I7-11700 QSV Build Problem

Builds [LGA1151,LGA1200] NAS Killer 6.0, Plex QSV Builds
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Hello all – I just recently put together a QSV HW transcoder using an i7-11700 (UHD750) on an ASUS B560M-A mobo, 32GB ram, and 512GB NVME drive with Ubuntu 20.04 LTS and Plex. I realize this is very much overkill, but I have some other plans for this build once I can wrap my head around the QSV issue. Got everything installed and, while the computer runs fantastically, I can’t seem to get the hardware transcoding working. I upgraded the kernel to 5.12 and 5.13 and still can’t seem to get HW transcoding working properly. I’m a newbie with Linux, so there’s a chance I’ve gunked something up.

I don’t even know where to start really. The tips I’ve found from various forums haven’t seemed to work. Does anyone have recommendations?

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What all have you done? And how are you confirming that it is not working?

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These are a few of the things I tried – having trouble remembering them all.

  1. Deleted the HD driver from /dev/dri leaving only the i915 driver
  2. Added “options i915 force_probe=4c8a” to /etc/modprobe.d/i915.conf
  3. Added "GRUB_CMDLINE_LINUX_DEFAULT=“quiet splash i915.force_probe=4c8a $vt_handoff” to /etc/default/grub (then update-grub)

lshw -c video reports the following:

*-display                 
       description: VGA compatible controller
       product: Intel Corporation
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       logical name: /dev/fb0
       version: 04
       width: 64 bits
       clock: 33MHz
       capabilities: pciexpress msi pm vga_controller bus_master cap_list fb
       configuration: depth=32 driver=i915 latency=0 mode=1920x1080 visual=truecolor xres=1920 yres=1080
       resources: iomemory:600-5ff iomemory:400-3ff irq:146 memory:6000000000-6000ffffff memory:4000000000-400fffffff ioport:4000(size=64) memory:c0000-dffff

When forcing a video to transcode in plex, I’m not getting the (hw) after the transcode message. Both hardware acceleration options are checked in Plex settings.

Any thoughts?

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How are you forcing a transcode?

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By changing the quality from Original/Maximum 1080p/30mbps to something smaller like 720p/4mbps or lower

image

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Do you have an active Plex Pass subscription?

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Yessir I do - tried signing out of everything and back in as well.

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Looking for any other ideas to try or guides to read. TIA

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You probably already figured it out, but I think the 11th gen cpus need the ubuntu 21 core. I think there are ways to upgrade 20 enough to get it working, but the easy fix is to install ubuntu 21. I havent built one yet just read the threads over at plex forums.

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Thanks Raize – In the end, I bit the bullet and just upgraded everything to 21.04 and it ran perfectly. Prior to that though, I tried upgrading 20.04 to different kernels 5.8, 5.10, 5.11, etc and things got wonky.

1 Like
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check the motherboard bios CPU support. Sometimes motherboards require the latest bios to support the newer CPUs.