I know this is marked as fixed, but I am having what appears to be the
same problem on an Acer aspire timelineX 1830T in karmic kubuntu, fully
updated. I wondering if it is a regression or if this model needs
another patch.
With either xbacklight or the hotkeys, no change is made.
After applying
This bug was fixed in the package linux - 2.6.31-11.38
---
linux (2.6.31-11.38) karmic; urgency=low
[ Stefan Bader ]
* [Upstream] acerhdf: Limit modalias matching to supported boards
- LP: #435958
[ Tim Gardner ]
* [Config] Added sata_via to d-i/modules/sata-modules
Thanks, Stefan.
The package you have built works flawlessly, /sys interface provides
correct value and keyboard controls work properly.
Tested linux-image-2.6.31-11-generic_2.6.31-11.36bug428910v1_i386.deb.
--
Acer Aspire 5520 has backlight broken in Karmic Koala
https://bugs.launchpad.net/bugs
Hm, I had no problem in adding the upstream patch and yours seems to
miss a few things. As I found another commit which seems to be related
(as I mentioned earlier, the query function seems to return incorrect
values). So I went forward and build test kernels with both patches
applied. Maybe you ca
** Attachment added: "patched
/lib/modules/2.6.31-11-generic/kernel/drivers/acpi/video.ko"
http://launchpadlibrarian.net/32736596/video.ko.gz
--
Acer Aspire 5520 has backlight broken in Karmic Koala
https://bugs.launchpad.net/bugs/428910
You received this bug notification because you are a m
The patch does not apply cleanly to 2.6.31-11-generic, some minor tweaks
are required.
The backlight controls now work partially.
Direct write to /sys/devices/virtual/backlight/acpi_video0/brightness
yields correct results, i.e. I can set backlight level properly by
writing 1..9 to that file, gre
Dear Stefan,
Thanks for your time investigating this bug!
So, I added acpi_backlight=vendor string to the kernel cmdline and backlight
controls DO work now contrary to what gets printed to dmesg:
[ 461.856388] ACPI: Failed to switch the brightness
[ 463.473236] ACPI: Failed to switch the brigh
Note: this upstream patch looks interesting:
commit 90c53ca426cb93d15eefea79dcf6bd15ad3ffeb4
Author: Zhang Rui
Date: Mon Aug 31 12:39:54 2009 -0400
ACPI video: work-around BIOS AML bug in _BQC
_BQC on some laptops returns an uninitialized value when it's
invoked for the first
I had a look at the data provided. It seems that before the patch,
brightness was controlled by the acer-wmi driver (as the definition
provides only _DOD and would therefor have been ignored). Now the acpi
video driver looks at the video device but seems to get an invalid
brightness value (which st
** Changed in: linux (Ubuntu)
Status: Triaged => In Progress
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Stefan Bader (stefan-bader-canonical)
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Acer Aspire 5520 has backlight broken in Karmic Koala
https://bugs.launchpad.net/bugs/428910
You received this bug notificatio
** Attachment added: "video.txt"
http://launchpadlibrarian.net/32298933/video.txt
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Acer Aspire 5520 has backlight broken in Karmic Koala
https://bugs.launchpad.net/bugs/428910
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ubu
Sure, here's acpidump.
P.S. A workaround that works most of the time, for those who have the
same symthoms: When X starts at low brightness, switch to some non-X vt,
decrease brightness and switch back to X.
** Attachment added: "acpidump.txt"
http://launchpadlibrarian.net/32298922/acpidump.tx
Hi Roman,
Can you attach some additional debug information? Please run the
following commands and attach the resulting "acpidump.txt" and
"video.txt" file. Thanks!
sudo acpidump -o acpidump.txt
grep -r . /proc/acpi/video/ > video.txt
--
Acer Aspire 5520 has backlight broken in Karmic Koala
ht
** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu)
Status: New => Triaged
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Acer Aspire 5520 has backlight broken in Karmic Koala
https://bugs.launchpad.net/bugs/428910
You received this bug notification because you are a member of Ubuntu
Bugs,
** Attachment added: "AlsaDevices.txt"
http://launchpadlibrarian.net/31751214/AlsaDevices.txt
** Attachment added: "BootDmesg.txt"
http://launchpadlibrarian.net/31751215/BootDmesg.txt
** Attachment added: "CRDA.txt"
http://launchpadlibrarian.net/31751216/CRDA.txt
** Attachment added: "
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