System locks up when running photon

I’ve got an x86 pc with a ps-2 mouse and keyboard. Console mode work fine but when I run photon, the mouse and keyboard lock up and I need to reset the system. Video card is 102b:0525 Matrox MGA G400. ph -s also hangs. I’m not sure how to proceed debugging this. Any ideas? This is a fresh cd install of 6.3.2.

I’ve a Matrox card and i can’t set other driver mode than vga 640x480.
does anyone have driver for this card?

There’s a config file you can set this in.