Red Hat Bugzilla – Bug 1473839
impossible to change screen resolution
Last modified: 2017-07-22 10:44:38 EDT
Description of problem:
Since a little while (i.e., for at least a few releases), the choice in display resolutions in the "display - system settings" dialog have been very limited. In fact, for my laptop (Dell xps 15), which is capable of a 3840 x 2160 resolution, I only see "3200x1800" as the only choice for the given aspect ratio. All other choices correspond to the more traditional aspect ratio, and thus would leave wide margins.
Version-Release number of selected component (if applicable):
(I'm not convinced kdeadmin is responsible for this, though it is the package providing the GUI for these settings (I believe). The actual limitation may come from the actual video driver...
Steps to Reproduce:
1. Open the "System settings" dialog,
2. Go to the "Display and Monitor" module,
3. Try to select a different resolution.
A wider selection of applicable resolutions (i.e., matching the physical aspect ratio). In previous releases there were at least four or five of them.
What does output from command line:
say? that should be the same that is offered by plasma.
If xrandr does not display what you expect, the problem lies elsewhere.
The output is
Screen 0: minimum 320 x 200, current 3528 x 3000, maximum 8192 x 8192
eDP-1 connected primary 3200x1800+0+1200 (normal left inverted right x axis y axis) 346mm x 194mm
1024x768 60.04 60.00
800x600 60.00 60.32 56.25
640x480 60.00 59.94
400x300 60.32 56.34
HDMI-1 connected 1600x1200+0+0 (normal left inverted right x axis y axis) 367mm x 275mm
1280x1024 75.02 60.02
1024x768 75.03 60.00
800x600 75.00 60.32
640x480 75.00 59.94
DP-1 connected 1920x1200+1608+0 (normal left inverted right x axis y axis) 518mm x 324mm
HDMI-2 disconnected (normal left inverted right x axis y axis)
(By the way, I'm observing other bugs, related to my three-display setup. The one I'm reporting here, though, is the most pressing.)