CentOS 7 - Wrong monitor detected

Issues related to hardware problems
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supmethods
Posts: 55
Joined: 2011/07/15 08:24:11

CentOS 7 - Wrong monitor detected

Post by supmethods » 2023/01/05 10:01:33

I have a CentOS 7 server which has a 22" Samsung Monitor attached to it. However, it is picking it up as HP 17" Monitor.

Here is the resolution I get for the HP 17" monitor:

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Screen 0: minimum 320 x 200, current 1280 x 960, maximum 4096 x 4096
VGA-1 connected primary 1280x960+0+0 (normal left inverted right x axis y axis) 340mm x 270mm
   1280x1024     60.02 +
   1280x960      60.00* 
   1024x768      60.00  
   800x600       60.32  
   640x480       59.94  
Parts of the desktop wasn't visible due to the resolution. I have managed to work around the problem by doing the following:

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    xrandr --newmode "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync
    xrandr --addmode VGA-1 1920x1080_60.00
Previously, the server had two physical display showing when connecting to NoMachine due to VNC server still running. I have stop and uninstalled VNC Server, and NoMachine now detects a single physical display.

I have tried restarting GNOME/X Server but it still picks up the monitor as being a HP.

How can I get CentOS 7 to automatically detect the monitor?

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