https://bugs.freedesktop.org/show_bug.cgi?id=57842
--- Comment #2 from Roland Scheidegger sroland@vmware.com --- Created attachment 71014 --> https://bugs.freedesktop.org/attachment.cgi?id=71014&action=edit potential fixes for viewport trouble
I had something like this in mind. Untested though and all that viewport updating stuff seems really weird. I hope I didn't create circular calling chains... Might not fix this bug at all...