Dear Sirs!
I am completely newbie in Linux and in Linux Mint in particular. In my
case adding Option "RegistryDwords" "EnableBrightnessControl=1" clause
in xorg.conf did not change anything in brightness.
uname -a
Linux Dell-XPS-L702X 4.10.0-38-generic #42~16.04.1-Ubuntu SMP Tue Oct 10
16:32:20
I have a DELL XPS L702X laptop with the nVidia GTX 555M 3GB RAM with the
120Hz 3D Screen.
I use Ubuntu 12.10 32-bit with the Experimental NVIDIA binary Xorg
driver from nvidia-experimental-310(proprietary).
Thanks to all the comments, I got my Fn+F4/F5 brightness working aswell.
Though I did not
I have fixed this by changing my xorg.conf file from this:
Section "Device"
Identifier "Default Device"
Option "NoLogo""True"
EndSection
to this:
Section "Device"
Identifier "Default Device"
Option "NoLogo""True"
EndSection
Section "Sc
Why does my xorg.conf file look like the following and not like Hemantkumar
Gaswami's xorg.conf file?
This is what I have:
Section "Device"
Identifier "Default Device"
Option "NoLogo""True"
EndSection
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For the non-tecnically minded could someone please explain exactly what
to type or do to:
"add the following to xorg.conf:
Option "RegistryDwords" "EnableBrightnessControl=1"
I have no idea how to add this to the xorg.conf file.
This bug is extremely irritating. When the laptop enters power sav
I can also confirm that the suggestion posted by "Pierre Chifflier"
works. Though myself not being a computer geek I had problems
implementing it. Below is the example of how it looks on my xorg.conf
file and this works for me.
Section "Screen"
Identifier "Screen0"
Device "Devi
I can confirm that this still happens on 12.04 LTS.
Adding the line to xorg.conf as suggested by Pierre Chifflier makes it
work correctly. I'm using proprietary drivers too.
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The solution from Pierre Chifflier appears to work on Ubuntu 11.04 with
the proprietary nvidia drivers too.
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Title:
Laptop brightness on Dell XPS
Additional note to my previous comment: this is on a Debian Unstable,
with proprietary nvidia module (280.13-4). Not sure if this can work
with nouveau.
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I can confirm the problem on a Dell XPS l702x with 3D NVidia GT 555m
I have solved the problem here by adding the following to xorg.conf:
Option "RegistryDwords" "EnableBrightnessControl=1"
Hope this helps,
Pierre
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The value in files
- /sys/class/backlight/acpi_video0/brightness
- /sys/class/backlight/acpi_video0/actual_brightness
changes (from 0 to 15) when using Fn Keys but not the brightness of
screen. The OSD appear only when value is equals to 15.
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I can confirm this as well with the same system, Dell XPS l702x 3D NVidia GT
555m.
I'm using KDE and i've not OSD indications when using Fn Key
$ uname -a
Linux aragorn 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:24 UTC 2011
x86_64 x86_64 x86_64 GNU/Linux
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I too can confirm this. Dell XPS l702x 3D NVidia GT 555m.
- ERROR: Method "GetBrightness" with signature "" on interface
"org.freedesktop.UPower.KbdBacklight" doesn't exist
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I can confirm this as well with the same system, Dell XPS l702x 3D NVidia GT
555m.
$ uname -a
Linux ubuntu-star-destroryer 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11
03:31:24 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
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I too can confirm this. I've the same machine (XPS l702x aka XPS 17),
display (hd 3D), and graphics card (GT 555m). Same results on each of
the above suggested tests. All indications (OSD, /proc values, g-p-m
output) are that the brightness is changing, but the actual screen does
not change.
I can confirm the exact same results on the same laptop.
Dell XPS l702x with full-hd 3d display and NVidia GT 555m.
$ uname -a
Linux timo-laptop 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:24 UTC 2011
x86_64 x86_64 x86_64 GNU/Linux
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** Tags added: amd64 natty
** Tags removed: brightness control screen
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Title:
Laptop brightness on Dell XPS not controllable
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uname -a yields:
Linux Dell-XPS 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:24 UTC
2011 x86_64 x86_64 x86_64 GNU/Linux
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Title:
Laptop bright
Hello Zordid
can you please run in a terminal
uname -a
and paste here the output
Thanks
Fabiio
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Title:
Laptop brightness on Dell XPS not controlla
TI:00:21:52 TH:0x6d70a0 FI:gpm-backlight-kbd.c
FN:gpm_backlight_kbd_init,646
- ERROR: Method "GetBrightness" with signature "" on interface
"org.freedesktop.UPower.KbdBacklight" doesn't exist
*** WARNING ***
TI:00:21:52 TH:0x6d70a0 FI:gpm-backlight-kbd.c
FN:gpm_backlight_kbd
Here's the log file.
Turned brightness down to lowest setting and up again using the fn-keys.
Nothing happened to the actual brightness, of course!
** Attachment added: "gpm.log"
https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/762670/+attachment/2056619/+files/gpm.log
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Hello
Can you please run this in a terminal:
killall gnome-power-manager && gnome-power-manager --verbose 2>&1 | tee
~/gpm.log
This kills gnome-power-manager and re-executes it in verbose mode,
saving the log file gpm.log to your home directory. Try to change the
brightness then attach this file
I got a new discovery: when playing with the brightness values I left
the actual_brightness at 0 (using the fn-keys).
After rebooting Ubuntu the screen's brightness was LOW! So, the
brightness value actually ends up controlling the screen's brightness -
but only at boot-time and only once!
I rais
The behavior I see does not quite fit into the 4 categories described in the
document.
Controls *seem* to work as function keys bring up the OSD and the bar can be
moved up and down - only the screen's actual brightness does not change at all.
Okay, I tried the following:
* added acpi_backligh
Hello
Can you please folow this guide?
https://wiki.ubuntu.com/Kernel/Debugging/Backlight
For any question, just ask here.
Thanks
Fabio
** Changed in: ubuntu
Status: New => Incomplete
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