I’m coming from bug 2121706. I’ve been troubleshooting the same “Meteor Lake + 
i915” GPU hangs on Ubuntu 
24.04 (Noble) and Ubuntu 25.04 (Plucky). The hallmark is:

i915 ... [drm] *ERROR* GT0: GUC: TLB invalidation response timed out for
seqno ...

Sometimes it escalates to GPU HANG / context resets. In my case setting 
i915.enable_guc=0 causes the system to not boot past GRUB (black screen / no 
login). So I can’t use that workaround suggested in other bugs.
Hardware

Laptop: Lenovo ThinkBook 14 G7 IML (Model 21MR)

GPU: Intel Meteor Lake-P (PCI ID 8086:7dd5, rev 08)

BIOS/UEFI: P3CN48WW (2025-03-27)

OS / kernels tested

Ubuntu 24.04.2 LTS with OEM/HWE kernels (e.g. 6.11.0-1025-oem;
previously also 6.8/6.14 variants)

Ubuntu 25.04 (Plucky) with 6.14.0-29-generic (also saw 6.14.0-27)

Microcode/firmware current (fwupdmgr shows no newer Lenovo updates for
this device)

Graphics stack status (important note about PPA)

Initially I had Oibaf PPA enabled. Per Ubuntu dev guidance I removed it
and downgraded DRM userspace back to Ubuntu stock:

sudo add-apt-repository ppa:oibaf/graphics-drivers -r
sudo rm -f /etc/apt/sources.list.d/oibaf-ubuntu-graphics-drivers-*.sources
sudo apt update

# Downgrade back to Ubuntu versions (both amd64+i386 where applicable):
sudo apt install --allow-downgrades \
  libdrm2=2.4.124-2 libdrm2:i386=2.4.124-2 \
  libdrm-amdgpu1=2.4.124-2 libdrm-amdgpu1:i386=2.4.124-2 \
  libdrm-intel1=2.4.124-2  libdrm-intel1:i386=2.4.124-2 \
  libdrm-nouveau2=2.4.124-2 libdrm-radeon1=2.4.124-2 \
  libdrm-common=2.4.124-2

apt-cache policy now shows candidates only from official Ubuntu repos.
The issue still reproduces without Oibaf.

Kernel parameters tried & results

i915.enable_psr=0 — kept disabled (PSR off).

i915.enable_dc=0 — tested both on/off; doesn’t eliminate the hangs.

intel_iommu=igfx_off — helps avoid VT-d/DMAR side noise; not a complete
fix.

i915.enable_guc=0 — system does not boot past GRUB on this machine.

How to reproduce (for me)

Most likely during video playback / video conferencing (YouTube, calls).

Sometimes under heavy desktop usage (Wayland/GNOME).

On Plucky 6.14 and Noble OEM 6.11 it can happen within a normal session.

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https://bugs.launchpad.net/bugs/2085434

Title:
  i915 GPU hangs on Intel Meteor Lake [*ERROR* GT0: GUC: TLB
  invalidation response timed out for seqno ...]

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