I recently installed Ubuntu 20.04 LTS and as usual the option for display resolutions were only 1024x768 and 800x600. My monitor is AOC e943Fwsk which does not officially support 1920x1080. but I also have windows 10 installed on this computer and through Radeon software I can add custom resolutions, so I added 1920x1080 and it works. In the monitor setting menu in extra information it shows:
resolution: 1920(H)X1080(V)
H.Frequency: 68KHz
V.Frequency: 60Hz
Now the problem is when I try to set 1920x1080 resolution in ubuntu using xrandr my monitor says input not supported
. I don't understand why it works in windows but not in ubuntu. Maybe the modeline needs to be modified but I don't know what to modify in it.
After that that I tried to add 1600x900 and it works but in the monitor menu extra info it says:
resolution: 1440(H)X900(V)
H.Frequency: 56KHz
V.Frequency: 60Hz
but the resolution is 1600x900 in ubuntu.
I know this is the difference between Active Signal Resolution
and Desktop Resolution
which I know how to solve in windows but don't have any idea in ubuntu. But it's not the main problem. The problem is adding 1920x1080.
I am attaching custom resolution info in Radeon software and Windows setting.
Here is what I did:
$ cvt 1920 1080
output: # 1920x1080 59.96 Hz (CVT 2.07M9) hsync: 67.16 kHz; pclk: 173.00 MHz
Modeline "1920x1080_60.00" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync80
$ xrandr --newmode "1920x1080_60.00" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync
$ xrandr --addmode DVI-0 "1920x1080_60.00"
After that this resolution was added in settings so changed to it but input not supported
.
cvt
andxrandr
to add the custom resolution and the results of those commands. You say that maybe the modeline needs to be modified but you have not shown how you added your modeline so people cannot see what might be wrong or how to suggest a fix. – codlord Jun 20 '20 at 14:53