Comment 66 for bug 572521

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Bryce Harrington (bryce) wrote : Re: vertical coloured lines on bootup dell inspiron 1501

Given that the issue regressed between kernel versions 2.6.32-20 and 2.6.32-21 that really suggests it's a kernel bug, not X, especially since you see the corruption so early in the boot process (maybe before X has even started).

Like I mentioned, I would upstream this however you have to test the latest development version (maverick) first. If you are not interested in doing this, and just wish to get your system running, I would recommend using the technical support channels.