With kernel 2.6.38 (ubuntu mainlinine daily 20110219):
when I close and then open the lid the backlight comes back with roughly half
the brightness.
I can use workaround 2 to set the brightness to full again.
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** Description changed:
+ [Status]
+ Happens on Maverick. Tested with 2.6.36 and 2.6.38 (see comment #37) kernel.
+ Happens on Lucid.
+
[Workaround 1]
For Acer Extensa 5635Z with bios version V0.3219 or newer adding
acpi_osi=Linux acpi_backlight=legacy as boot parameter resolves the issue.
Not running maverick to confirm post #33. Just waiting for a fix to be
released downstream.
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Sorry forgot to mention I removed 10.10 and installed 10.04 to resolve a
sound issue with 10.10.
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This Bug also effects Ubuntu Maverick Meerkat running on an Acer
TravelMate 5735Z and the workaround changing
GRUB_CMDLINE_LINUX_DEFAULT=quiet splash
to
GRUB_CMDLINE_LINUX_DEFAULT=quiet splash acpi_osi=Linux acpi_backlight=legacy
in /etc/default/grub works as well.
After updating Grub and
I wonder whether this https://launchpad.net/~kamalmostafa/+archive
/linux-kamal-mjgbacklight can be used here.
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I looked some more into this setpci workaround to see where that magical F4
address comes from:
sudo setpci -s 00:02.0 F4.B=a1 writes the brightness value (a1 in this example)
directly into a register called Legacy Backlight Brightness (at address F4)
of the [8086:2a42] hardware.
The fact that
** Description changed:
[Workaround 1]
For Acer Extensa 5635Z with bios version V0.3219 or newer adding
acpi_osi=Linux acpi_backlight=legacy as boot parameter resolves the issue.
[Workaround 2]
- See comment #28.
+ Write into the Legacy Backlight Brightness register (on [8086:2a42]
Both brightness and sound keys are working fine with fn on 10.10 for me.Hope
your one will get fix soon.
On Tue, Oct 12, 2010 at 2:41 AM, C Pirnat histoplasmo...@gmail.com
wrote:
I can confirm this bug still exists in 10.10 with my acer aspire 7736z
which has the same video card. I tried the
Backlight ajustment not working for Gateway EC19C01e with a Core I3, all
the others work fine for me (sound, monitor, wi-fi). Tried all methods
above none worked for me for backlight ajustment.
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You
I can confirm this bug still exists in 10.10 with my acer aspire 7736z
which has the same video card. I tried the first workaround passing
arguments to the kernel through grub which fixes the issue.
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lucid extensa 5635z backlight dimming not working at all
I just found a very promising workaround here:
http://www.uluga.ubuntuforums.org/showthread.php?t=1446943
I have not yet fully tried it, but I have verified that the two core ideas also
work for me:
a) When I press the brightness buttons the value in
/sys/class/backlight/acpi_video0/brightness
Wolfgang, the fn-key problem that you describe here also appeared when I
went from 64-bit Karmic to Lucid on my HP ProBook 4510s, which has an
ATI Mobility Radeon HD-4330. The fn-key problem disappeared after I
installed ATI Catalyst Display Driver version 10.6, which I downloaded
from the AMD
If you have a ATi Radeon GPU in your notebook, try updating to the new
Catalyst 10.5 release, that solved the problem for me.
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@Wolfgang, sure thing.
r...@r:~# grep . /sys/class/dmi/id/modalias
dmi:bvnPhoenix:bvrV0.3219:bd08/06/2009:svnAcer:pnExtensa5635Z:pvrNotApplicable:rvnAcer:rnBA50-MV:rvrNotApplicable:cvnAcer:ct10:cvrN/A:
r...@r:~# grep . /sys/class/dmi/id/bios_*
/sys/class/dmi/id/bios_date:08/06/2009
PS: There are BIOS updates available. As soon as I have some free time
I'll try to update my BIOS (only Windows and DOS versions available) and
report back.
rgds, René~
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Catalyst 10.5 worked for my Compaq 615 too, thx
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I have got same problem with brightness on my Sony Vaio VGN-NW11S Lucid
10.04.Before that it was absolutely fine.
Can anyone help with this bug?
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I can confirm the workaround of #12 (acpi_osi=Linux
acpi_backlight=legacy)
Having a standard Acer Extensa 5635Z with Intel T4300 and 2 GB RAM.
Monitor shall have a LED backlight.
Is there any further info I may provide for faster bug fixing?
rgds, René~
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lucid extensa 5635z backlight
Hi René
Could you please post the output of:
grep . /sys/class/dmi/id/modalias
and:
grep . /sys/class/dmi/id/bios_*
so that we know what systems and bios versions this workaround works for.
Thanks
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lucid extensa 5635z backlight dimming not working at all
** Description changed:
+ [Workaround]
+ For Acer Extensa 5635Z with bios version V0.3219 or newer adding
acpi_osi=Linux acpi_backlight=legacy as boot parameter resolves the issue.
