@juergh I think I installed hwe-6.14 - the instructions didn't explicitly say how to install it so I enabled proposed and then ran:
sudo apt install linux-generic-hwe-24.04-edge/noble-proposed After rebooting it shows I'm running the 6.14 kernel $ uname -r 6.14.0-24-generic I installed it on 2025-07-04 and its been running fine since. The GPU passthrough works and I've rebooted 3 times without any issues with the KVM daemon - so maybe this issue is solved (though I haven't updated packages since, and am not sure if the issue was anyway related to updates of the kernel package.) Another issue that maybe improved is GPU resets. With the 6.11 kernel every few days (if not more often) my screen would go blank for several seconds and occasionally the gpu reset would even log me out requiring me to login to the display manager again. Maybe its too early to tell, but I don't think I've experienced this issue since updating to the 6.14 kernel. apt is showing there's updates available for me to install (for linux- image-6.11.0-26-generic.) If I install this will it just update grub and have me boot back into the 6.11 kernel? I'm fine moving back to the standard kernel since I feel I've now successfully tested 6.14. Or do I need to do something else to move back to the 6.11 kernel (e.g. uninstall the 6.14 packages)? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-firmware in Ubuntu. https://bugs.launchpad.net/bugs/2107285 Title: KVM VM with GPU passthrough won't start Status in linux-firmware package in Ubuntu: Incomplete 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 --- ProblemType: Bug ApportVersion: 2.28.1-0ubuntu3.5 Architecture: amd64 CRDA: N/A CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Dependencies: firmware-sof-signed 2023.12.1-1ubuntu1.4 DistroRelease: Ubuntu 24.04 InstallationDate: Installed on 2024-06-01 (326 days ago) InstallationMedia: Ubuntu 24.04 LTS "Noble Numbat" - Release amd64 (20240424) MachineType: Gigabyte Technology Co., Ltd. X570S AORUS PRO AX Package: linux-firmware 20240318.git3b128b60-0ubuntu2.11 PackageArchitecture: amd64 ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color XDG_RUNTIME_DIR=<set> ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.11.0-21-generic root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash amd_iommu=on iommu=pt vt.handoff=7 ProcVersionSignature: Ubuntu 6.11.0-21.21~24.04.1-generic 6.11.11 RelatedPackageVersions: linux-restricted-modules-6.11.0-21-generic N/A linux-backports-modules-6.11.0-21-generic N/A linux-firmware 20240318.git3b128b60-0ubuntu2.11 Tags: noble wayland-session Uname: Linux 6.11.0-21-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip kvm libvirt libvirt-dnsmasq lpadmin plugdev storage sudo users _MarkForUpload: True dmi.bios.date: 07/08/2021 dmi.bios.release: 5.17 dmi.bios.vendor: American Megatrends International, LLC. dmi.bios.version: F2 dmi.board.asset.tag: Default string dmi.board.name: X570S AORUS PRO AX dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.asset.tag: Default string dmi.chassis.type: 3 dmi.chassis.vendor: Default string dmi.chassis.version: Default string dmi.modalias: dmi:bvnAmericanMegatrendsInternational,LLC.:bvrF2:bd07/08/2021:br5.17:svnGigabyteTechnologyCo.,Ltd.:pnX570SAORUSPROAX:pvr-CF:rvnGigabyteTechnologyCo.,Ltd.:rnX570SAORUSPROAX:rvrx.x:cvnDefaultstring:ct3:cvrDefaultstring:skuDefaultstring: dmi.product.family: X570 MB dmi.product.name: X570S AORUS PRO AX dmi.product.sku: Default string dmi.product.version: -CF dmi.sys.vendor: Gigabyte Technology Co., Ltd. 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