I can confirm this regression in 3.8.0-22. Only noticed it when I went
on battery today.
Fix for me was the same as beerfan above. I also went one step further
and added:
echo 0 > /sys/class/backlight/intel_backlight/brightness
to rc.local and the following:
#!/bin/sh
# to fix backlight issues on resume
case "${1}" in
resume)
echo 0 > /sys/class/backlight/intel_backlight/brightness
;;
esac
to /etc/pm/sleep.d/99-backlightfix (remember to make it executable!).
Might need to alter it a bit to make it work for hibernate but
brightness control works on resume. Will test again on the next kernel
update.
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/954661
Title:
backlight brightness not adjustable by default on Dell XPS 13
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/954661/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
