Bug 25386

Summary: S-Video incorrectly detected on RV515
Product: xorg Reporter: Joakim Sindholt <opensource>
Component: Driver/RadeonAssignee: xf86-video-ati maintainers <xorg-driver-ati>
Status: RESOLVED NOTABUG QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium    
Version: unspecified   
Hardware: x86 (IA32)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
dump of /sys/bus/pci/devices/0000:01:00.0/rom
none
dmesg after a fair bit of running
none
dmesg when booted with drm.debug=1
none
lspci -vv
none
dmesg with drm.debug=1 and no X
none
lspci -vv as root none

Description Joakim Sindholt 2009-12-01 17:29:19 UTC 
When X starts it will incorrectly report that a monitor is connected through my Mobility Radeon X1400 (M54/RV515) S-Video port, even though no cable is in the port. This then causes GDM at least, to select the best common mode between the LVDS and S-Video, which happens to be 1024x768, thus showing a stretched and blurry picture on the LVDS.

This happened for the first time on the Fedora 12 live-cd. Approximately 1 or 2 weeks prior to the F12 release I had used Rawhide with no such bug.

Reproducibility:
Every time

Steps to reproduce:
Start the F12 live-cd or any F12 installation on the appropriate card.

I have attached the VBIOS for my card on recommendation of airlied. Hope this helps and thank you in advance.
Comment 1 Joakim Sindholt 2009-12-01 17:34:50 UTC 
Created attachment 31643 [details]
dump of /sys/bus/pci/devices/0000:01:00.0/rom
Comment 2 Joakim Sindholt 2009-12-01 17:45:59 UTC 
Created attachment 31644 [details]
dmesg after a fair bit of running
Comment 3 Joakim Sindholt 2009-12-01 17:53:56 UTC 
Created attachment 31645 [details]
dmesg when booted with drm.debug=1
Comment 4 Joakim Sindholt 2009-12-01 17:54:31 UTC 
Created attachment 31646 [details]
lspci -vv
Comment 5 Joakim Sindholt 2009-12-01 18:03:03 UTC 
Created attachment 31647 [details]
dmesg with drm.debug=1 and no X
Comment 6 Joakim Sindholt 2009-12-01 18:03:36 UTC 
Created attachment 31648 [details]
lspci -vv as root
Comment 7 Joakim Sindholt 2010-04-25 05:13:41 UTC 
The output of the S-Video port is garbage. The VGA port also outputs garbage, but seemingly works at random.
This bug still persists on the Fedora 13 BETA LiveDVD
Comment 8 Alex Deucher 2010-10-19 18:50:09 UTC 
tv-out load detection is very often unreliable.

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.