Re: Error detected 1 426, 260.19.06, loss of VDPAU v-sync on second monitor
mocharw, Can you please describe what causes MPlayer to crash in the first place; that will help us reproduce your problem.
Also, once MPlayer has crashed, does it actually exit the process, or is some failed process still hanging around by not working? If the MPlayer process is still running, this could cause the failure you're seeing. Perhaps try:
ps auxww|grep mplayer
after the crash and when you see the problem.