Comment 12 for bug 546769

Damn.
Subsystem Id: 0x104d4300

Will attach the file, but I suppose that means you'll want a new bug.
Nonetheless, the issue may have overlap, and clearly at least 2 of us on these sony vpc series found this value to be a solution (no response from original reporter on whether he tried it too).

Sooo, I hope you can still provide a patch file.