Public bug reported:
== Regression ==
Kernel 6.17.0-35-generic fails to boot on Acer Nitro ANV15-51 (Intel i5-13420H,
13th gen).
Kernel 6.17.0-14-generic boots successfully on identical hardware.
== Symptom ==
System drops to BusyBox initramfs shell at boot. NVMe drive is completely
invisible to the kernel (/proc/partitions empty, no block devices in /dev).
== Root Cause ==
The Intel VMD controller (PCI 0000:00:0e.0, ID 8086:a77f) is not being bound by
the vmd driver at boot. Without VMD, the NVMe drive (WD PC SN740 SDDQNQD-512G)
behind it is never enumerated.
Confirmed via:
- /proc/partitions empty at initramfs prompt
- ls /dev/ shows no nvme or sd devices
- ls /sys/bus/pci/devices/ shows 0000:00:0e.0 present but no driver bound
- modprobe nvme succeeds silently but drive still not visible
- No VMD lines appear in dmesg on 6.17.0-35-generic
- Fedora 41 kernel 6.15.4 on same hardware shows: "vmd 0000:00:0e.0: Bound to
PCI domain 10000"
== Hardware ==
- Machine: Acer Nitro ANV15-51
- CPU: Intel Core i5-13420H (13th gen Raptor Lake)
- NVMe: WD PC SN740 SDDQNQD-512G
- VMD PCI device: 0000:00:0e.0, vendor/device: 8086:a77f
- BIOS: InsydeH20 v1.14 (no VMD toggle exposed)
== Workaround ==
Boot 6.17.0-14-generic via GRUB advanced options. Hold the broken kernel:
sudo apt-mark hold linux-image-6.17.0-35-generic
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: i915 kernel nvme raptor-lake regression vmd
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https://bugs.launchpad.net/bugs/2155987
Title:
6.17.0-35-generic regression: Intel VMD (8086:a77f) fails to bind on
13th gen Intel, NVMe invisible, drops to initramfs
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