Comment 4 for bug 509273

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Pauli (paniemin) wrote : Re: [Lucid] KMS doesn't work properly with old Radeon cards

It would help if there would be kernel message log from original problem. Setting up netconsole to stream the kernel messages to 2nd machine is probably the easiest solution.

Screen corruption is different bug and most likely caused by problematic AGP transfers.

You can either set your card to PCI mode or disable download from screen accerlation from exa.

Both will affect performance quite a lot.