Red Hat Bugzilla – Bug 122830
Config tool fail to handle changing to new graphics card
Last modified: 2007-11-30 17:10:42 EST
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Description of problem:
I first found a problem when I switched a hard disk containing an
FC2T3 install between two machines. Kudzu sorted out most the
differences between the machines, but X would not work and
system-config-display could not fix the config file, even though it
correctly detected the different graphics card.
I strongly suspect the same problem will occur when a user swaps
graphics card in a machine.
I have a simple way to reproduce as below...
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Get a machine with a working X system running
2. Shutdown X with "init 4"
3. Edit /etc/X11/xorg.conf, changing the "Driver" line to use a
different chipset, e.g. swap ati for i810 etc.
4. Confirm that X does not start, which is expected
5. Try running "system-config-display".
Actual Results: system-config-display detects the correct chipset to
use but ends up reporting an error that X could not start.
Looking at the /var/log/xorg.setup.log & the corresponding
/tmp/tmp...xorg.config file shows that system-config-display still
tried to use the old chipset.
Expected Results: I expect system-config-display should be able to
re-write the xorg.conf file to fix this problem.
Does /etc/X11/XF86Config still exist on your system?
Yes it did, so I just removed it and tried again but the problem still
I went to run level 3, editted /etc/X11/xorg.conf and changed the
driver from correct one "glint" to "ati" and then ran
system-config-display and it still failed:
[root@localhost X11]# system-config-display
* ddcprobe returned bogus values:
Trying with card: 3Dlabs Permedia2 (generic)
Error, cannot start X server.
If I delete the xorg.conf file containing the bogus driver info then
it works OK.
Please retest this appears to be fixed for me using Fedora Core 3 test
1 system-config-display 1.0.17-1
Steps to reproduce:
Change driver from ati to glint
It tries with config and then automatically tries using a fresh
configuration which works.