Well, I have already looked into drivers, and sound cards whatnot, but what happens to me is this; sometimes sound wants to play, sometimes it does not! Not via speakers, not via headphones-nothing! I am unsure of what causes this problem, but it is a reoccurring issue through the versions of Kubuntu I run. I do not see any noteable symptoms about this, it is completely random! I have tested it on fresh installs and modified versions and I get the same problem, which annoys me. If updated Flash, tried youtube, tried various video players-the lot! Any help would be appreciated, thanks!