[mythtv-users] XVMC nvidia segfault

[Neil Sedger]

Hi all,

MythTV (always) segfaults when I try to playback recorded TV - or watch
live TV - with xvmc.
Here's output when I try to watch a recorded show:

-----------------------8<-----------------------------------------------

2006-03-22 02:46:34.940 TV: Attempting to change from None to
WatchingPreRecorded
0: start_time: 0.036 duration: 155.756
1: start_time: 0.029 duration: 155.723
stream: start_time: 0.321 duration: 1730.703 bitrate=5157 kb/s
2006-03-22 02:46:34.974 AFD: Opened codec 0x820ea90, id(MPEG2VIDEO)
type(Video)
2006-03-22 02:46:34.980 AFD: Opened codec 0x820f6b0, id(MP2) type(Audio)
0: start_time: 0.036 duration: 155.756
1: start_time: 0.029 duration: 155.723
stream: start_time: 0.321 duration: 1730.703 bitrate=5157 kb/s
X Error: BadRequest (invalid request code or no such operation) 1
   Major opcode:  146
   Minor opcode:  19
   Resource id:  0x11a
X Error: BadLength (poly request too large or internal Xlib length error) 16
   Major opcode:  146
   Minor opcode:  3
   Resource id:  0x11a
Segmentation fault

-----------------------8<-----------------------------------------------

MPlayer plays fine using xvmc - it plays MythTV's .nuv files ok, to a
noticeable improvement and lower CPU usage than without the xvmc options
(on my Celeron 500).


Software setup:
Fedora Core 3, originally installed as per Jarod's guide, various things
updated
(official) Kernel 2.6.11
xorg 6.8.1
nVidia binary drivers 7676 (as recommended for xvmc use in the 0.19
release notes)
MythTV 0.19 from atrpms

Hardware:
Celeron 500
ABit BP6 mobo (single proc for the moment)
512mb RAM
nVidia GeForce 4 MX
SBLive soundcard


Additional config info:

I have a 'manually cobbled together' dual head switching setup because I
have a 4:3 TV connected to SVIDEO and a 16:9 projector connected to VGA.
These are set up as separate X desktops - no xinerama or twinview. I
have scripts which switch the DISPLAY env. var and manually update the
GUI sizes (1280x720 or 720x576) in mysql before mythfrontend is started.
The VGA is always X display :0.0, I have been trying to get xvmc to work
on this first, then I'll check it works on 0:1 (TV). As I said above
mplayer works fine, fullscreen or windowed, using xvmc.



Any suggestions?


Cheers
Neil