I can confirm this bug: When configuring for dual head my Xorg.0.log grows with the same error messages. Manually installing the most recent official fglrx driver (8.476) does not fix it nor does adding ForceMonitors=nocv.
I can confirm this bug: When configuring for dual head my Xorg.0.log grows with the same error messages. Manually installing the most recent official fglrx driver (8.476) does not fix it nor does adding ForceMonitors=nocv.