I have an old HP dc5000 SFF and I updated the BIOS from 1.00 to 1.43. Before that update, I install Ubuntu 11.04 Natty Narwhal and flickering and tearing occurs everywhere. So I reinstalled Windows ...
My internal speaker was working before I updated(including new kernel) a few days ago. Now it seems that my internal speaker is muted and only external speakers are working . I am using ubuntu 10.10 ...