when pressing the brighntess-up/down key 
once.
It's interesting that this happens just after login in. On the login screen 
(LightDM) it's working fine, so maybe it's still a gnome-related bug?

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[afunix]

Yeah! Cool!
It is a three-year-old bug and I can still reproduce it in Ubuntu 11.10!

Let's leave this bug for the third LTS! I will miss this one if someday
it will be fixed!

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Birchle]

I'm also having this problem on a Dell Latitude E6410 with Ubuntu 11.04,
using the Classic (no effects) desktop.

A new (I think) detail, though:
If I have a menu open in the panel, any menu (applications, places, system, 
volume, time/date, etc), and try changing the brightness with it open, it only 
changes by one level.  As soon as I leave the menu, it goes back to changing 
two levels back to back, for one button-press.

lshal -m gives me The program 'lshal' is currently not installed.  You
can install it by typing: sudo apt-get install hal

Is there anything else I should try and post the results?

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Bzzz]

Similar problem on my ThinkPad T400, but with steps of two or three. 
cat /sys/devices/virtual/backlight/acpi_video0/actual_brightness goes 0 - 2 - 
5 - 8 - 11 - 14 - 15 (max), down: - 13 - 11 - 8 - 6 - 3 - 0. Manual 
setting of each single step via panel is possible.
I haven't had this on maverick, if that is any help. 

lshal -m does not generate any output.

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[afunix]

Is three years is not enough to fix this bug?
There were seven releases! 
hardy [LTS]. intrepid. jaunty. karmic. lucid [LTS]. maverick. natty.

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[afunix]

I can confirm this bug on Dell Inspiron 1520 and fresh Ubuntu Natty

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Svetoslav Popov]

I have similar problem on my HP 6715s. I think bios controls the brightness, 
and when I change the brightness, it goes 2 steps.
Ubuntu 11.04 x64

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Owen Williams]

I still have this problem in Natty.  If I kill gnome-power-manager and
acpid, I can still change the brightness (I get all 8 steps that way).
But I get no output at all with either lshal -m or sudo /lib/udev/keymap
-i input/event4 and  sudo /lib/udev/keymap -i input/event5 in this mode.
Is the brightness being changed by the bios?

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Bug Watch Updater]

** Changed in: linux
   Importance: Unknown = Medium

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Sense Hofstede]

Does this issue still exist in Hardy Heron?

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[hate_bugs_89]

Okay, so... where is the fix?
I'm a complete Linux newbie, but I'm raging right now because everything is so 
fricking hard to find out about. Yes, I am smashing my head and my fists 
against a brick wall right now. :)

I should have just downgraded to 7.10 right now, but then I wouldn't be
able to activate my graphics card drivers, because they stop supporting
the current Linux distrubation after two days.

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Jeremy Foshee]

verified the commit in Lucid. Marked Fix Released. Declined nomination
for Intrepid.

-JFo

** Changed in: linux (Ubuntu)
   Status: Triaged = Fix Released

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Ubuntu QA Website]

** Tags added: iso-testing

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Steve Langasek]

Thanks.  Please run each of the following commands, and confirm that you
see output with each when pressing the brightness-up key:

  sudo /lib/udev/keymap -i input/event4
  sudo /lib/udev/keymap -i input/event5

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Re: [Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Mikael Gerdin]

I get this:

rev...@sovereign:~$ sudo /lib/udev/keymap -i input/event4   

Press ESC to finish
scan code: 0x86   key code: brightnessup   
scan code: 0x85   key code: brightnessdown 
scan code: 0x86   key code: brightnessup   
scan code: 0x85   key code: brightnessdown 
scan code: 0x01   key code: esc
rev...@sovereign:~$ sudo /lib/udev/keymap -i input/event5
Press ESC to finish
scan code: 0x00   key code: brightnessup   
scan code: 0x00   key code: brightnessdown 
scan code: 0x00   key code: brightnessup   
scan code: 0x00   key code: brightnessdown

