Bug 395499 - Cannot change resolution after installing kernel 4.17
Summary: Cannot change resolution after installing kernel 4.17
Status: RESOLVED UPSTREAM
Alias: None
Product: KScreen
Classification: Plasma
Component: common (other bugs)
Version First Reported In: 5.13.0
Platform: Arch Linux Linux
: NOR normal
Target Milestone: ---
Assignee: Sebastian Kügler
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2018-06-16 18:42 UTC by algebro
Modified: 2022-11-08 20:18 UTC (History)
1 user (show)

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Description algebro 2018-06-16 18:42:55 UTC 
Running latest KDE plasma on Arch Linux on a Dell XPS 9560 laptop.

When I boot mainline kernel 4.17, I can no longer change the resolution for my laptop screen under System Settings->Displays. It's stuck at 4k, and if I click the dropdown and select 1920x1080 and hit apply, it just resets to 4k and nothing on the screen changes. I installed xorg-xrandr and was able to manually set the resolution using the xrandr command.

This problem does not occur when I boot the stock 4.16.13 kernel. Under 4.16 I can change the resolution in the Display settings as expected.
Comment 1 Nate Graham 2022-11-08 20:18:32 UTC 
Sounds like a kernel regression.