I915ovmfrom Upd -

sudo grub-mkconfig -o /boot/grub/grub.cfg Why? Disables Panel Self Refresh and Frame Buffer Compression, which can conflict with overlay VM updates. In your VM’s XML config (for KVM):

Also ensure your version is >= 22.3.0, as earlier versions had broken dri2 buffer exchange logic when dealing with overlay planes. i915ovmfrom upd

glxinfo -B | grep "OpenGL version" If older than 22.3, upgrade: sudo grub-mkconfig -o /boot/grub/grub

By: TechInsight Staff | Updated: October 2023 glxinfo -B | grep "OpenGL version" If older than 22

| Parameter | Effect | |-----------|--------| | i915.enable_gvt=1 | Enables proper GVT-g virtualization support | | i915.enable_guc=2 | Uses GuC submission for better VM isolation | | i915.vm_update_strategy=2 | Forces eager VM updates instead of delayed (kernel 6.5+) |

<video> <model type='virtio' heads='1' vram='16384' /> </video> Set vram to a lower value (e.g., 8192 instead of 32768 ) to reduce GTT pressure. The i915ovmfrom upd bug was partially fixed in Linux kernel 6.2+ for Alder Lake and 6.4+ for Meteor Lake.

The ovm part of our keyword likely relates to —a technique to map guest physical addresses to host physical addresses in a nested virtualized environment (e.g., running Docker inside a KVM VM on an Intel host). 3. What is OVM? (Oracle VM vs. Overlay VM) Two interpretations exist for "OVM" in this context. A. Oracle VM Server (Less Likely) Oracle VM Server for x86 uses a modified Xen hypervisor. Some legacy bug reports from 2018–2020 mention i915 errors inside Oracle VM DomUs (guests). However, ovmfrom is not a standard Oracle VM string. B. Overlay Virtual Machine / Overlay Memory (Most Likely) In the Linux kernel’s drm/i915 subsystem, "overlay" refers to a hardware overlay plane—a separate display pipeline that can scan out video frames without compositing. The ovm abbreviation has been spotted in the intel_overlay.c source code.