On my Fujitsu Lifebook A512 I should be able to adjust the brightness
pressing Fn+F6 or Fn+F7. The brightness-indicator pop-up works but the
brightness doesn't change. This should be related to the cpi_video0 /
intel_backlight issue.
I found a workaround here
http://ubuntuforums.org/showthread.php
Тимофей, thank you for your response. Unfortunately, while I'm usually
pretty good on triaging backlight bugs that have a clear kernel cause
relationship, I'm stumped on this one. I'm marking back to Confirmed for
someone else to check into or I come back with a better idea.
Thank you for your und
Christopher, i havn't this option and acpi_backlight=vendor no effect to this
problem. I try add this after second comment
Quinn Balazs (qbalazs) wrote on 2013-11-12: #2
Please run "apport-collect 1249219" in order to collect some useful logs.
I think adding the boot flag of "acpi_backlight
Тимофей, thank you for providing the requested information. In
Saucy/Trusty, if you remove all non-default kernel parameters (ex.
acpi_backlight=vendor) does this change anything?
** Description changed:
After upgrading to new release (13.10), when i control brightness,
system change value in
Christopher, on 13.04 all work fine.
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Title:
backlight control acpi_video0 instead intel_backlight
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Тимофей, so regarding strictly 13.04/Raring, not any other releases,
this issue does occur yes?
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Title:
backlight control acpi_video0 instead int
Christopher this problem also have in all live cd, which released after
13.04
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Title:
backlight control acpi_video0 instead intel_backlight
To m
Тимофей, so just to clarify, focusing only on Raring/13.04, does this
issue occur for example with the live environment via
http://releases.ubuntu.com/ ?
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Christopher M. Penalver (penalver), this problem exist only on new
releases, with out any dependencies with kernel.
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Title:
backlight control acp
Тимофей, did this problem not occur in Raring with the default
repository 3.8.x kernel?
** Tags removed: needs-upstream-testing
** Description changed:
- After upgrading to new release (13.10), i got a little bug.
- When i control brightness, system change value in file
/sys/class/backlight/acp
Yes, when i install 3.13rc2 to Raring the problem not occur.
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Title:
backlight control acpi_video0 instead intel_backlight
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Тимофей, just to clarify, when you install http://kernel.ubuntu.com
/~kernel-ppa/mainline/v3.13-rc2-trusty/ in Raring the problem does not
occur?
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I guarantee it does not depend on the kernel version. If install new kernel in
13.04 (for example 3.13), the bug does not appear.
I think in backlight control (in gnome-system-settings) can be added switcher
to video outputs
As Notebook screen and VGA, HDMI external output and other.
This fix, ca
Тимофей, could you please test the latest mainline kernel via
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.13-rc2-trusty/ and
advise to the results?
** Tags removed: kernel-bug-reported-upstream
** Tags added: latest-bios-44cn43ww needs-upstream-testing
** Tags added: regression-release
** C
** Tags removed: kernel-bug-exists-upstream
** Tags added: kernel-bug-reported-upstream
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Title:
backlight control acpi_video0 instead intel_backl
This issue appears to be an upstream bug, since you tested the latest
upstream kernel. Would it be possible for you to open an upstream bug
report[0]? That will allow the upstream Developers to examine the issue,
and may provide a quicker resolution to the bug.
Please follow the instructions on th
** Tags added: kernel-bug-exists-upstream
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Title:
backlight control acpi_video0 instead intel_backlight
To manage notifications about this bug g
> I think adding the boot flag of "acpi_backlight=vendor" on your next boot
> should make the values change in
> /sys/class/backlight/intel_backlight/brightness.
I trying this, this no effect.
> Would it be possible for you to test the latest upstream kernel? Refer to
> https://wiki.ubuntu.com/
apport information
** Tags added: apport-collected trusty
** Description changed:
After upgrading to new release (13.10), i got a little bug.
When i control brightness, system change value in file
/sys/class/backlight/acpi_video0/brightness instead of
/sys/class/backlight/intel_backlight/b
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v3.12 kernel[0].
If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.
If the mainline kernel does not fix t
Please run "apport-collect 1249219" in order to collect some useful
logs.
I think adding the boot flag of "acpi_backlight=vendor" on your next
boot should make the values change in
/sys/class/backlight/intel_backlight/brightness.
** Package changed: ubuntu => linux (Ubuntu)
** Changed in: linux
Thank you for taking the time to report this bug and helping to make
Ubuntu better. It seems that your bug report is not filed about a
specific source package though, rather it is just filed against Ubuntu
in general. It is important that bug reports be filed about source
packages so that people
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