A fix is coming to 3.14
https://bugzilla.kernel.org/show_bug.cgi?id=51231#c164
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https://bugs.launchpad.net/bugs/1181927
Title:
[Aspire V5-431]13.04: Brightness control visible but
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
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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https://bugs.launchpad.net/bugs/1181927
Title:
[Aspire V5-431]13.04: Brightness control
Thomas Christensen, bugzilla is legacy, and largely ignored by upstream
developers. As well, it holds none of the information requested by
upstream, as previously and fully documented to you in
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1181927/comments/21
. Instead, you would want to
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:
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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Title:
Thomas Christensen, unfortunately you did not follow the instructions as
outlined in
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1181927/comments/21
. All your results were in the downstream Ubuntu kernel, not the
upstream mainline one. Hence, your post would most likely be promptly
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
Thomas Christensen, could you please provide the upstream URL created to
the mailing list archive as per
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1181927/comments/21
?
** Changed in: linux (Ubuntu)
Status: Triaged = Incomplete
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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 does
Thomas Christensen, the issue you are reporting is an upstream one.
Could you please report this problem through the appropriate channel by
following the instructions _verbatim_ at
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
** Description changed:
Brightness control visible but does nothing on 13.04...
The brightness up down buttons shows the overlay brightness icon going
up and down but it does not change the brightness (backlight).
I have tried adjusting the kernel options acpi_osi=x and
The v3.12-rc5 kernel is now available. Can you test this kernel to see if it
also exhibits this bug:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.12-rc5-saucy/
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kernel 3.11.0-12
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Title:
[Aspire V5-431]13.04: Brightness control visible but does nothing
To manage notifications about this bug go to:
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: Brightness
# echo 20 /sys/class/backlight/intel_backlight/brightness
works
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Title:
[Aspire V5-431]13.04: Brightness control visible but does nothing
To
Given the number of bugs that the Kernel Team receives during any
development cycle it is impossible for us to review them all. Therefore,
we occasionally resort to using automated bots to request further
testing. This is such a request.
We are approaching release and would like to confirm if
** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
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Title:
[Aspire V5-431]13.04: Brightness control visible but does nothing
** Tags removed: bios-outdated-1.22
** Tags added: latest-bios-1.22
** Tags removed: kernel-fixed-upstream
** Tags added: kernel-fixed-upstream-v3.10-rc2
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Thomas Christensen, as per http://us.acer.com/ac/en/US/content/drivers
an update is available for your BIOS (1.22). If you update to this, does
it change anything?
If not, could you please both specify what happened, and provide the output of
the following terminal command:
sudo dmidecode -s
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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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 visible but
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 but does
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 visible but does
** Summary changed:
- 13.04: Brightness control visible but does nothing
+ [Aspire V5-431]13.04: Brightness control visible but does nothing
** Tags added: bios-outdated-1.22
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