Couldn't get it to crash with valgrind. Bisect not 100% sure as it seemed to get harder to provoke going back in time, but it does seem to need temporal deint and I got - first bad commit: [d0d5f7600c2e8ab8d0c153787185f7a534753edd] Revert "st/vdpau: use linear layout for output surfaces The revert reverts from current head, so I will test for a while like that.