RxBradPlex seems to be randomly & unpredictably falling back to software transcoding for the last day or two... I think it's an HDR thing? (And unfortunately, almost all of my stuff is HDR.)
Manually rolled Plex back to 1.43.0.10492-121068a07 via the .deb, and I'm able to enable HDR Tonemapping again without breaking 11th Gen Intel HW transcoding to SDR Google TV streamers.
So, it looks like v.1.43.1.10540-3972d551c breaks HDR Tonemapping. (I thought I was pulling that it from the Plex apt repo, but it was apparently from the TTeck autoupdate script. So I disabled that.)
https://www.plex.tv/media-server-downloads/?cat=computer&plat=linux
Miroslav Stankic@RxBrad Is this relevant?
@RxBrad GPU detected properly?
@pax0707 I think so? It randomly works, then stops working. Not sure if it was the updated ProxMox Kernel from updating a few days ago, or the latest Plex version. Or the new Plex repo?
Mar 21, 2026 11:58:11.386 INFO - Preparing driver icrl for GPU Intel TigerLake-LP GT2 [Iris Xe Graphics]
Mar 21, 2026 11:58:11.386 INFO - Preparing driver imd for GPU Intel TigerLake-LP GT2 [Iris Xe Graphics]
Mar 21, 2026 11:58:11.503 ERROR - [AVHWDeviceContext @ 0x7fedd1ec0c80] Failed to get number of OpenCL platforms: -1001.
Mar 21, 2026 11:58:11.503 ERROR - [Parsed_hwmap_2 @ 0x7fedcef37980] Failed to created derived device context: -19.
Mar 21, 2026 11:58:11.503 ERROR - [Parsed_hwmap_2 @ 0x7fedcef37980] Failed to configure output pad on Parsed_hwmap_2
Mar 21, 2026 11:58:11.504 ERROR - [fc#0 @ 0x7fede18b8180] Error reinitializing filters!
Mar 21, 2026 11:58:11.504 ERROR - Failed to inject frame into filter network: No such device
Mar 21, 2026 11:58:11.504 ERROR - Error while filtering: No such device
Mar 21, 2026 11:58:11.510 ERROR - [out#0/stream_segment,ssegment @ 0x7fedddaa7580] Nothing was written into output file, because at least one of its streams received no packets.
@pax0707 @rusty1281 Fired up the same movie in Chrome and HW transcoding spins up just fine...
Maybe the Android client is jacked? The fails I've seen so far are from a Google Streamer & Chromecast.
@pax0707 @rusty1281 Disabling HDR Tonemapping in Plex appears to fix it. Not sure how terrible stuff will look on non-HDR TVs. Minecraft seems OK on my kitchen TV's Chromecast.
@RxBrad @rusty1281 could be android client issue.
I live in a orchard and never had those issues.
Luka Manestar@RxBrad Can't say that I have had any similar issues on any of the plex servers. Currently running the latest beta on all of them.
@rusty1281 My suspicion is that updating the Proxmox kernel yesterday might've broken HDR tonemapping in my Plex LXC or something...
@rusty1281 @RxBrad same.
If it breaks it usually breaks for everything and it’s mostly related to updates breaking video drivers.
@pax0707 @rusty1281 It seems that the Plex beta release in question isn't playing nice with QuickSync.
Added my issue to the pile...
https://forums.plex.tv/t/hardware-gpu-quicksync-transcoding-broken-on-beta-1-43-1-10540/937145
Hardware/GPU/Quicksync transcoding broken on Beta 1.43.1.10540
Server Version#: 1.43.1.10540 Player Version#: After updating to the last beta version, version 1.43.1.10540 , GPU (hardware) transcoding no longer worked for me. I am on unraid, running Hotio docker container running on a Intel® Core™ Ultra 7 265K with build in IGPU with quicksync. When I rollback to the last stable version, everything works fine. I enabled debug and trace logs, and found this entry: [Req#5a3d58/Transcode/8da8b6f6-eb8d-4ef3-92e9-bf370e3e7e63] TPU: hardware transcoding: ena...