For problem 1:
Make sure that you have a line like:
- Code: Select all
/dev/sda1 /mnt/multimedia ext4 defaults 1 2
in your /etc/fstab file. If the filesystem for your /dev/sda1 is not ext4, replace it with whatever is necessary (ext3, ntfs-3g,...) (I would recommend ntfs-3g instead of ntfs - ntfs will mount it as readonly).
I got nothing on problem 2... probably should have posted those separately. I have a 8500 nvidia myself, but I use KDE 4 instead of compiz...