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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Backlight settings vanish after some time"
href="https://bugs.freedesktop.org/show_bug.cgi?id=98759#c9">Comment # 9</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Backlight settings vanish after some time"
href="https://bugs.freedesktop.org/show_bug.cgi?id=98759">bug 98759</a>
from <span class="vcard"><a class="email" href="mailto:nico-freedesktop.org@schottelius.org" title="nico-freedesktop.org@schottelius.org">nico-freedesktop.org@schottelius.org</a>
</span></b>
<pre>Fun fact:
since restarting xorg yesterday, I cannot yet reproduce the problem. Neither
suspend, nor connecting / disconncting external output seem to reliable cause
the problem.
Things I have changed since the first report:
- upgraded from linux 4.8.8-1 to linux 4.8.8-2 (should not change anything,
only enabled / added the randomization flag)
- removed /etc/udev/rules.d/90-backlight.rules that I used for modesetting
driver+acpibacklight, which contained:
SUBSYSTEM=="backlight", ACTION=="add", RUN+="/bin/chgrp video
/sys/class/backlight/%k/brightness"
SUBSYSTEM=="backlight", ACTION=="add", RUN+="/bin/chmod g+w
/sys/class/backlight/%k/brightness"
I do not assume that either of both should have interfered with xorg and I am
also in the group video, as can be seen below.
[17:54] feder:~% id
uid=1000(nico) gid=1000(nico)
groups=1000(nico),14(uucp),90(network),91(video),92(audio),93(optical),98(power),100(users),150(wireshark),992(docker)
However I also remember having some days *with* backlight being present and
then vanishing - thus I'll report again, as soon as it vanishes.</pre>
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