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** Also affects: linux via
http://bugzilla.kernel.org/show_bug.cgi?id=66501
Importance: Unknown
Status: Unknown
** Description changed:
It used to work with the workaround suggested at
http://wiki.daviddarts.com/Ubuntu_Maverick_on_the_Asus_UL30VT#Screen_Brightness
which modifi
The discussion continues on
https://bugzilla.kernel.org/show_bug.cgi?id=66501
** Bug watch added: Linux Kernel Bug Tracker #66501
http://bugzilla.kernel.org/show_bug.cgi?id=66501
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Here is a workaround from Aaron Lu on linux-acpi: specify the backlight
option in xorg.conf.
Section "Device"
Identifier "Default Device"
Option "Backlight""intel_backlight"
Driver "intel"
BusID "PCI:0:2:0"
EndSection
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issue reported upstream on linux-acpi mailing list:
http://marc.info/?t=13860036283&r=1&w=2
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https://bugs.launchpad.net/bugs/1178796
Title:
8086:2a42 [Asus UL80VT] Backlight control
Guillaume Millet, the issue you are reporting is an upstream one. Could
you please report this problem through the appropriate channel (I would
start with linux-acpi) by following the instructions _verbatim_ at
https://wiki.ubuntu.com/Bugs/Upstream/kernel#KernelTeam.2BAC8-KernelTeamBugPolicies.Over
** Tags removed: kernel-bug-exists-upstream-v3.12 needs-upstream-testing
** Tags added: kernel-bug-exists-upstream-v3.13-rc2
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Title:
8086:2a42 [A
v3.12.1 tested, as well as v3.13-rc2; bug still present.
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Title:
8086:2a42 [Asus UL80VT] Backlight control does not work with Intel
integrated
Guillaume Millet, could you please test the latest mainline kernel via
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.12.1-trusty/ ?
** Tags removed: kernel-bug-exists-upstream-v3.11
** Tags added: kernel-bug-exists-upstream-v3.12
** Changed in: linux (Ubuntu)
Status: Expired => Incomple
Tested with 3.12-saucy, same as in my last message.
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Title:
8086:2a42 [Asus UL80VT] Backlight control does not work with Intel
integrated card,
[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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T
Guillaume Millet, could you please test the latest mainline kernel via
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.12-rc1-saucy/ and
advise on the results?
** Tags added: lucid
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Tested Live Lucid
http://old-releases.ubuntu.com/releases/lucid/ubuntu-10.04.4-desktop-amd64.iso.
Result: same as in Precise, that is, the screen brightness applet reacts to the
hotkeys but the screen brigthness does not change.
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Guillaume Millet, for regression testing purposes, could you please test
Lucid via http://old-releases.ubuntu.com/releases/lucid/ and advise on
the results?
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The bug existed on Maverick, as noticied on
http://wiki.daviddarts.com/Ubuntu_Maverick_on_the_Asus_UL30VT#Screen_Brightness.
However, today, Precise is the last release still supported on Desktop. I have
not tested any other release.
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Guillaume Millet, following
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1178796/comments/57
, was the problem not reproducible without using any WORKAROUNDS in a
release prior to Precise?
** Tags added: precise
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Bug
Christopher, I am not sure to understand your question. Did you mean,
did the problem appear before Raring if the setpci method was not used?
yes, for example, in 12.04 (comment #46).
I didn't try to disable the Intel card in a release prior to Raring, I
suppose that situation would be similar as
Guillaume Millet, was the problem not reproducible without using any
WORKAROUNDS in a release prior to Raring?
** Tags added: needs-upstream-testing
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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** Description changed:
It used to work with the workaround suggested at
http://wiki.daviddarts.com/Ubuntu_Maverick_on_the_Asus_UL30VT#Screen_Brightness
which modifies asus-brn-down.sh to use the "setpci" method.
But I had forgotten that workaround and I suspect that upgrading to
Rar
** Description changed:
It used to work with the workaround suggested at
http://wiki.daviddarts.com/Ubuntu_Maverick_on_the_Asus_UL30VT#Screen_Brightness
which modifies asus-brn-down.sh to use the "setpci" method.
But I had forgotten that workaround and I suspect that upgrading to
Rar
Just to correct my comment #54:
-nouveau
+i915
The goal is to fix i915 not adjusting brightness correctly.
Ideally, the nvidia card is enabled only when necessary, using either
nouveau or nvidia driver, thanks to Bumblebee (which, for Saucy and
newer, is provided by a supported Ubuntu repository)
** Summary changed:
- [Asus UL80VT] Backlight control does not work, but there are entries in
/sys/class/backlight
+ 8086:2a42 [Asus UL80VT] Backlight control does not work with Intel integrated
card, but there are entries in /sys/class/backlight
** Changed in: linux (Ubuntu)
Status: Inc
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