Hi,
I'm deleting your long post. Your problem is not unique. If you can
establish what chipset your sound and video use, that would help.
Apparently this is not unknown with Dell laptops from that era. I found
your problem particularly interesting, and I happened to read a mailing
list post about it. Go to:
http://linuxgazette.net/current/
Go to the mailbag, then past the first post. The second talks about a
Dell laptop with similar issues to yours. Also try "lspci -vv" just in
case.
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