DELL XPS OLED black screen after dimming

[Wojtek Waga]

If brightness on Dell XPS 9510 with OLED screen is set to 0 screen goes black and the only way to get it back is to close and reopen the lid. Changing to console, pressing brightness up will not work. The same happens when screen gets dimmed after inactivity.

Here you can find brightness details after pressing brightness down 3 times (to black screen) all works good:

$ cat /sys/class/backlight/intel_backlight/*brig*
77
77
512
$ cat /sys/class/backlight/intel_backlight/*brig*
51
51
512
$ cat /sys/class/backlight/intel_backlight/*brig*
26
26
512
$ cat /sys/class/backlight/intel_backlight/*brig*
0
0
512

# here screen is totallt black
# now I press brightness up twice, values are good but screen remains black

$ cat /sys/class/backlight/intel_backlight/*brig*
51
51
512
$ cat /sys/class/backlight/intel_backlight/*brig*
128
128
512

# here no image, but closing and reopening the lid gets image back at brightness 128 like nothing ever happened.

[Ubuntu Foundations Team Bug Bot (crichton)]

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 interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Libera.chat.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1977799/+editstatus and add the package name in the text box next to the word Package.

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