Red Hat Bugzilla – Bug 455552
xorg hangs on startup
Last modified: 2009-07-14 13:32:39 EDT
Description of problem:
I just installed FC9 and xorg hangs on startup.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Boot the computer into runlevel 5 or telinit 5
2. Watch X hang (100% CPU usage by Xorg)
Actual results: Hang, no X comes up.
Expected results: X works.
I have a Radeon 9000 graphics card. Some experimentation shows that disabling
DRI for the driver allows X to start without hanging... but of course without
DRI, which is quite suboptimal.
I tried to profile to see whether I could get any info on the hang, but even
with all the relevant X debuginfo packages installed I didn't get much. sysprof
says that all the time is spent in the kernel, called from X.
If there is any more information that I can provide that would help resolve
this, I would be very happy to do so in the next two days. After that I won't
have access to this machine for three weeks.
The point of installing Fedora Core on this machine was to do some graphics
performance testing on Firefox, so this bug is basically making the computer
useless to me for its intended purpose...
is this an AGP box? please try adding Option "AGPMode" "1" or Option "BusType"
"PCI" to the xorg.conf
Thanks for the bug report. We have reviewed the information you have provided
above, and there is some additional information we require that will be helpful
in our diagnosis of this issue.
Please attach your X server config file (/etc/X11/xorg.conf) and X server log
file (/var/log/Xorg.*.log) to the bug report as individual uncompressed file
attachments using the bugzilla file attachment link below.
Could you please also try to run without any /etc/X11/xorg.conf whatsoever and
let X11 autodetect your display and video card? Attach to this bug
/var/log/Xorg.0.log from this attempt as well, please.
We will review this issue again once you've had a chance to attach this information.
Thanks in advance.
Yeah, this is an AGP box. Setting AGPMode to 1 or 2, or setting BusType to PCI
does in fact make the problem go away. Setting AGPMode to 4 makes it reappear.
The default if I don't set anything is 4, looks like. The X server log from
when things don't work has:
(==) RADEON(0): Using AGP 4x
4x AGP is enabled in the BIOS.
What's odd is that my previous install (FC 4, to be exact) worked with this same
setup. Perhaps it didn't try to use 4x AGP?
Created attachment 311954 [details]
xorg.conf that shows the problem (with the manual 4x agp setting, but commenting that line out uses 4x by default)
Created attachment 311955 [details]
Created attachment 311956 [details]
Log from running without an xorg.conf: also reproduces the bug
With AGPMode set to 2, X starts, but everything dies as soon as I start emacs.
With AGPMode set to 1, things seem to be OK.
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