Comment 2 for bug 1388612

This is a bug in the Intel Mesa driver. Unfortunately I have little hope that it will be fixed soon: "This suggests that we're missing a flush somewhere... but finding where is like finding a needle in all the haystacks. :(" (https://bugs.freedesktop.org/show_bug.cgi?id=80568)

Anyways, as far as Ubuntu is concerned this seems to be the same as bug 1382673, bug 1385810 and bug 1394424.