It is working with standard trusty kernel now on trusty.
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Title:
8086:0106 [Aspire V5-431] 13.04: Brightness control visible but doe
As of 3.14-rc4 mainline it has been fixed for me. Running 3.14-rc8
mainline now.
Question is if it can be patched into the 3.13 series of trusty.
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I just reported the bug upstream http://www.spinics.net/lists/linux-
acpi/msg48422.html, it has not yet reached the Kernel Bug Tracker.
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Ok, a few questions.
I visited the url http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D
referened in https://wiki.ubuntu.com/Kernel/MainlineBuilds under the
section "Upstream kernels archive".
I downloaded the latest for saucy through Ubuntu-Mainline-Kernel-Updater
script KernelUpdateChecke
https://bugzilla.kernel.org/show_bug.cgi?id=68751
** Bug watch added: Linux Kernel Bug Tracker #68751
http://bugzilla.kernel.org/show_bug.cgi?id=68751
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Tested with linux-image-3.13.0-031300rc8-generic with the exact same
results as previously.
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Title:
[Aspire V5-431]13.04: Brightness
Instead, you would want to utilize the kernel.org format and repost to
the linux-acpi mailing list with the latest mainline kernel results.
I did that already: http://www.spinics.net/lists/linux-
acpi/msg48469.html.
I have responded to this request:
http://www.spinics.net/lists/linux-acpi/ms
Upstream now marked this as a duplicate of:
https://bugzilla.kernel.org/show_bug.cgi?id=51231
workaround for 3.13 (maybe previous versions as well) is the kernel
option:
video.use_native_backlight=1
** Bug watch added: Linux Kernel Bug Tracker #51231
http://bugzilla.kernel.org/show_bug.cgi?
A fix is coming to 3.14
https://bugzilla.kernel.org/show_bug.cgi?id=51231#c164
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Title:
[Aspire V5-431]13.04: Brightness control vis
Christopher M. Penalver, I will do as soon as I have some time in my
schedule.
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Title:
[Aspire V5-431]13.04: Brightness control visi
It doesn't work running from DVD. I am guessing acpi_backlight=vendor i
needed.
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Title:
[Aspire V5-431]13.04: Brightness control vis
Regarding tags: added: bios-outdated-1.22
It's the latest non-efi BIOS.
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Title:
[Aspire V5-431]13.04: Brightness control visible bu
Sorry I wasn't clear.
The test I made from the saucy DVD was with upgraded BIOS (1.22). It's
doesn't work right of the box, I am guessing that the kernel parameters
above would make it work. That's how I made it work on my current
raring.
Output is:
V1.22
03/15/2013
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I will. I am a bit busy at the moment, but I will take care of it ASAP.
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Title:
[Aspire V5-431]13.04: Brightness control visible but
I am now running saucy. It doesn't work with or without
acpi_backlight=vendor.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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[ 15.043134] acer_wmi: Brightness must be controlled by acpi video
driver
What can I do about that?
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Title:
[Aspire V5-431]13.04:
kernel 3.11.0-12
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Title:
[Aspire V5-431]13.04: Brightness control visible but does nothing
Status in “linux” package in Ubuntu:
C
# echo 20 > /sys/class/backlight/intel_backlight/brightness
works
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Title:
[Aspire V5-431]13.04: Brightness control visible but does
3.12.0-031200rc6-generic
[ 14.025391] acer_wmi: Brightness must be controlled by acpi video
driver
The same thing.
ACPI thinks it can do the brightness but cannot, and with
acpi_backlight=vendor (to disable ACPI controlling brightness), only
the intel_backlight entry in /sys/class/backligt sho
Ubuntu GNOME 15.10
[ 23.786996] [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in
ips_enabled (expected 1, found 0)
[ 23.787000] [ cut here ]
[ 23.787017] WARNING: CPU: 0 PID: 274 at
/build/linux-AxjFAn/linux-4.2.0/drivers/gpu/drm/i915/intel_display.c:12326
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