On Tuesday 03 November 2009 10.27.20 Steve Langasek wrote:
 Thanks.  Please run each of the following commands, and confirm that you
 see output with each when pressing the brightness-up key:
 
   sudo /lib/udev/keymap -i input/event4
   sudo /lib/udev/keymap -i input/event5


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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[afunix]

Single brightness-up press gives single event:
$ sudo /lib/udev/keymap -i input/event4
Press ESC to finish
scan code: 0x86   key code: brightnessup
scan code: 0x01   key code: esc
$ sudo /lib/udev/keymap -i input/event5
Press ESC to finish
scan code: 0x00   key code: brightnessup

/lib/udev/keymap does not detect pressed ESC with event5.

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[ethanay]

i am running a fresh install of 9.10 on a Dell XPS M1330 laptop

getting two events per each keypress:

11:07:03.785: platform_i8042_i8042_KBD_port_logicaldev_input condition 
ButtonPressed = brightness-up
11:07:03.799: computer_logicaldev_input condition ButtonPressed = brightness-up

11:07:05.477: computer_logicaldev_input condition ButtonPressed = 
brightness-down
11:07:05.477: platform_i8042_i8042_KBD_port_logicaldev_input condition 
ButtonPressed = brightness-down

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Steve Langasek]

xev output looks normal (one down, one up event for each keypress).  The
output of acpi_listen doesn't show any events that acpid/acpi-support
react to by default.

Please try stopping acpid (sudo service stop acpid) and test again, and
see whether this makes any difference (I don't expect that it will).

Please also attach the output of 'lshal'.

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[afunix]

You were right, after sudo service acpid stop nothing changed.

** Attachment added: lshal.txt
   http://launchpadlibrarian.net/35006997/lshal.txt

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Mikael Gerdin]

Afunix: I found a work-around to this problem.
Open up Global Keyboard Shortcuts in system settings and select KDE Daemon 
in the 
KDE  Component drop-down.
There you should see the Decrease/Increase screen brightness, I just set both to
custom: none and after that I only got one brightness-change for each keypress, 
however I still get two events in `lshal -m` and in xev.
I can live without a progress bar telling me how bright my screen is, after all 
I'm looking at it.

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[afunix]

Yes. It works.
So, does acpid set brightness?
How should both systems (acpi and kde) work together?

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Steve Langasek]

Why do you think this is the same bug when this bug report has been
marked as fixed since Ubuntu 8.10?

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[afunix]

Look at lshal's output in beginning of the thread, and in my previos message.
They are the same!

- 2008-03-27:  -
$ lshal -m
Start monitoring devicelist:
 -
 12:55:17.525: platform_i8042_i8042_KBD_port_logicaldev_input condition 
ButtonPressed = brightness-up
 12:55:17.525: computer_logicaldev_input condition ButtonPressed = brightness-up
 12:55:18.012: computer_power_supply_battery_BAT0 property 
battery.voltage.current = 12542 (0x30fe)
 12:55:18.738: platform_i8042_i8042_KBD_port_logicaldev_input condition 
ButtonPressed = brightness-down
 12:55:18.754: computer_logicaldev_input condition ButtonPressed = 
brightness-down

-- 2009-10-30 -
$ lshal -m
Start monitoring devicelist:
 -
 08:27:42.662: platform_i8042_i8042_KBD_port_logicaldev_input condition 
ButtonPressed = brightness-up
 08:27:42.676: computer_logicaldev_input condition ButtonPressed = brightness-up
 08:27:44.339: platform_i8042_i8042_KBD_port_logicaldev_input condition 
ButtonPressed = brightness-down
 08:27:44.352: computer_logicaldev_input condition ButtonPressed = 
brightness-down
 08:27:46.348: platform_i8042_i8042_KBD_port_logicaldev_input condition 
ButtonPressed = brightness-up
 08:27:46.348: computer_logicaldev_input condition ButtonPressed = brightness-up

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Steve Langasek]

Reopening the linux task, then.  afunix, please look at
https://wiki.ubuntu.com/Hotkeys/Troubleshooting to help is figure out
why you're getting two events instead of one.

