Yesterday i installed 11.1 with kde. Then updated the system and KDE to 4.2.3. But today when i was using it. Suddenly screen goes white and no keys worked. I had to use power button to restart. After restart it happens again within 30 minutes. System is up to date. So i think, graphic driver will also be latest one. I have Intel 845 card.I have dual boot with XP, so now i am using XP to examine the issue. But it seems that the issue is with openSUSE just, not XP.
At the mean time, wireless net is also so slow and disconnecting after some interval of time. While in XP it is OK. Card is PCMCIA level one with Ralink chipest.
It was working fine on openSUSE 11.1 gnome b4. But this time every thing is not working properly.

Any ideas?
Thanks