Bug 502493

Summary: Video playback leaves display blank, restarting X doesn't restore
Product: [Fedora] Fedora Reporter: Andy Burns <fedora>
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED DUPLICATE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: low    
Version: rawhideCC: itamar, kernel-maint, quintela
Target Milestone: ---   
Target Release: ---   
Hardware: i686   
OS: Linux   
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2009-05-30 08:28:16 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---
Description Flags
Xorg log file from before the problem
Xorg logfile attempting to restart X after the problem none

Description Andy Burns 2009-05-25 14:01:32 UTC
Running F11 latest rawhide, on machine with intel G35 graphics onboard, KMS with plymouth works.

Obviously I realise mythtv from ATRPMS isn't part of F11, but it seems to be tickling a bug in X or KMS.

Up to and including kernel-PAE mythtv worked fine, but since and there is a problem, when I start full screen TV playback the display goes black, but the machine is not hung.

Xorg process still exists, no errors to var/log/xorg.0.log or /var/log/messages or dmesg, can't kill it with CTRL-ALT-BKSP (I've re-enabled Zapping), can't switch to a different VT, can't connect using vino, even init 3 followed by kill Xorg followed by init 5 from an SSH session won't bring back the display, though it does try.

If I boot back to kernel it all works again.

xorg-x11-drv-intel.i586 is 2.7.0-6.fc11

intel_gpu_top shows

ring idle:   0%  ring space: 96/126976 (0%)
                          task  percent busy
            Projection and LOD: 100%
                   Bypass FIFO: 100%
              Color calculator: 100%
             Command Processor: 100%

I don't know if the output from intel_gpu_dump would help?

intel_stepping shows

Vendor: 0x8086, Device: 0x2982, Revision: 0x03 (E0)

Comment 1 Andy Burns 2009-05-25 14:06:02 UTC
Created attachment 345315 [details]
Xorg log file from before the problem

Comment 2 Andy Burns 2009-05-25 14:07:09 UTC
Created attachment 345316 [details]
Xorg logfile attempting to restart X after the problem

Comment 3 Andy Burns 2009-05-25 22:25:00 UTC
I have discovered that the X problem does not happen if I boot with "nomodeset" kernel parameter.

I will try to find if any other program apart from mythtv can produce the fault with KMS enabled.

Comment 4 Andy Burns 2009-05-30 08:28:16 UTC
Fixed by upgrading to


"Add intel-2.7-dont-vsync-xv.patch to disable Xv vsync, fixes hw
 lockup for full screen Xv (#499895)" sounds familiar.

Comment 5 Andy Burns 2009-05-30 08:40:03 UTC

*** This bug has been marked as a duplicate of bug 499895 ***