** Changed in: linux (Ubuntu)
   Status: Fix Released = Confirmed

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[afunix]

$ xev | sed -n 's/^.*state \([0-9].*\), keycode *\([0-9]\+\) *\(.*\), 
.*$/keycode \2 = \3, state = \1/p'
keycode 36 = (keysym 0xff0d, Return), state = 0x0
keycode 233 = (keysym 0x1008ff02, XF86MonBrightnessUp), state = 0x0
keycode 233 = (keysym 0x1008ff02, XF86MonBrightnessUp), state = 0x0
keycode 232 = (keysym 0x1008ff03, XF86MonBrightnessDown), state = 0x0
keycode 232 = (keysym 0x1008ff03, XF86MonBrightnessDown), state = 0x0


** Attachment added: dmesg.log
   http://launchpadlibrarian.net/34715326/dmesg.log

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[afunix]

** Attachment added: lsinput.log
   http://launchpadlibrarian.net/34715531/lsinput.log

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[afunix]

xkbmap.txt

xkb_keymap {
xkb_keycodes  { include evdev+aliases(qwerty) };
xkb_types { include complete  };
xkb_compat{ include complete+ledscroll(group_lock)};
xkb_symbols   { include 
pc+us+ru:2+inet(evdev)+group(ctrl_shift_toggle)+level3(ralt_switch)   };
xkb_geometry  { include pc(pc105) };
};


** Attachment added: xkbcomp.txt
   http://launchpadlibrarian.net/34715414/xkbcomp.txt

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[afunix]

** Attachment added: udev-db.txt
   http://launchpadlibrarian.net/34715620/udev-db.txt

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[afunix]

I'm using kubuntu, so I can't apply gnome-*/gconf* instructions

ACPI says:

$ acpi_listen
video LCD 0086 
video LCD 0087 

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[afunix]

And I can change brightness normally in console and echoing to
/sys/class/backlight/.../brightness

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[afunix]

OMG, fresh karmic kubuntu clean install on Dell Inspiron 1520, and bug is still 
here:
$ lshal -m

Start monitoring devicelist:
-
08:27:42.662: platform_i8042_i8042_KBD_port_logicaldev_input condition 
ButtonPressed = brightness-up
08:27:42.676: computer_logicaldev_input condition ButtonPressed = brightness-up
08:27:44.339: platform_i8042_i8042_KBD_port_logicaldev_input condition 
ButtonPressed = brightness-down
08:27:44.352: computer_logicaldev_input condition ButtonPressed = 
brightness-down
08:27:46.348: platform_i8042_i8042_KBD_port_logicaldev_input condition 
ButtonPressed = brightness-up
08:27:46.348: computer_logicaldev_input condition ButtonPressed = brightness-up

There were single brightness-up and single brightness-down pressed.
The bug is 1.5 years old. Is it going to be fixed someday?

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Launchpad Bug Tracker]

** Branch linked: lp:ubuntu/hardy-proposed/kde-guidance

** Branch linked: lp:ubuntu/intrepid/kde-guidance

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Steve Langasek]

Amir,

The new notification system has no bearing on how hotkeys are handled.
If you're seeing a hotkey having the wrong effect, please follow the
troubleshooting guide at https://wiki.ubuntu.com/Hotkeys/Troubleshooting
to determine where in the system the second hotkey is going wrong, and
file a new bug on the corresponding package.

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Re: [Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Amir Khosroshahi]

Thanks Steve,

After I looked more deeply into the problem, I found that the problem is not
with brightness level changes -- it changes correctly when I press
Fn+Up/Down keys.

The problem is that there are 6 brightness levels (as reported in
'/proc/acpi/video/VID/LCD/brightness'), which are 12, 24, 36, 48, 60, 72, 84
and 100, whereas the brightness pop-up (of the new notification system)
shows 7 levels; That's why it seems to get confused when showing the
brightness levels while the brightness is changing correctly. For example,
when LCD brightness is at level 0 (lowest), it still shows the brightness at
level 1.

