NVRM: MMU Fault: ENGINE NVDEC HUBCLIENT_NVDEV faulted @ 0x0_00000000

[xtknight]

Mouse suddenly lags and OOM killer activated. This cleared up after a couple reboots, reinstalling vdpau libs, trying other hardware accelerated codecs and then VP9 again. VP9 then seems to work flawlessly for awhile. Unknown cause...hard to know if this is a bug internal to the NVIDIA VDPAU module or related to perhaps some surface code in VDPAU/VAAPI wrapper or VP9 code itself.

In dmesg, a couple messages appear similar to this:

NVRM: Xid (PCI:0000:00:06): 31, pid=2708, Ch 0000003d, intr 10000000. MMU Fault: ENGINE NVDEC HUBCLIENT_NVDEV faulted @ 0x0_00000000. Fault is of type FAULT_PDE ACCESS_TYPE_READ

[xtknight]

I think this is due to the structure unnecessarily having a prevIsKeyFrame field, as it only happened after trying the initial VP9 code with the invalid structure definition. Closing for now but will reopen if there are other issues. If you still have the same issue, feel free to file a new bug or comment.

https://lists.freedesktop.org/archives/vdpau/2019-July/000447.html