DMA issues would be my guess
from the fact that it does work, but jumps, I'd guess that SuSE hasn't been nice and set up DMA properly for that drive for you :( If you're running a cpu monitor, you might notice it filling right up while you're trying to play DVDs.
One way to fix this is to use hdparm - try something like
"hdparm -d1 -x69 -c1 /dev/dvd", although you might need to replace /dev/dvd with /dev/hda, hdb, hdc or hdd (depending on whether your dvd drive is the IDE primary master, slave, secondary master or slave) if suse hasn't put the symlink in.
Also, you might want to check your motherboard manufacturer has released linux drivers (if it's a board based on a VIA chipset, like mine, then the answer is yes) - it might be worth trying them.
Good luck champ