I don't know exactly which package I should submit this bug against. Could
you help? And sorry if I disscussed the isse in the wrong place.

On Sat, May 9, 2009 at 1:09 PM, Steve Langasek steve.langa...@canonical.com
 wrote:

 Amir,

 The new notification system has no bearing on how hotkeys are handled.
 If you're seeing a hotkey having the wrong effect, please follow the
 troubleshooting guide at https://wiki.ubuntu.com/Hotkeys/Troubleshooting
 to determine where in the system the second hotkey is going wrong, and
 file a new bug on the corresponding package.

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Re: [Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Amir Khosroshahi]

I made a mistake. There 8 levels of brightness reported, and the brightness
pop-up also shows 8 levels correctly.
The problem is that one level is sometimes jumped over randomly. I'll read
the link you sent more carefully again and try find the source of the
problem.

Thanks.

On Sat, May 9, 2009 at 2:20 PM, Amir Reza Khosroshahi 
amir.khosrosh...@gmail.com wrote:

 Thanks Steve,

 After I looked more deeply into the problem, I found that the problem is
 not with brightness level changes -- it changes correctly when I press
 Fn+Up/Down keys.

 The problem is that there are 6 brightness levels (as reported in
 '/proc/acpi/video/VID/LCD/brightness'), which are 12, 24, 36, 48, 60, 72, 84
 and 100, whereas the brightness pop-up (of the new notification system)
 shows 7 levels; That's why it seems to get confused when showing the
 brightness levels while the brightness is changing correctly. For example,
 when LCD brightness is at level 0 (lowest), it still shows the brightness at
 level 1.

 I don't know exactly which package I should submit this bug against. Could
 you help? And sorry if I disscussed the isse in the wrong place.


 On Sat, May 9, 2009 at 1:09 PM, Steve Langasek 
 steve.langa...@canonical.com wrote:

 Amir,

 The new notification system has no bearing on how hotkeys are handled.
 If you're seeing a hotkey having the wrong effect, please follow the
 troubleshooting guide at https://wiki.ubuntu.com/Hotkeys/Troubleshooting
 to determine where in the system the second hotkey is going wrong, and
 file a new bug on the corresponding package.

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Guido Conaldi]

Can somone confirm that the bug is fixed on Dell m1330 with intel
graphics?

I have such a model and I keep seeing double changes in brightness when
I press FN+Up or Down and g-p-m is running. Also using latest intel
drivers did not help. Using the .30 mainline kernel does give one-step
increments, however the scale of the slider gets much bigger than eight
steps as it should be on this model.

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Re: [Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Amir Khosroshahi]

I can confirm that this is fixed in my Dell Inspiron 6400.

But a new problem is introduced: when pressing Ctrl+Fn Down immediately
after Ctrl+Fn Up (or vise versa), the brightness continues to go up, as if
it has an inertia. Of course, this may be a bug with Jaunty's new
notification system.

On Fri, Apr 24, 2009 at 5:07 AM, Steve Langasek 
steve.langa...@canonical.com wrote:

 Sounds like this can be considered fixed on the Dell laptops now, for
 jaunty and beyond.

 Users of non-Dell laptops who are experiencing similar symptoms should
 file separate bug reports (preferably, after checking whether the
 problem still affects them with Ubuntu 9.04).

 ** Changed in: linux (Ubuntu)
   Status: Confirmed = Fix Released

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Re: [Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Michael Rooney]

On Fri, May 8, 2009 at 7:58 AM, Guido Conaldi guido.cona...@poste.it wrote:
 Can somone confirm that the bug is fixed on Dell m1330 with intel
 graphics?

For clarity, my aforementioned resolution was on an XPS 1300 with
nvidia, not intel.

