Red Hat Bugzilla – Bug 421851
X server sometimes fails to start (no screens with usable config)
Last modified: 2009-01-09 02:31:49 EST
Occasionally, the X server will fail to start. When this happens, the following
error message appears in Xorg.0.log:
(EE) Screen(s) found, but none have a usable configuration.
I have seen this problem for a while now, with multiple versions of
xorg-x11-drv-ati. (Currently, I am using xorg-x11-drv-ati-6.7.196-4.fc8.)
This problem never occurs the very first time I launch the X server after a
reboot; it only appears if a previously ran an X server at some point since the
last reboot. It occurs only sporadically; it does not occur every time.
I do not use gdm; I boot into runlevel 3 and run startx manually to start the
server. Therefore, I do not know if this problem occurs when using gdm (in
I see this problem primarily on my laptop, which has a:
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon R250 [Mobility
FireGL 9000] (rev 01)
I *think* I have seen it on other boxes (with different Radeon cards), but I am
not completely sure about that. (The instances of encountering it on my laptop
are the only ones that stick out in my mind.)
Created attachment 286021 [details]
Xorg.0.log startup problem, with xorg.conf
Here's the X server log from a failed attempt to start. In this attempt, the
/etc/X11/xorg.conf file (as configured by system-config-display) is present.
Created attachment 286041 [details]
Xorg.0.log startup problem, without xorg.conf
Here's the X server log from another failed attempt to start. In this attempt,
I removed the /etc/X11/xorg.conf file (as configured by system-config-display)
and let the X server autodetect everything. However, the failure mode was the
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