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#1 2023-09-22 21:12:52
- efstat
- Member
- Registered: 2023-09-11
- Posts: 25
Monitor resolution changes with xrandr but not with KDE's settings
I am running the latest LTS kernel (6.1.54) with KDE Plasma.
My monitor's native resolution is 3840x2400.
With the following command I can change the resolution to 1920x1200:
xrandr --output eDP-1 --mode 1920x200
However, when I use KDE's settings to change the resolution, all I see is a black screen. After 15-20 seconds, as I have not confirmed that the new resolution/settings is OK, the resolution reverts back to 3840x2400 and the desktop appears again.
How can I go about debugging this?
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#2 2023-09-22 22:06:36
- seth
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- From: Won't reply 2 private help req
- Registered: 2012-09-03
- Posts: 76,093
Re: Monitor resolution changes with xrandr but not with KDE's settings
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#3 2023-09-23 06:14:34
- efstat
- Member
- Registered: 2023-09-11
- Posts: 25
Re: Monitor resolution changes with xrandr but not with KDE's settings
We had this duscussion in the previous thread, but I believe this is a different issue 
I changed to Linux LTS so that I can change the resolution, but now:
I can successfully change the resolution with xrandr in Plasma/X11 but NOT with the Plasma monitor settings.
I can successfully change the resolution to the non-native one in GNOME/X11 with the Settings and with xrandr.
I can successfully change the resolution to the non-native one in LXqt/ with the Settings and with xrandr.
It seems it is purely a Plasma/Settings issue.
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#4 2023-09-23 06:33:41
- seth
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- From: Won't reply 2 private help req
- Registered: 2012-09-03
- Posts: 76,093
Re: Monitor resolution changes with xrandr but not with KDE's settings
Try to disable the compositor (SHIFT+Alt+F12) and post the output of "xrandr -q", kscreen seems to have a preference for interlaced modes…
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