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[Bug 207473] Re: Screen brightness double level changes

[Vegar]

Appears to be fixed for me on my T61 (nvidia quadro nvs 140m) with
32-bit Jaunty final

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Re: [Bug 207473] Re: Screen brightness double level changes

[Michael Rooney]

Yes, Jaunty has fixed this issue on my Dell XPS M1330 as well.

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Steve Langasek]

** Summary changed:

- Screen brightness double level changes
+ Screen brightness double level changes on Dell laptops

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[Bug 207473] Re: Screen brightness double level changes on Dell laptops

[Steve Langasek]

Sounds like this can be considered fixed on the Dell laptops now, for
jaunty and beyond.

Users of non-Dell laptops who are experiencing similar symptoms should
file separate bug reports (preferably, after checking whether the
problem still affects them with Ubuntu 9.04).

** Changed in: linux (Ubuntu)
   Status: Confirmed = Fix Released

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[Bug 207473] Re: Screen brightness double level changes

[Guido Conaldi]

Unfortunately I can confirm that on my xps m1330 with intel x3100 and
jaunty 64bit up-to-date the problem still occurs.

The behaviour has changed, however: before Jaunty the levels I could
cycle through where always 4. Now it varies, sometimes 4, sometimes 5,
others 6.

As usual, stopping g-p-m makes the FN+Up/Down work fine: 8 brightness
levels to choose from.

Any hope to see this bug really fixed?

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[Bug 207473] Re: Screen brightness double level changes

[Mike Basinger]

I don't see this bug in Jaunty Alpha 6. Fixed maybe.

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Re: [Bug 207473] Re: Screen brightness double level changes

[Michael Rooney]

I can confirm what Mike B. said, I haven't experienced this on my XPS
M1330 since a fresh install of Alpha 5. However I believe this is the
same laptop Mike B. has, so if this affects more than this specific
model it might be good to get confirmations there.

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[Bug 207473] Re: Screen brightness double level changes

[Guido Conaldi]

Tested Jaunty latest cdlive. The bug is still there.
Given that Dell actually sells the laptops affected by this bug with Ubuntu 
preinstalled, it seems incredible to me that after more than a year the bug is 
still not fixed.

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[Bug 207473] Re: Screen brightness double level changes

[ethanay]

If the package xserver-xorg-video-intel - 2.5.1 fixes the problem, can
it be backported to Hardy?

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[Bug 207473] Re: Screen brightness double level changes

[Michael Rooney]

Would someone with some specific knowledge into this issue take a minute
to see if bug 257827 is a duplicate of this one? Thanks!

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[Bug 207473] Re: Screen brightness double level changes

[Andreas Wenning]

As far as I can tell bug 257827 covers the kernel part of this bug. As
only the kernel part of this bug is still open and bug 257827 seems to
contain the most information regarding that part of the bug, I would
suggest marking this bug as a duplicate of bug 257827 (eg. letting bug
257827 be the master-bug).

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[Bug 207473] Re: Screen brightness double level changes

[Javier Jardón]

Hello all,

I have a XPS 1330 with Intel GM965/GL960. Ubuntu Intrepid.

This problem is resolved for me installing the new version of xserver-
xorg-video-intel - 2.5.1

I installed it from this PPA: https://launchpad.net/~intel-gfx-
testing/+archive

Regards

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[Bug 207473] Re: Screen brightness double level changes

[Guido Conaldi]

Just tested Jaunty Alpha 2 with kernel 2.6.28-3 and it is not fixed
there either, despite the patch having been applied to 2.6.28-rc4.

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[Bug 207473] Re: Screen brightness double level changes

[Guido Conaldi]

Still an issue after the updates on my dell xps m1330.

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[Bug 207473] Re: Screen brightness double level changes

[Andy Whitcroft]

Could those still suffering this problem confirm if this is still a
problem with the gnome-power-manager updates from -proposed which are
slated to fix a number of brightness control issues.

