Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux (Ubuntu Noble)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/2117335
Title:
Noble 6.8.0-64.67 update prevents vanilla LXD setup from launching
QEMU-based VMs with SR-IOV network interfaces
Status in linux package in Ubuntu:
Confirmed
Status in linux source package in Noble:
Confirmed
Bug description:
[email protected] contacted me about a possible regression (if it
is indeed a regression it probably came from the upstream and might be
related to https://bugs.launchpad.net/ubuntu/+source/linux-
lowlatency/+bug/2117334).
Fabian's mail:
--------------------------------------------------------------------------------------------------------
The recent Kernel 6.8.0-64.67 update [1] for Noble 24.04 seems to have
changed something under the hood, preventing a vanilla LXD setup from launching
QEMU-based VMs with SR-IOV network interfaces [2].
A temporary rollback via GRUB to 6.8.0-63.66 fixes the problem instantly.
I went through the diff [3], but haven’t found anything concrete (yet).
Fortunately (or unfortunately in this case), I‘m not alone with this
issue, as even downstream projects like Proxmox are now affected [4 &
5].
What do you think? Any hints?
[1] https://launchpad.net/ubuntu/+source/linux/6.8.0-64.67
[2] Error: Failed setting up device via monitor: Failed setting up
device "eth0": Failed adding NIC device: vfio 0000:2b:0a.1: error
getting device from group 59: Permission denied
[3]
https://launchpad.net/ubuntu/+archive/primary/+files/linux_6.8.0-63.66_6.8.0-64.67.diff.gz
[4] https://forum.proxmox.com/threads/kernel-6-8-12-12-pve-update-
results-in-vfio-pci-passthrough-issues.168519
[5] https://forum.proxmox.com/threads/regression-cannot-start-vms-
with-kernel-6-8-12-12-pve-and-6-14-8-1-bpo12-pve-and-pci-passthrough-
sr-iov-x710-vf.168514
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