Bug 22764

Summary: radeon driver with r600 sometimes fails to properly activate external monitor
Product: xorg Reporter: Armin <armin>
Component: Driver/RadeonAssignee: xf86-video-ati maintainers <xorg-driver-ati>
Status: RESOLVED DUPLICATE QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium    
Version: 7.4 (2008.09)   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
xrandr --verbose output with working external monitor
none
xrandr --verbose output with non-working external monitor none

Description Armin 2009-07-14 06:37:49 UTC 
Created attachment 27681 [details]
xrandr --verbose output with working external monitor

I activate my external monitor with 
$ xrandr --output DVI-0 --off
$ xrandr --output HDMI-0 --auto --left-of LVDS
Every third or fourth time the monitor does either get no signal it can use at all, or it shows a garbled screen. It looks a bit like back in the days when the refresh frequency of an analog monitor was not ok. The only thing I can do to get a usable image is to reboot. Enabling and disabling of the output devices does not help.

I am completely lost, when it comes to debugging this. I will attach the "xrand --verbose" output of the working and non-working case, but I could find no major difference. You can find my config in bug 22744. Driver version is 6.12.2, Kernel 2.6.30.
Tell me if I can give you any further information.
Comment 1 Armin 2009-07-14 06:38:27 UTC 
Created attachment 27682 [details]
xrandr --verbose output with non-working external monitor
Comment 2 Alex Deucher 2009-07-14 07:51:11 UTC 
This is likely related to the lack of router object support.

*** This bug has been marked as a duplicate of bug 18564 ***
Comment 3 Armin 2009-07-14 08:09:24 UTC 
Ok, if you say so.
I just wonder why it works in the majority of cases and if it does not work the monitor still gets a signal, just a crappy one. In bug 18564 there seems to be no signal at all.

Anyway, I'm CCed to 18564 and if there is something new to test I will try to test it.

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