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[Bug 207473] Re: Screen brightness double level changes

[Vegar]

Not fixed with g-p-m from intrepid-proposed on my Thinkpad T61. G-p-m
still reports one brigtness-down keypress as two.

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[Bug 207473] Re: Screen brightness double level changes

[Andy Whitcroft]

This may be related to bug #257827, on that bug we have built some test
kernels with fixes for some systems which show this issue.  If you are
running/able to test with intrepid kernels there are some recent test
kernels at the url below.  If you could test those and report back that
would be useful:

http://people.ubuntu.com/~apw/lp257827/

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[Bug 207473] Re: Screen brightness double level changes

[Kostas Chatzikokolakis]

On my Dell XPS 1330, the test kernel (i386) doesn't seem to make any
difference. Without the workarounds, brightness increases twice at each
press. The two workarounds behave exactly as I describe in my previous
post (two posts above).

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[Bug 207473] Re: Screen brightness double level changes

[José P Valdés]

Andy, the bug is still present using the kernel you linked to. This is
on a Dell 640m, i386.

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[Bug 207473] Re: Screen brightness double level changes

[Andy Whitcroft]

Thanks for those who have tested, clearly this is not related directly.

@Mario Limonciello -- you mentioned applying an upstream patch, which an
updated version was applied to the test kernels above.  Could you see if
this fixes your case.

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[Bug 207473] Re: Screen brightness double level changes

[Bug Watch Updater]

** Changed in: linux
   Status: Confirmed = Fix Released

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[Bug 207473] Re: Screen brightness double level changes

[Kostas Chatzikokolakis]

On my xps 1330, the two workarounds behave as follows:

- putting blacklist video in /etc/modprobe.d/blacklist

The brightness keys work fine, the only issue is that the brightness
indicator does not appear when you press the buttons.

NOTE: this workaround was causing a serious problem, disabling keyboard
events after changing the brightness (bug #261721). However, this bug
was fixed by the 2.6.27-8 kernel (available in proposed), so with this
kernel the workaround can be used again.

- deleting /etc/acpi/video_brightnessup/down.sh

This also works, including the brightness indicator. However, as
reported by Sandro Mani above, the brighness jumps to 100% and then
quickly back to the desired level, which is annoying and potentially
harmful for the screen.

So I personally prefer the first workaround for now (hoping for a fix
soon)

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[Bug 207473] Re: Screen brightness double level changes

[Amir Khosroshahi]

The original problem observed in gnome-power-manager (that is multiple
levels change of back-light using Fn keys when g-p-m is running) is not
yet resolved. It started for me after upgrading to 8.04 and is still
there after upgrading to 8.10. My system is a Dell Inspiron 6400.

The odd thing I want to report is that after upgrading to 8.10, using Fn
keys to adjust brightness changes the brightness randomly. At least in
8.04 it always changed in double levels. But now in Intrepid, using Fn
keys, the brightness level changes by 1, 2 or 3 levels with no pattern
and changes in a random fashion.

Another odd observation, IMHO, is that such a nasty bug that affects so
many of us linger for so long. Where doth the problem lie?!

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[Bug 207473] Re: Screen brightness double level changes

[clem-vangelis]

I'm also experiencing this problem on both xps M1330 ( 8400M GS )  and
inspiron 9400 (7900M GS ) . Moreover this bug is present since 7.10 and
follow me to 8.04 and 8.10 apparently...

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[Bug 207473] Re: Screen brightness double level changes

[Sandro Mani]

As stated somewhere else, by renaming /etc/acpi/video_brightnessup/down.sh or 
modifying their contents to e.g.
#!/bin/sh

test -f /usr/share/acpi-support/key-constants || exit 0

. /usr/share/acpi-support/key-constants
#acpi_fakekey $KEY_BRIGHTNESSUP

the screen brightness won't double-change anymore. However, what I notice is 
that when for instance reducing the brightness, it first goes to the minimum, 
and then immediately to the desired level. The same applies for increasing 
brightness: it first jumps to the maximum, and then to the desired level, what 
is not really healthy for the LCD backlight...  The change is usually so fast 
that one can hardly notice it.
If I use the brightness applet, everything works fine, except that the applets 
still states that it cannot get the panel brightness (though working fine!).

