[ubuntu-za] Audio and video Problem Upgrade 9.04

[Bruno Marques]

hello all

i recently upgraded my ubuntu 8.10 to 9.04
and got greeted with 2 problems

1.the first one is regarding compiz, with ubuntu 8.10 i could use compiz 
and all the flashy effects without no problem, i used desktop cube, etc 
etc, even in the ubuntu visual effects, i can only select "None", i 
cannot choose "Normal" nor "Extra", wich i could before, it first says, 
searching for available drivers, after a while it says desktop effects 
could not be enabled.

is there any way to resolve this?

2. the second problem is, the pc was fine in terms of audio, i could 
hear everything without no problem, but, today after lunch my brother 
asked me if he could use the pc, after i got hold the pc after he got 
done with it... to my surprise i couldnt hear anything...

i've tried using diferent kinds of audio and video players, it all runs 
nicely as if the sound is coming out... but i dont hear anything,
the pc is not in mute, not even the laptop
s button for mute is turned on.. the volume on both the player and 
laptop are at full

is there a way to test if everything if fine with the audio? how can i 
toubleshoot this problem?
how can i be sure its a hardware problem or not?


many thanks in advance

Bruno Marques