HDMI glitching on new Plasma
I've just replaced a 1080p LCD monitor with a 1080p Plasma TV on my HTPC (F12/MythTV), and I'm getting glitching under certain conditions.
I have no problems during POST, bootsplash, or with the MythTV menu, but the display starts having issues when playing back video (Xv, OpenGL, and VDPAU). I get occasional horizontal lines, and large blocks of the current frame superimposed briefly in random locations. The glitches are accompanied with sound dropout (HDMI/LPCM on the same card).
If I pause playback I still get the glitches, so it's not a decoding/playback issue. After I stop playback and return to the menu, I may still see glitches for a few seconds.
I have the same issues with xine and xscreensaver, so it appears to be motion-related. None of the vsync options has any impact. Composite is disabled.
If I disconnect the new TV and connect the old LCD (with or without restarting X), it plays perfectly. When I switch back, it glitches again, so it doesn't appear EDID-related.
There are no problems with other sources on the TV (PS3/STB). Connecting via the PC input (D-SUB) also has no issues, but is limited to 1280x1024.
GPU: ECS GT220 1GB
Fedora 12 (x64)
Tested with drivers 190.42 through 195.36.15