Comment 1 for bug 366058

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Ron B. (flybye882001) wrote :

Looking at some google- results I find:-
To install Ubuntu 9.04 on the HP550 go to bios and disable "SATA Native Mode" - do normal Jaunty install - then go back to bios
and re-enable the "SATA Native Mode."

(I have no way to check this but perhaps it is worth a try/soloution for your problem.)