+
+ [Report]
ubuntu lucid-desktop-amd64 20100206 (booting the iso from hd via grub2
loopback) on acer extensa
Hi Henning Moll !
can you help me (again ;) ) ?
I added your boot parameters to quiet splash but they don't work...
that is what i have done in /etc/default/grub :
GRUB_CMDLINE_LINUX_DEFAULT=quiet splash acpi_osi=Linux acpi_backlight=legacy
is it correct?
i had also tried the procedure that
it works! thank you Henning!
i wrote acpi-osi than acpi_osi .
thank you very much!
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Hi aury88
Could you please post the output of:
grep . /sys/class/dmi/id/modalias
and:
grep . /sys/class/dmi/id/bios_*
so that we know what systems this workaround works for.
Thanks
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You received
ok!
the comand grep . /sys/class/dmi/id/bios report:
dmi:bvnPhoenix:bvrV0.3219:bd08/06/2009:svnAcer:pnExtensa5635Z:pvrNotApplicable:rvnAcer:rnBA50-MV:rvrNotApplicable:cvnAcer:ct10:cvrN/A:
grep . /sys/class/dmi/id/bios_* report:
/sys/class/dmi/id/bios_date:08/06/2009
have exactly the same problem on my HP 6830s: before in 9.10 the backlight
controls
(fn-f7 / fn-f8) functioned properly - after upgrading to 10.04 not anymore
have no clue where to look
although the backlight went to fully bright after running the command
gnome-power-manager
--
lucid extensa
What is the output...
/sys/class/dmi/id/bios_date:12/21/2009
/sys/class/dmi/id/bios_vendor:Phoenix
/sys/class/dmi/id/bios_version:V1.3311
Or does it have to say Linux or 'Linux'?
No, just
acpi_osi=Linux acpi_backlight=legacy
Or do I have to enable something else in addition to the boot
On my Acer Extensa 5635z i can workaround this issue on lucid with the
following boot parameters:
acpi_osi=Linux acpi_backlight=legacy
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Hi Henning
I tried your workaround but had no success. Could it be the bios version? I
have:
dmi.bios.date: 05/07/2009
dmi.bios.vendor: Phoenix
dmi.bios.version: V0.3213
What is the output of:
grep . /sys/class/dmi/id/bios_*
on your system?
Or does it have to say Linux or 'Linux'? Or do I
Im affected by this bug, too. Notebook is a Compaq 615. The Fn keys and
brightness control worked with 9.10 but don't work since I updated to
10.4
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I have a problem with the dimming of backlight too on HP ProBook 4515s. Nothing
happens.
Work in 9.10 but not 10.04
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Having a similar problem. My fn brightness keys seem to work, but my
brightness never adjusts. Problem existed in 9.10 and still exists in
10.04.
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I have a problem with the dimming of backlight on a HP 6735b. The
notification is on the screen pressing the function keys, but nothing
happens. clicking on the panel the slider came to screen but clicking on
the slider, he is destroyed and I couldn't change the dimming level.
Erni35
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acpi_osi=Linux does not work for acer extensa 5635z. Checked with
todays lucid iso (loopback mounted from hd) since this helps for some
other acer hardware (see bug 392948).
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i confirm this bug:
Before i write about the situation on lucid, let me show the situation
on karmic:
Karmic:
Graphics only work with option nomodeset, black screen otherwise. Dimming of
backlight does not run out of the box, though the key presses are recognized
and the notifications appear.
Same behavior on Acer Extensa 5230E and Ubuntu karmic, i686. The
backlight does not change at all when I press Fn+Up/Down. Under jaunty
it worked without any problems.
Current system: Linux karin-pc 2.6.31-19-generic #56-Ubuntu SMP Thu Jan
28 01:26:53 UTC 2010 i686 GNU/Linux
Tell me if I shall
Set to Triaged and medium importance.
-JFo
** Changed in: linux (Ubuntu)
Status: New = Triaged
** Changed in: linux (Ubuntu)
Importance: Undecided = Medium
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** Attachment added: AlsaDevices.txt
http://launchpadlibrarian.net/38825806/AlsaDevices.txt
** Attachment added: AplayDevices.txt
http://launchpadlibrarian.net/38825807/AplayDevices.txt
** Attachment added: BootDmesg.txt
http://launchpadlibrarian.net/38825808/BootDmesg.txt
**
** Description changed:
ubuntu lucid-desktop-amd64 20100206 (booting the iso from hd via grub2
loopback) on acer extensa 5635z:
the backlight settings are simply ignored. the keys work, the notification
works (changing according to the key presses), but the display always stays at
the same
On karmic it did not work either, but could be worked around by
switching to other methods:
e.g.:
xrandr --output LVDS --set BACKLIGHT_CONTROL native
xrandr --prop shows the available methods:
BACKLIGHT_CONTROL: native
supported: native legacy
This might be related:
http://bugzilla.kernel.org/show_bug.cgi?id=13121 (a bunch of acers needed
quirks to make backlight dimming work)
** Bug watch added: Linux Kernel Bug Tracker #13121
http://bugzilla.kernel.org/show_bug.cgi?id=13121
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