Comment 29 for bug 745112

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Bryce Harrington (bryce) wrote : Re: [arrandale] desktop is messed up (goes black) when laptop is docked with two external 1920x1200 monitors (x86_64)

An alternative thing to investigate: There is another bug particular to Sandybridge, with roughly similar symptoms to this one, which has already been git bisected and found a candidate patch. The flagged patch with the fix appears to also affect Arrandale, so I have a hunch it *might* also solve this bug. But that's just a wild guess. Please install and boot this kernel to see if the issue can be reproduced; if not, then this bug may be a dupe of bug #761065:

http://people.canonical.com/~acelan/bugs/lp753189/