Comment 41 for bug 77370

Something strange happened, later I installed Vista as I want all hardware drivers, then I found Vista was not convenient for me, so I reinstalled Ubuntu 9.04(with latest updates) and the problems gone, I recall that in Vista I flashed BIOS using the latest driver from HP(also, the version is F.0C), at the very beginning, I have Xp installed and I also flashed BIOS using F.0C, the only difference is I used BIOS for XP at that time, later in Vista I used BIOS for Vista, so I guess it fixed this problem, here is the link:

http://h20000.www2.hp.com/bizsupport/TechSupport/DriverDownload.jsp?lang=en&cc=au&prodNameId=3687647&taskId=135&prodTypeId=321957&prodSeriesId=3687644&lang=en&cc=au

it asks you to select operating system, and there are different BIOS updates for Vista and XP.