[mythtv-commits] Ticket #6561: video sync using DRM vblank on VIA cn400 hardware is broken starting with the 2.6.28 kernel.
MythTV
mythtv at cvs.mythtv.org
Tue May 19 14:59:33 UTC 2009
#6561: video sync using DRM vblank on VIA cn400 hardware is broken starting with
the 2.6.28 kernel.
-------------------------------------+--------------------------------------
Reporter: pebender at san.rr.com | Owner: ijr
Type: defect | Status: new
Priority: minor | Milestone: unknown
Component: MythTV - Video Playback | Version: 0.21-fixes
Severity: low | Mlocked: 0
-------------------------------------+--------------------------------------
It appears that changes in the DRM code introduced in the 2.6.28 kernel
broke video sync using DRM vblank on VIA cn400 hardware. By default, with
the 2.6.28.10, 2.6.29.3 and 2.6.30-rc6 kernels, video playback on my VIA
SP8000E is completely unwatchable due to stutters and stalls. However, if
I disable the use of DRM vblank either by renaming /dev/dri/card0 (using
udev rules) or by commenting out the DRM video sync test in
mythtv/libs/libmythtv/vsync.cpp, then MythTV uses usleep and everything
works fine.
--
Ticket URL: <http://svn.mythtv.org/trac/ticket/6561>
MythTV <http://www.mythtv.org/>
MythTV
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