Maybe this was fixed by this kernel commit?
commit 629598da932cfa5ff398fe10bc123282a6f3049e Author: Jesse Barnes <email address hidden> Date: Tue Oct 20 07:37:32 2009 +0900
drm/i915: update watermarks before enabling PLLs
Maybe this was fixed by this kernel commit?
commit 629598da932cfa5 ff398fe10bc1232 82a6f3049e
Author: Jesse Barnes <email address hidden>
Date: Tue Oct 20 07:37:32 2009 +0900
drm/i915: update watermarks before enabling PLLs