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Configure Xorg for AST2500 max resolution of 1920x1200 on Ubuntu Server 19.10

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MPC7500:

--- Quote from: jirka on April 26, 2020, 06:10:55 am ---It worked until yesterday update (but I think that the Fedora 31 updated just the kernel, not the Xorg?!).

Do you have similar experience?

--- End quote ---

What's the problem in detail? Does 1080 resolution work?

jirka:

--- Quote from: MPC7500 on April 26, 2020, 04:48:53 pm ---What's the problem in detail? Does 1080 resolution work?

--- End quote ---

Blank screen, monitor says "no signal". But 1080 works normally (I'm using it now). I had only the 1920x1200 in my Xorg configuration file soi I had to add the 1080 one to see at least something.
Now I have 1920x1080, 1920x1200, 1280x1024 configured (the 1920x are from Raptor Wiki) and I can go to 1280x1024 and back to 1920x1080 but when I trt the 1920x1200 the I got blank the abovementioned blank screen.

MPC7500:
You could use the cvt command to look if the 1200 modelines has changed.
Otherwise, the Xorg logfile would be useful.

jirka:
I'm sorry for late reply.

My X11 boot to 1920x1080 now. Then I have tried to changer resolution to 1280x1024 (it obviously worked) and then to 1920x1200 (blank screen).

The Xorg log file is (attached).

MPC7500:
What modelines gives you the cvt command?

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