Quicksync HW Transcoder crashing Ubuntu Server

Plex Media Server
1

Server Version#: 1.21.1.3830
Player Version#: NA
OS: Ubuntu 20.04
CPU: Intel Pentium G4600

I currently run Plex in a docker container and every time an HW transcode is launched the entire server crashes and needs a reboot.
The actual transcode starts and I get GPU utilization in intel_gpu_top.

I’ve followed the directions from this thread and by what I can tell am using the i965 driver but still the crashes keep happening.

Log files attached (Plex Media Server.1.log to see the transcode-induced crash)

(File removed)

Note: Disabling hardware-accelerated video encoding seems to stop the crashes.

2

Check the status of your HDR settings.

I’m not sure how how well a P4600 will work with that.

It may be attempting HW HDR when it shouldn’t.
( – strike that – It’s a KabyLake GPU so should be ok . This will need the transcoder team to look at ) – OR – it’s the darn Ubuntu 16.04 ethernet driver come back to haunt (there have been a lot of regressions with Ubuntu 20.04 lately )

3

I did some more digging and found this.

Seems to be a power management problem with Pentium CPUs.
Adding the intel_idle.max_cstate=1 i915.enable_dc=0 kernel parameters seems to have solved my problem!

i915.enable_dc=0 to disable the GPU power management.
intel_idle.max_cstate=1 to limit the processor sleep states.

I’ll be testing with more concurrent transcodes but for now it seems stable.

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