Xfce Forum

quantamm

Member

Registered: 2023-05-31

Posts: 2

Monitor resolution incorrect after monitor goes to sleep

I'm running OpenSUSE Tumbleweed with XFCE 4.18 and I'm using X11. I have an Nvidia RTX 2080 with Nvidia's drivers. I just bought a Samsung Neo G9 ultrawide which has a native resolution of 5120x1440. When the system starts, the resolution is correct, but while running, if the monitor is turned off (either by power management, or by hitting the power button), when it comes back up, XFCE is running at 3840x1080. I can change it back, but it's annoying having to do it every time.

I'm upgrading from a Samsung G9 (non-Neo, same native resolution) and it didn't have this problem, so there's something about this monitor that's causing this.

In the XFCE display settings, "3840x1080" has a star next to it. Xrandr shows this:

# xrandr
Screen 0: minimum 8 x 8, current 5120 x 1440, maximum 32767 x 32767
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-0 disconnected (normal left inverted right x axis y axis)
DP-2 connected 5120x1440+0+0 (normal left inverted right x axis y axis) 1mm x 1mm
   3840x1080     59.97 + 119.97  
   5120x1440    120.00*   59.98  
   3840x2160     59.94    50.00  
   3440x1440    120.00    59.97  
   2560x1440    120.00    59.95  
   1920x1080    119.88    60.00    59.94    50.00  
   1680x1050     59.95  
   1600x900      60.00  
   1440x900      59.89  
   1280x1024     75.02    60.02  
   1280x800      59.81  
   1280x720      60.00    59.94    50.00  
   1152x864      75.00  
   1024x768      75.03    70.07    60.00  
   800x600       75.00    72.19    60.32    56.25  
   720x576       50.00  
   720x480       59.94  
   640x480       75.00    72.81    59.94  
DP-3 disconnected (normal left inverted right x axis y axis)
DP-4 disconnected (normal left inverted right x axis y axis)
DP-5 disconnected (normal left inverted right x axis y axis)
USB-C-0 disconnected (normal left inverted right x axis y axis)

I suspect that the monitor is reporting the incorrect resolution when it's first turned on. I've tried forcing one particular mode using /etc/X11/xorg.conf. I've also following Nvidia's instructions for forcing a particular EDID.

This is a desktop configuration and I never change my monitor configuration, so if I could disable all autodetection and just use a fixed resolution, that would be a fine workaround.

quantamm

Member

Registered: 2023-05-31

Posts: 2

Re: Monitor resolution incorrect after monitor goes to sleep

I worked around the issue by going to the Advanced tab of the Display settings and creating a profile and selecting "Automatically enable profiles when new display is connected."

Since making this change, I haven't had the resolution issue again.