Public bug reported:
Dell XPS 15 9570
Linux 5.4.0-18-generic #22-Ubuntu SMP Sat Mar 7 18:13:06 UTC 2020 x86_64 x86_64
x86_64 GNU/Linux
ProblemType: KernelOops
DistroRelease: Ubuntu 20.04
Package: linux-image-5.4.0-18-generic 5.4.0-18.22
ProcVersionSignature: Ubuntu 5.4.0-18.22-generic 5.4.24
Una
I upgraded to 5.4.0-18-generic and the problem is now fixed. Both screen
backlight and keyboard backlight controls are now working as expected.
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https://bugs.launchpad.net/bug
Similar problem here.
Dell XPS 9570
Ubuntu 20.04
Unable to change screen brightness at all, either using function keys or
settings.
Keyboard backlight brightness works as expected.
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This occurred right after I upgraded to 18.10 from 18.04.1.
Earlier today I got an apt upgrade to kernel 4.18.0-9-generic.
The machine is much more stable now.
I can't test further at the moment.
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Public bug reported:
Dell XPS 15 9570
ProblemType: KernelOops
DistroRelease: Ubuntu 18.10
Package: linux-image-4.18.0-8-generic 4.18.0-8.9
ProcVersionSignature: Ubuntu 4.18.0-8.9-generic 4.18.7
Uname: Linux 4.18.0-8-generic x86_64
Annotation: Your system might become unstable now and might need t
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