Red Hat Bugzilla – Bug 78213
rh-cfg-xf86 fails to identify monitor post-install
Last modified: 2008-05-01 11:38:04 EDT
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User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.2b) Gecko/20021028
Description of problem:
Redhat-config-xfree86 does not identify Apple Studio display when run manually.
At install time, Monitor is correctly identified and setup, so what is different
in the code as to render this monitor unidentifiable in a post-install
configuration? Appears not to be in the redhat-config-xfree86 database, although
it is indentified when first installed. Makes changing graphics cards a real
pain. Have to switch monitors to get useful display - then switch back.
Redhat-config-xfree86 reports a DDF probe failure - cannot identify monitor, and
thus cannot run X server. Probe fails.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Switch graphics card on Linux System (8.0) using Apple Studio Display monitor
that was configured correctly during intial install.
2. Attempt to restart either by init 5 or startx from init 3
3. X server fails.
4. Attempt to run redhat-config-xfree86 as root
5. Probe fails to return any usable values.
6. Then have to switch monitors to probe for a recognized monitor.
7. When correctly setup - shutdown and halt machine.
8. Re-attach Apple display with usable X configuration - and it works.
Actual Results: The monitor now works.
Expected Results: The Apple Studio Display should be recognized as it is during
intitial configuration and setup. That probe correctly identifies the monitor.
You cannot choose the Apple Studio (or any Apple monitor for that matter)
Display when manually attempting to do this in redhat-config-xfree86 either.
It would seem fairly simple to ensure that the hardware could correctly be
probed post-install if it works during intitial setup.
Yes. That's strange.
msf: Do you know if anaconda does its DDC probe differently somehow?
ctalk, can you attach your /etc/X11/XF86Config file?
ctalk: I saw the file that you sent in an email, but I was hoping to get the
XF86Config that anaconda wrote out. Sorry that I didn't make that clear. It's
hard to say at this point what the problem is.
What does the output of '/usr/bin/ddcprobe' (must run as root) say?
Closing due to lack of information.