Bug#746754: linux-image-3.14-1-amd64: It is not possible to control the brightness anymore
On Sat, May 03, 2014 at 08:55:08PM +0100, Ben Hutchings wrote:
> Control: tag -1 moreinfo
>
> On Sat, 2014-05-03 at 11:28 +0200, Aiko Barz wrote:
> > Package: src:linux
> > Version: 3.14.2-1
> > Severity: normal
> >
> > Dear Maintainer,
> >
> > * What led up to the situation?
> >
> > $ aptitude dist-upgrade
> >
> > * What exactly did you do (or not do) that was effective (or
> > ineffective)?
> >
> > $ reboot
> >
> > * What was the outcome of this action?
> >
> > The display had the maximum brightness and could not dimmed by using the dim
> > buttons
> >
> > * What outcome did you expect instead?
> >
> > That things work like they did in 3.13.
> >
> > * Workaround 1:
> >
> > Boot linux-image-3.13-1-amd64
> >
> > * Workaround 2:
> >
> > $ echo 0 > /sys/class/backlight/intel_backlight/brightness
> > After doing this, everything works as expected.
> > Found hint at https://bugs.archlinux.org/task/39798
>
> Please read <http://hansdegoede.livejournal.com/13889.html> and report
> your results.
Didn't find the time for that. But I googled the issue once more and it
looks like that the issue will be fixed in 3.15.
"Backlight control broken on Dell XPS13 w/ kernel 3.14-rc7"
https://bugs.freedesktop.org/show_bug.cgi?id=76276
GregKH accepted a revert patch for 3.14 to fix the regression there too:
http://comments.gmane.org/gmane.comp.freedesktop.xorg.drivers.intel/38181
Kind regards,
Aiko
--
:wq ✉
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