Kernel crashes randomly when passthru 7840HS iGPU to win11 guest

[jerrita]

Hi there, I have a 7840HS machine and installed PVE 8.1 latest with the kernel 6.5.11-8-pve.

But every time the windows guest boots, the host will crash and reboot randomly. I can't get more information cause when I enabling `kdump-tools`, it will crash definitely and even don't reboot thus I can get nothing from `/var/log/crash`. The only useful information is the following dmesg during each time the win11 boot.

logs: https://sc.ka5umi.eu.org/HKd5s

I think it may be fixed by linux 6.7+, while I cannot find some useful information for kernel build with the latest linux kernel. I tried using `Ubuntu-6.7.0-3.3` from the official ubuntu and `zfs-2.2.3-staging` from pkg-zfs. After that, simply use:

cp build/fwlist-6.7.2-1-pve.sorted build/fwlist-previous
cp build/fwlist-previous fwlist-previous

And it will stub at `Begin: Waiting for root file system` and I give up.

Any idea for this circumstance? Or I want to get help for a tutorial for building the latest linux package which PVE can use, thx!

 

[leesteken]

Maybe check out this thread with the same CPU and Windows 11 and crashes: https://forum.proxmox.com/threads/w...-once-crashes-proxmox-host.140670/post-629340

 

[jerrita]

I tried the flags and set the kvm ignore_msrs:

cpu-model: myhost
    flags -hypervisor;-tsc_adjust
    phys-bits host
    hv-vendor-id proxmox
    reported-model host

But not working for me. And the panic information only presents when I passthru my iGPU to it, otherwise it will run normally and steadily.

Specifically, the crashes happens on my launching vulkan apps frequently, so I'm confused.