Public bug reported:
Host OS:
Ubuntu 24.04.2 LTS
Kernel 6.11.0-21-generic
CPU: AMD Ryzen 9 5900X
Software Firmware version: F2
GPU 1: AMD Radeon RX 6400 (Used by Host OS)
GPU 2: AMD Radeon RX 6800 (Used by VMs via GPU passthrough, on PCI bus 10:00.0)
$ apt-cache policy linux-firmware
linux-firmware:
Installed: 20240318.git3b128b60-0ubuntu2.11
Candidate: 20240318.git3b128b60-0ubuntu2.11
Version table:
*** 20240318.git3b128b60-0ubuntu2.11 500
500 http://us.archive.ubuntu.com/ubuntu noble-updates/main amd64
Packages
500 http://security.ubuntu.com/ubuntu noble-security/main amd64 Packages
100 /var/lib/dpkg/status
20240318.git3b128b60-0ubuntu2 500
500 http://us.archive.ubuntu.com/ubuntu noble/main amd64 Packages
What should have happened:
VM with GPU passthrough should start
What happend instead:
VM with GPU passthrough wouldn't start. I tried running 'lspci -nns
0000:10:00.0' but this hung the terminal. Virtual Machine Manager was
now showing it couldn't connect to the KVM daemon. I rebooted the Host
OS but running 'lspci -nns 0000:10:00.0' again hung and I still couldn't
start the VM with GPU passthrough.
Extra info:
After installing updates to the Host OS on 2025-4-10, VMs without GPU
passthrough worked fine. On 2025-4-12 I tried to start a VM with GPU
passthrough but it wouldn't start.
On 2025-4-10 one of the Host OS updates was linux-firmware:amd64
(20240318.git3b128b60-0ubuntu2.10 -> 20240318.git3b128b60-0ubuntu2.11).
I wanted to test downgrading the linux-firmware back to version 2.10 but
that is no longer available. I was able to find, from this launchpad,
the files that were in the 2.10 and 2.11 versions of linux-firmware. I
found the differences between the files for the amdgpu firmware files. I
overwrote the /lib/firmware/amdgpu files on my host OS with the files
from 2.10 and rebooted - the VM with GPU passthrough was able to start
(and the lspci command worked.)
The list of amdgpu firmware files I overwrote was:
gc_11_5_1_imu.bin.zst
gc_11_5_1_me.bin.zst
gc_11_5_1_mec.bin.zst
gc_11_5_1_mes1.bin.zst
gc_11_5_1_mes_2.bin.zst
gc_11_5_1_pfp.bin.zst
gc_11_5_1_rlc.bin.zst
isp_4_1_1.bin.zst
psp_14_0_1_ta.bin.zst
psp_14_0_1_toc.bin.zst
sdma_6_1_1.bin.zst
vcn_4_0_6_1.bin.zst
vcn_4_0_6.bin.zst
vpe_6_1_1.bin.zst
** Affects: linux-firmware (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2107285
Title:
KVM VM with GPU passthrough won't start
Status in linux-firmware package in Ubuntu:
New
Bug description:
Host OS:
Ubuntu 24.04.2 LTS
Kernel 6.11.0-21-generic
CPU: AMD Ryzen 9 5900X
Software Firmware version: F2
GPU 1: AMD Radeon RX 6400 (Used by Host OS)
GPU 2: AMD Radeon RX 6800 (Used by VMs via GPU passthrough, on PCI bus
10:00.0)
$ apt-cache policy linux-firmware
linux-firmware:
Installed: 20240318.git3b128b60-0ubuntu2.11
Candidate: 20240318.git3b128b60-0ubuntu2.11
Version table:
*** 20240318.git3b128b60-0ubuntu2.11 500
500 http://us.archive.ubuntu.com/ubuntu noble-updates/main amd64
Packages
500 http://security.ubuntu.com/ubuntu noble-security/main amd64
Packages
100 /var/lib/dpkg/status
20240318.git3b128b60-0ubuntu2 500
500 http://us.archive.ubuntu.com/ubuntu noble/main amd64 Packages
What should have happened:
VM with GPU passthrough should start
What happend instead:
VM with GPU passthrough wouldn't start. I tried running 'lspci -nns
0000:10:00.0' but this hung the terminal. Virtual Machine Manager was
now showing it couldn't connect to the KVM daemon. I rebooted the Host
OS but running 'lspci -nns 0000:10:00.0' again hung and I still
couldn't start the VM with GPU passthrough.
Extra info:
After installing updates to the Host OS on 2025-4-10, VMs without GPU
passthrough worked fine. On 2025-4-12 I tried to start a VM with GPU
passthrough but it wouldn't start.
On 2025-4-10 one of the Host OS updates was linux-firmware:amd64
(20240318.git3b128b60-0ubuntu2.10 ->
20240318.git3b128b60-0ubuntu2.11).
I wanted to test downgrading the linux-firmware back to version 2.10
but that is no longer available. I was able to find, from this
launchpad, the files that were in the 2.10 and 2.11 versions of linux-
firmware. I found the differences between the files for the amdgpu
firmware files. I overwrote the /lib/firmware/amdgpu files on my host
OS with the files from 2.10 and rebooted - the VM with GPU passthrough
was able to start (and the lspci command worked.)
The list of amdgpu firmware files I overwrote was:
gc_11_5_1_imu.bin.zst
gc_11_5_1_me.bin.zst
gc_11_5_1_mec.bin.zst
gc_11_5_1_mes1.bin.zst
gc_11_5_1_mes_2.bin.zst
gc_11_5_1_pfp.bin.zst
gc_11_5_1_rlc.bin.zst
isp_4_1_1.bin.zst
psp_14_0_1_ta.bin.zst
psp_14_0_1_toc.bin.zst
sdma_6_1_1.bin.zst
vcn_4_0_6_1.bin.zst
vcn_4_0_6.bin.zst
vpe_6_1_1.bin.zst
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/2107285/+subscriptions
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