Just what the topic says. I'm using Wah!cade, though I've tested it straight from the command line and the same thing happens. Sometimes it'll be a minute into a game, sometimes it'll be 10, but at some point the sound always completely cuts out. I've tried searching around, but everything I'm finding is either mame related (not xmame) or extremely ancient.
The command I'm running, with all arguments, is:
xmame -jt 1 -jdev /dev/input/js0 -fullscreen -vidmod 1 [game]
I'm still sort of new at Linux, though I know my way around a bash shell just fine. Any suggestions?