This does not sound good:
Call failed
The EDID data should not be trusted as the VBE call failed
parse-edid: EDID checksum failed - data is corrupt. Continuing anyway.
parse-edid: first bytes don't match EDID version 1 header
parse-edid: do not trust output (if any).
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[rv200] initial mode is 1280x768 instead of preferred 1280x1024
https://bugs.launchpad.net/bugs/150709
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