[Bug 3731] Re: Xorg resolution falling back to 640x480 and/or 800x600 when h/v freqs incorrect

Michal Suchanek hramrach at centrum.cz
Thu Apr 26 17:07:24 UTC 2007


I would like to add that X often does not detect the monitor either. In
some cases xresprobe or similar can read the monitor info but X cannot.
Sometimes it is the other way around. I suspect there are some marginal
setups that require several retries/longer timeouts than usual.

And there are several ways to read the info. One can usually query bios
or read the info from the monitor. Sometimes one way works and other
returns nothing or nonsense.

And reading the info is not always reliable. Even if the monitor is connected and turned on. 
I just started X about a dozen times, and once it came in 800x600 at 60. Just killing the server and starting a new one fixed the problem.

Some drivers in X do not rely on the info returned from the monitor. In
the ideal case a xorg.conf with no monitor settings should work.
However, some graphics card drivers require a special option to actually
use the information read from the monitor.

-- 
Xorg resolution falling back to 640x480 and/or 800x600 when h/v freqs incorrect
https://bugs.launchpad.net/bugs/3731
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