Comment 30 for bug 351990

I've said before this issue doesn't seem to exist on my hardware but after a bit more testing I found it does exist, too.
But if I use Kubuntu and desktop effects only for konsole/yakuake, konqueror, kontact (kmail), plasma applets etc. kde4 apps is stable for me and I haven't experienced freeze (yet). I use my computer for few hours a day. But I can reproduce hangs by for example use k3b 1.0.5 (kde3 app) and for example tvtime for analog tv watching using xv at the same time (kdetv doesn't work in kubuntu 9.04 (regression in 9.04 after upgrade from 8.10 - described in bug #325874) but it occurs after some time and using dialogs in k3b. I've found that it occurs (I think) with gtk apps too on kubuntu (it happened to me just one time or maybe twice). It might be because of one of desktop effects plugins (one of the enabled by default). After hang I can still use sysrq (mostly).
Graphic card: Sapphire Radeon 9600 256MB AGP 8x (RV350).