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[Bug 207473] Re: Screen brightness double level changes

[Tim Fuchs]

I am also experiencing this bug, but at least now it doesn't change the
brightness by 3 levels but only 2.

Ubuntu 8.10 intrepid final
XPS m1330

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[Bug 207473] Re: Screen brightness double level changes

[Mathias Burén]

I experience the same behaviour as above. Inrepid 8.10 final, Dell
Inspiron 1520, using NVIDIA 177.80 on a 8600M GT. There are 7 levels of
brightness supported by the hardware:

[EMAIL PROTECTED]:/sys/devices/virtual/backlight/acpi_video0# ls
actual_brightness  brightness  power  uevent
bl_power   max_brightness  subsystem
[EMAIL PROTECTED]:/sys/devices/virtual/backlight/acpi_video0# echo 1  
brightness 
[EMAIL PROTECTED]:/sys/devices/virtual/backlight/acpi_video0# echo 2  
brightness 
[EMAIL PROTECTED]:/sys/devices/virtual/backlight/acpi_video0# echo 3  
brightness 
[EMAIL PROTECTED]:/sys/devices/virtual/backlight/acpi_video0# echo 4  
brightness 
[EMAIL PROTECTED]:/sys/devices/virtual/backlight/acpi_video0# echo 5  
brightness 
[EMAIL PROTECTED]:/sys/devices/virtual/backlight/acpi_video0# echo 6  
brightness 
[EMAIL PROTECTED]:/sys/devices/virtual/backlight/acpi_video0# echo 7  
brightness 
[EMAIL PROTECTED]:/sys/devices/virtual/backlight/acpi_video0# echo 8  
brightness 
bash: echo: write error: Invalid argument

There is also a acpi_video1 directory, with same files. They also change
the brightness of the LCD monitor.

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[Bug 207473] Re: Screen brightness double level changes

[Mario Limonciello]

this is actually caused by a BIOS bug/kernel bug (depends who you talk
to).  It's because the BIOS has tables in the DSDT to represent the
possible different video cards that would ship with the box (UMA or
discrete).  There is a fix available upstream, but it causes regressions
on other machines.  It will need to be tracked until it's ready.

** Changed in: hal (Ubuntu)
   Status: Confirmed = Invalid

** Changed in: hal (Ubuntu Hardy)
   Status: Confirmed = Invalid

** Bug watch added: Linux Kernel Bug Tracker #11647
   http://bugzilla.kernel.org/show_bug.cgi?id=11647

** Also affects: linux via
   http://bugzilla.kernel.org/show_bug.cgi?id=11647
   Importance: Unknown
   Status: Unknown

** Also affects: linux (Ubuntu)
   Importance: Undecided
   Status: New

** Changed in: linux (Ubuntu)
   Importance: Undecided = Low
   Status: New = Confirmed

** Changed in: linux (Ubuntu Hardy)
   Importance: Undecided = Low
   Status: New = Confirmed

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[Bug 207473] Re: Screen brightness double level changes

[Bug Watch Updater]

** Changed in: linux
   Status: Unknown = Confirmed

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Re: [Bug 207473] Re: Screen brightness double level changes

[Francisco Borges]

This bug was a bug about the KDE Guidance that didn't work, while at
the same machine the Gnome power guidance would work perfectly.

Allow me express my frustration with Ubuntu bug management people that
are WAY too eager to:
- mark different bugs as duplicates from each other;
- folks that don't read the bug history, and start changing the
packages the bug applies to.

Kind regards,
Franciso

On Mon, Oct 20, 2008 at 9:46 AM, Bug Watch Updater
[EMAIL PROTECTED] wrote:
 ** Changed in: linux
   Status: Unknown = Confirmed

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-- 
Francisco

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[Bug 207473] Re: Screen brightness double level changes

[Flo]

In my case, the problem is on GNOME with Ubuntu 8.04 and 8.10.

