Describe the issue, or at least confirm if it is a similar screen freeze. Describe the actual setup, how is the second display configured? Is it an extended desktop? Which is the primary, what image?
Attaching your Xorg.0.log and dmesg (preferrably with drm.debug=6) in the failing config is always vital. Once you have an accurate description of the problem it would be best to file a new bug so that it is no longer confused with the broken HSW vsync.
Describe the issue, or at least confirm if it is a similar screen freeze. Describe the actual setup, how is the second display configured? Is it an extended desktop? Which is the primary, what image?
Attaching your Xorg.0.log and dmesg (preferrably with drm.debug=6) in the failing config is always vital. Once you have an accurate description of the problem it would be best to file a new bug so that it is no longer confused with the broken HSW vsync.