Sudden speed up problem

[MtothaJ]

Anyone encountered this?
Playing a game, everything is going fine and all of a sudden the game speeds up to hyper-turbo speed - only closing and restarting fixes this (until the next time this occurs).
I am using Groovymame with Asio and have been having this problem in multiple games lately at random - any ideas?

[burn_654]

Check that none of your joystick buttons are set as Ins or F10? Those are the mame throttle keys.

(obviously this would depend what joystick interface you're using.)

Is multi-threading enabled in mame.ini?

[intealls]

Please post your ini, a log created with -v when the problem appears, and your machine specs.