Hi,

I'm running DOSBox 0.74 on FreeBSD 8.2. After starting DOSBox I get some weird graphical errors on the screen: short horizontal lines appear for less than a second, scattered on the whole screen. About 5 to 20 seconds later the screen turns black (dunno whether the monitor turns off) and after 2 seconds my desktop is back and it starts again. It happens in window and fullscreen mode.

I guess DOSBox uses a frequency my monitor (Acer S221HQLBD) can't handle. Any suggestions?