Comment 21 for bug 722806

For a reference: https://lkml.org/lkml/2011/6/21/244 and a discussion in a thread which follows.

The following comment introduces that patch on LKML:

Some integrated ATI Radeon chipset implementations
(e. g. Asus M2A-VM HDMI) indicate the availability
of a DDC even when there's no monitor connected.
In this case, drm_get_edid and drm_edid_block_valid
periodically dump data and kernel errors into system
log files and onto terminals, which lead to an unacceptable
system behaviour.