Please include your /var/log/Xorg.0.log.
Offhand, this sounds like the pipe-A problem. Try setting this option in your xorg.conf:
Section "Device" ... Option "ForceEnablePipeA" "true" EndSection
If that solves the issue let me know and I can put in a quirk for it.
Please include your /var/log/ Xorg.0. log.
Offhand, this sounds like the pipe-A problem. Try setting this option in your xorg.conf:
Section "Device"
...
Option "ForceEnablePipeA" "true"
EndSection
If that solves the issue let me know and I can put in a quirk for it.