iGPU passthrough with Intel UHD Graphis 600 on Intel Celeron J4115 stopped working with Kernel 7.0

[ChristophBecker]

Hello everybody,

i have the following problem.

My VM with iGPU passthrough starts without problems with kernel 6.17 but stopped starting with kernel 7.0.

dmesg:

DMAR: DRHD: handling fault status reg 2
DMAR: [DMA Write NO_PASID] Request device [00:02.0] fault addr 0x0 [fault reason 0x02] Present bit in context entry is clear

pveversion -v

proxmox-ve: 9.2.0 (running kernel: 7.0.14-8-pve)
pve-manager: 9.2.6 (running version: 9.2.6/7f8d010005bd72cb)
proxmox-kernel-helper: 9.2.0
proxmox-kernel-7.0.14-8-pve-signed: 7.0.14-8
proxmox-kernel-7.0: 7.0.14-8
proxmox-kernel-7.0.14-6-pve-signed: 7.0.14-6
proxmox-kernel-6.17: 6.17.13-21
proxmox-kernel-6.17.13-21-pve-signed: 6.17.13-21
proxmox-kernel-6.17.13-19-pve-signed: 6.17.13-19
proxmox-kernel-6.8.12-13-pve-signed: 6.8.12-13
proxmox-kernel-6.8: 6.8.12-13
proxmox-kernel-6.8.4-2-pve-signed: 6.8.4-2
ceph-fuse: 19.2.3-pve1
corosync: 3.1.10-pve3
criu: 4.1.1-1
frr-pythontools: 10.6.1-1+pve2
ifupdown2: 3.3.0-1+pmx12
intel-microcode: 3.20251111.1~deb13u1
ksm-control-daemon: 1.5-1
libjs-extjs: 7.0.0-5
libproxmox-acme-perl: 1.7.2
libproxmox-backup-qemu0: 2.0.2
libproxmox-rs-perl: 0.4.1
libpve-access-control: 9.1.1
libpve-apiclient-perl: 3.4.2
libpve-cluster-api-perl: 9.1.6
libpve-cluster-perl: 9.1.6
libpve-common-perl: 9.1.20
libpve-guest-common-perl: 6.0.5
libpve-http-server-perl: 6.0.5
libpve-network-perl: 1.6.7
libpve-notify-perl: 9.1.6
libpve-rs-perl: 0.15.3
libpve-storage-perl: 9.1.7
libspice-server1: 0.15.2-1+b1
lvm2: 2.03.31-2+pmx1
lxc-pve: 7.0.0-2
lxcfs: 7.0.0-pve1
novnc-pve: 1.7.0-2
proxmox-backup-client: 4.2.3-1
proxmox-backup-file-restore: 4.2.3-1
proxmox-backup-restore-image: 1.0.0
proxmox-enterprise-support-keyring: 1.1
proxmox-firewall: 1.2.3
proxmox-kernel-helper: 9.2.0
proxmox-mail-forward: 1.0.3
proxmox-mini-journalreader: 1.7
proxmox-offline-mirror-helper: 0.7.4
proxmox-widget-toolkit: 5.2.6
pve-cluster: 9.1.6
pve-container: 6.1.12
pve-docs: 9.2.3
pve-edk2-firmware: 4.2025.05-2
pve-esxi-import-tools: 1.0.1
pve-firewall: 6.0.5
pve-firmware: 3.18-5
pve-ha-manager: 5.2.5
pve-i18n: 3.9.0
pve-qemu-kvm: 11.0.3-1
pve-xtermjs: 6.0.0-2
qemu-server: 9.2.1
smartmontools: 7.5-pve2
spiceterm: 3.4.2
swtpm: 0.8.0+pve3
vncterm: 1.9.2
zfsutils-linux: 2.4.3-pve1

Does anybody know this problem? i915 drivers are blacklisted, kernel driver in use is vfio-pci, iGPU is in its own IOMMU-group. I Also tried disabling hugepages without success.

Many thanks and kind regards
Christoph

 

[JohnnieKF]

Pin 6.17 for now so you're not stuck with a broken passthrough:
proxmox-boot-tool kernel pin 6.17.13-21-pve

Then post your VM config so we can see how the device is attached:
qm config <VMID>

 

[ChristophBecker]

Thank you for your reply!

Pin 6.17 for now so you're not stuck with a broken passthrough:
proxmox-boot-tool kernel pin 6.17.13-21-pve

I already did that, thank you.

Then post your VM config so we can see how the device is attached:
qm config <VMID>

agent: 1
boot: order=scsi0;ide2;net0
cores: 4
cpu: x86-64-v2-AES
hostpci0: 0000:00:02.0
ide2: none,media=cdrom
memory: 12288
meta: creation-qemu=9.2.0,ctime=1749647961
name: ***
net0: virtio=***,bridge=vmbr0,firewall=1,tag=***
numa: 0
onboot: 1
ostype: l26
scsi0: ***:vm-105-disk-0,discard=on,iothread=1,size=32G,ssd=1
scsihw: virtio-scsi-single
smbios1: uuid=***
sockets: 1
tablet: 0
tags: Debian;Docker
vga: none
vmgenid: ***

 

[ChristophBecker]

Hello everybody,

I still get the same error messages with recent kernel 7.0.14.

Anyone who solved this problem or with an idea how to solve it?

Many thanks
Christoph

 

[ChristophBecker]

Hello everyone,

problem solved. After digging deep in the host logs I found out that the kvm process for the problematic vm got killed by oom. I decreased the memory for that vm from 12 GiB (out of 16 GiB) to 10 GiB. Now the vm starts.

Sorry for the inconvenience!
Christoph