Without further information about the GPU (as obtained from the output of "notify-level-glgsg debug") or an ability to reproduce the bug there's not much further we can do, so I'm setting this bug to expire if there is no further activity on this bug.
Without further information about the GPU (as obtained from the output of "notify-level-glgsg debug") or an ability to reproduce the bug there's not much further we can do, so I'm setting this bug to expire if there is no further activity on this bug.