First post here. Running Linux 5.4.0-89-generic with a Samsung 1920x1200 60hz Monitor.
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username:~$ cvt 1920 1200
# 1920x1200 59.88 Hz (CVT 2.30MA) hsync: 74.56 kHz; pclk: 193.25 MHz
Modeline "1920x1200_60.00" 193.25 1920 2056 2256 2592 1200 1203 1209 1245 -hsync +vsync
When I reboot my computer everything is fine.
When I power off my monitor I lose the resolution setting for 1920x1200 and it is not listed in the Display options.
I can only get the display back after reboot.
I've found a few articles that involve manually configuring a permanent display setting, but I've been unable to get this to work. viewtopic.php?t=274540
Here are the results from xrandr before monitor power turns off:
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Screen 0: minimum 320 x 200, current 1920 x 1200, maximum 8192 x 8192
VGA-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
DP-1 connected primary 1920x1200+0+0 (normal left inverted right x axis y axis) 518mm x 324mm
1920x1200 59.95*+
1920x1080 60.00 59.94
1680x1050 59.95
1600x900 60.00
1280x1024 60.02
1440x900 59.89
1280x800 59.81
1280x720 60.00 59.94
1024x768 60.00
800x600 60.32 56.25
640x480 60.00 59.94
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Screen 0: minimum 320 x 200, current 1600 x 900, maximum 8192 x 8192
VGA-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
DP-1 connected primary 1600x900+0+0 (normal left inverted right x axis y axis) 518mm x 324mm
1600x900 60.00*
1280x1024 60.02
1440x900 59.89
1280x800 59.81
1280x720 60.00 59.94
1024x768 60.00
800x600 60.32 56.25
640x480 60.00 59.94