I spoke a bit too soon it seems. It had been working fine. Just now I left my laptop for ~5 minutes (it was on, screen open, brightness on full when I left).
I came back and found the brightness stuck on minimum (and my session had timed out, prompting me for my password - presumably something that happened as part of the time out is what triggered this bug and thus the brightness to be stuck on minimum). Echoing 0 to /sys/class/backlight/intel_backlight/brightness did not fix it. Suspending and unsuspending the laptop did fix it - the brightness was back at full when I unsuspended, and I have control again. I seem to recall reading either further up on here or elsewhere that the root cause is/was a race condition. I know next to nothing about things at this level (my current expertise is in Android and at the SDK level) but what I saw just now seemed like it could be explained in terms of a race condition. -- 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/dell-sputnik/+bug/954661/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
