Red Hat Bugzilla – Bug 399021
ati mobility radeon external monitor no display out of range
Last modified: 2009-01-09 02:29:02 EST
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Description of problem:
When booting fc8 with a laptop docked and the lid closed, connected to an external monitor, there is no display or with some monitors it shows "out of range", even though the monitor is correctly specified in xorg.conf. A comparison to fc6 and fc7 xorg.conf files confirms the configuration is correct (the fc6 and f7 both operate normally with external monitors).
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Install f8 on a laptop with an ATI mobility radeon, set the xorg.conf correctly to support the external resolution and frequencies.
2. Close lid on laptop and plug in external monitor.
3. Boot up and notice a blank screen after it switches on what would be the GUI.
Blank screen on the external monitor. If I hit <ctrl><alt><F2> I get a command prompt on the external display. If I then try to startx it tells me X is already running. If I hit <alt><F7> it goes back to a blank screen. It is strange that the command prompt works fine on the external monitor, but the GUI will not display.
The graphical mode should work on the external display. It should sense the lid is closed and there is a monitor on the external port, and it should switch to that port and resolution/frequencies.
I'm not sure if this is a bug with the radeon driver, or with xorg, or maybe something else, but it seems to me like this is driver related.
Please attach the X log from this configuration, so we can see why it's failing.
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.
Created attachment 270311 [details]
Log file with external monitor attached (Dell 2001FP).
Created attachment 270341 [details]
Log file without external monitor attached.
Created attachment 270351 [details]
xorg.conf automatically created after booting without one.
Ok, I have attached my current log files and xorg.conf. This xorg.conf was
created after I booted without one (did this a few days ago for
troubleshooting), but the log files are from booting with this auto-generated
xorg.conf, which I have not changed. Also, you may find the config files that
others are using on that linuxquestions.org link. Thanks!
Created attachment 277521 [details]
Xorg.0.log after booting with VG181b external monitor attached, laptop cover closed.
This is with a Viewsonic VG181b attached by VGA cable -- and it works fine.
This is with the same xorg.conf as before. I don't know why the Dell 2001FP
monitor will not work, but will work with FC6 & F7. Thanks.
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