Red Hat Bugzilla – Bug 115974
can't probe monitor on Dell Latitude CPx laptop
Last modified: 2007-11-30 17:10:36 EST
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User-Agent: Mozilla/5.0 (X11; U; Linux i686; fr-FR; rv:1.6) Gecko/20040113
Description of problem:
The installation process is unable to probe the monitor of a Dell
Latitude CPx laptop.
The video card is an ATI Technologies Inc Rage Mobility P/M AGP 2x.
The monitor is a 1024x768 TFT display. Details here:
Version-Release number of selected component (if applicable):
# system-config-xfree86 --reconfig
* ddcprobe returned bogus values:
Trying with card: ATI Rage Mobility
That's not part of XFree86.
Does system-config-display actually start at all?
Yes, it starts without problem. It just can't recognize the monitor.
Ok, good. Some LCDs (especially some older laptops) don't have the
ability to be ddcprobed. Since there's no way to tell what kind of
monitor it is, we try to use some generally safe sync rates so that
the program will start.
Then you can go into the Monitor dialog and select the correct model.
Other than that, there's nothing we can do to fix the problem since
we can't get any probing information from the hardware.
Ah, OK. I seem to recall this used to work with Red Hat Linux 9, which
is why I've reported the bug. However I'm not 100% sure about that, I
could be wrong. If you think the problem is that the monitor is not
DDC capable, there's indeed no point in looking into this.
Dimitri: could you attach your X server log?
Created attachment 97860 [details]
mmmh.. DDC is supported supposedly supported, but the DDC read fails for
XFree86 as well:
(II) ATI(0): VESA VBE DDC supported
(II) ATI(0): VESA VBE DDC Level none
(II) ATI(0): VESA VBE DDC transfer in appr. 2 sec.
(II) ATI(0): VESA VBE DDC read failed