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Re: [Bug 207473] Re: Screen brightness double level changes

[Scott Kitterman]

This bug ended up having multiple parts.  The Guidance part was fixed long 
ago.

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[Bug 207473] Re: Screen brightness double level changes

[Guido Conaldi]

Would it be feasible to include the upstream patch in Dell specific
packages in dell ppa or would that require to recompile the entire
kernel?

In any case, I found that getting rid, by renaming them, of
/etc/acpi/video_brightnessup.sh and /etc/acpi/video_brightnessdown.sh
seems to workaround the problem. I do not know if this may cause any
regression.

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[Bug 207473] Re: Screen brightness double level changes

[Adam]

Also, why wasn't this a problem in gutsy?  My brightness shortcut keys
worked just fine then.  It wasn't until 8.04 that it was broken (and
lingers in 8.10, so far).  Was there something that specifically
prevented this behavior in gutsy, or was there something introduced in
hardy that caused it?

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[Bug 207473] Re: Screen brightness double level changes

[Adam]

Also, why wasn't this a problem in gutsy?  My brightness shortcut keys
worked just fine then.  It wasn't until 8.04 that it was broken (and
lingers in 8.10, so far).  Was there something that specifically
prevented this behavior in gutsy, or was there something introduced in
hardy that caused it?

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[Bug 207473] Re: Screen brightness double level changes

[Ciso]

On my Dell XPS M1330 it seems to me that changing the brightness from
the applet works fine, but if I open a menu and I press the brightness
key, nothing changes.

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[Bug 207473] Re: Screen brightness double level changes

[Andrew Bennetts]

(I'm the reporter of bug #282963, which has been marked as a duplicate
of this bug.)

The brightness applet doesn't work for me.  If I try changing the
brightness with it, the applet hangs, and appearts to steal keyboard and
mouse focus until I switch to a text VT and kill the applet.  I have a
Dell Inspiron 630m.

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[Bug 207473] Re: Screen brightness double level changes

[Flo]

Same result as Kuba Górski too on my Dell XPS M1330 with Nvidia 8400.

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[Bug 207473] Re: Screen brightness double level changes

[Sandro Mani]

I get the same result as Kuba Górski, hardware is Dell Inspiron 1720.

Related to brightness issues: did anyone else notice the problem with
the brightness applet described in bug #81339, more precisely what
described in the commend I posted there
(https://bugs.launchpad.net/ubuntu/+source/hal/+bug/81339/comments/11)?

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[Bug 207473] Re: Screen brightness double level changes

[Kuba Górski]

I have noticed something interesting..
When a menu is open (Applications,Places or Systems), and Fn+up/Fn+down keys 
are pressed, the screen brightness is changed correctly without any 
double/quadruple steps, although, now there are only 5 brightness levels, 
whereas my LCD screen supports 8 levels . Can somebody confirm this?

I can confirm that killing the gnome-power-manager process fixes the
multiple brightness level hopping, however there are only 5 brightness
levels.

Now, the amount of brightness hops in my case have varied from 2 to 4
steps for a single Fn+Up/Down press. Which leaves me with the conclusion
that the acpi  gnome-power-manager brightness controls are overlapping.

For now im sticking to a gnome-panel brightness applet, the blacklist video 
hack creates a lot of new problems here.
Running Dell M1330, GF9400M GS, 2.6.27-7-generic, and latest Intrepid updates 
as of now.

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[Bug 207473] Re: Screen brightness double level changes

[Thomas Zander]

Same notebook here: Dell XPS M1330, nvidia GF8400 GS.

I can confirm that, as you say, the amount of brightness 'hops' in my case 
have varied from 2 to 4 steps for a single Fn+Up/Down press.
However it seems to me that the number of brightness hops also vary when a menu 
is open. The only difference to me is that this progress bar indicating the 
brightness level is not shown.

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