dnaKID

Glad to hear it, I guess most of the kudos goes to ChatGPT digging up this forum entry and applying it to our problem (and of course to @ledemon who posted the fix first). I only just checked where the bot got its information from, most of the time there's so much trial and error involved with troubleshooting that I hardly ever bother to look where the ideas came from, if the bot even lets me know. Anyway, hope this will fix it for most of us. I had been checking this thread here every time a new Unraid update hit only to see things hadn't really changed - let's hope this problem is gone for good now.

I couldn't use my GPU at all before this and now I can run Docker containers inside Bazzite that have access to my Intel Arc GPU and I can use Sunshine to stream Steam games to any device that can run Moonlight. So my remote desktop is working and I just tried playing a YouTube video, sound was passed through as well. Everything I could do with my Bazzite VM on 7.2.4 and that stopped working in later Unraid versions is now working again.

I've been having this problem on my Intel Arc A750 since trying to upgrade from 7.2.4 and it was driving me crazy. Gave it another swing today, asking ChatGPT to come up with ideas and "we" managed to fix it. Here's what it came up with (more info on my system below) : Shut down VM Edit > XML View Change the <domain> tag and add an entry before the final </domain> tag (see code below) Start VM and enjoy GPU passthrough Here's the code - At the very beginning I changed the <domain ...> tag to: <domain type='kvm' id='2' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>At the very end, just before the final </domain> tag, I added: <qemu:commandline> <qemu:arg value='-global'/> <qemu:arg value='pcie-root-port.mem-reserve=32M'/> </qemu:commandline> Some more info: My configuration: Unraid 7.3.3 (upgrading from 7.2.4) Intel Arc A750 (GPU and audio passed through) Bazzite Linux Q35 9.2 with OVMF GPU assigned to a dedicated PCIe root port After upgrading, the VM would boot, but the GPU failed to initialize properly. The Bazzite kernel logs showed PCIe BAR allocation errors: BAR 0: can't claim; no compatible bridge window BAR 0: can't assign; no space BAR 0: failed to assign The GPU required a 16 MiB non-prefetchable memory region, but the PCIe root port only had a 2 MiB memory window. After restarting the VM, the GPU's BAR 0 was successfully allocated at 0x82000000, the Intel i915 driver initialized correctly, and the GPU firmware loaded successfully. The initial can't claim message still appears, but Linux subsequently reallocates the BAR successfully. The can't assign; no space and failed to assign errors are gone. Everything appears to be working normally now, including GPU initialization, while retaining Q35.