Bug 1473839 - impossible to change screen resolution
impossible to change screen resolution
Status: NEW
Product: Fedora
Classification: Fedora
Component: plasma-workspace (Show other bugs)
x86_64 Linux
unspecified Severity unspecified
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Assigned To: KDE SIG
Fedora Extras Quality Assurance
Depends On:
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Reported: 2017-07-21 16:13 EDT by Stefan Seefeld
Modified: 2017-07-22 10:44 EDT (History)
9 users (show)

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Description Stefan Seefeld 2017-07-21 16:13:32 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...

How reproducible:


Steps to Reproduce:
1. Open the "System settings" dialog, 
2. Go to the "Display and Monitor" module,
3. Try to select a different resolution.

Actual results:

Expected results:

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.

Additional info:
Comment 1 Rex Dieter 2017-07-22 10:36:15 EDT
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.
Comment 2 Stefan Seefeld 2017-07-22 10:43:50 EDT
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
   3200x1800     59.98*+
   2048x1536     60.00  
   1920x1440     60.00  
   1856x1392     60.01  
   1792x1344     60.01  
   1600x1200     60.00  
   1400x1050     59.98  
   1280x1024     60.02  
   1280x960      60.00  
   1024x768      60.04    60.00  
   960x720       60.00  
   928x696       60.05  
   896x672       60.01  
   800x600       60.00    60.32    56.25  
   700x525       59.98  
   640x512       60.02  
   640x480       60.00    59.94  
   512x384       60.00  
   400x300       60.32    56.34  
   320x240       60.05  
HDMI-1 connected 1600x1200+0+0 (normal left inverted right x axis y axis) 367mm x 275mm
   1600x1200     60.00*+
   1280x1024     75.02    60.02  
   1152x864      75.00  
   1024x768      75.03    60.00  
   800x600       75.00    60.32  
   640x480       75.00    59.94  
   720x400       70.08  
DP-1 connected 1920x1200+1608+0 (normal left inverted right x axis y axis) 518mm x 324mm
   1920x1200     59.95*+
   1920x1080     60.00  
   1600x1200     60.00  
   1680x1050     59.95  
   1280x1024     60.02  
   1280x960      60.00  
   1024x768      60.00  
   800x600       60.32  
   640x480       59.94  
   720x400       70.08  
HDMI-2 disconnected (normal left inverted right x axis y axis)
Comment 3 Stefan Seefeld 2017-07-22 10:44:38 EDT
(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.)

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