Sound and Graphics problems since upgrade

Hiya all

Just done upgrade from 11.0 kde 3.5.9 > 11.1 kde 3.5.10

since the upgrade now the soundcard is terrible its as if the bass and treble is turned full up ,its dead crackily and loud and distorted even when its turned up only by 25% never happed on my old install was perfect quality on there?? anybody know what i can check

2nd now when logging in for a few seconds the screen goes funny ,All snowy like a tv screen and then goes back to splash screen
This never happend in old install aswell?
any ideas wot else can be checked

Thanks People