Confirmed that graphics init fails: when system is restarted with broken kernel, it is accessible via ssh.
Grepping for amdgpu in kern.log results in: Jan 5 18:50:53 alrock kernel: [ 3.910928] [drm] amdgpu kernel modesetting enabled. Jan 5 18:50:53 alrock kernel: [ 3.911042] amdgpu: Topology: Add APU node [0x0:0x0] Jan 5 18:50:53 alrock kernel: [ 3.911111] fb0: switching to amdgpudrmfb from EFI VGA Jan 5 18:50:53 alrock kernel: [ 3.911516] amdgpu 0000:09:00.0: vgaarb: deactivate vga console Jan 5 18:50:53 alrock kernel: [ 3.911701] amdgpu 0000:09:00.0: amdgpu: Trusted Memory Zone (TMZ) feature enabled Jan 5 18:50:53 alrock kernel: [ 3.943546] amdgpu 0000:09:00.0: amdgpu: Fetched VBIOS from ROM BAR Jan 5 18:50:53 alrock kernel: [ 3.943551] amdgpu: ATOM BIOS: 113-PICASSO-118 Jan 5 18:50:53 alrock kernel: [ 3.943983] amdgpu 0000:09:00.0: amdgpu: VRAM: 2048M 0x000000F400000000 - 0x000000F47FFFFFFF (2048M used) Jan 5 18:50:53 alrock kernel: [ 3.943986] amdgpu 0000:09:00.0: amdgpu: GART: 1024M 0x0000000000000000 - 0x000000003FFFFFFF Jan 5 18:50:53 alrock kernel: [ 3.943989] amdgpu 0000:09:00.0: amdgpu: AGP: 267419648M 0x000000F800000000 - 0x0000FFFFFFFFFFFF Jan 5 18:50:53 alrock kernel: [ 3.944034] [drm] amdgpu: 2048M of VRAM memory ready Jan 5 18:50:53 alrock kernel: [ 3.944040] [drm] amdgpu: 3072M of GTT memory ready. Jan 5 18:50:53 alrock kernel: [ 3.951844] amdgpu: hwmgr_sw_init smu backed is smu10_smu Jan 5 18:50:53 alrock kernel: [ 3.953750] amdgpu 0000:09:00.0: amdgpu: Will use PSP to load VCN firmware Jan 5 18:50:53 alrock kernel: [ 4.039547] amdgpu 0000:09:00.0: amdgpu: RAS: optional ras ta ucode is not available Jan 5 18:50:53 alrock kernel: [ 4.044506] amdgpu 0000:09:00.0: amdgpu: RAP: optional rap ta ucode is not available Jan 5 18:50:53 alrock kernel: [ 4.083438] snd_hda_intel 0000:09:00.1: bound 0000:09:00.0 (ops amdgpu_dm_audio_component_bind_ops [amdgpu]) Jan 5 18:50:53 alrock kernel: [ 4.196382] kfd kfd: amdgpu: Allocated 3969056 bytes on gart Jan 5 18:50:53 alrock kernel: [ 4.196450] kfd kfd: amdgpu: error getting iommu info. is the iommu enabled? Jan 5 18:50:53 alrock kernel: [ 4.196455] kfd kfd: amdgpu: Error initializing iommuv2 Jan 5 18:50:53 alrock kernel: [ 4.196616] kfd kfd: amdgpu: device 1002:15d8 NOT added due to errors Jan 5 18:50:53 alrock kernel: [ 4.196619] kfd kfd: amdgpu: Failed to resume IOMMU for device 1002:15d8 Jan 5 18:50:53 alrock kernel: [ 4.196622] amdgpu 0000:09:00.0: amdgpu: amdgpu_device_ip_init failed Jan 5 18:50:53 alrock kernel: [ 4.196626] amdgpu 0000:09:00.0: amdgpu: Fatal error during GPU init Jan 5 18:50:53 alrock kernel: [ 4.196629] amdgpu 0000:09:00.0: amdgpu: amdgpu: finishing device. Jan 5 18:50:53 alrock kernel: [ 4.242549] [drm] amdgpu: ttm finalized -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1956399 Title: Regression: kernel does not init graphics (?) on AMD Ryzen 5 3400G Status in linux package in Ubuntu: Confirmed Bug description: After latest upgrade of linux-image to 5.13.0.23.34 system seem to boot, but it looks like graphics does not initialize correctly. After showing initial init logging, at the moment when X should init and graphics login should appear, monitor just goes to sleep and provides diagnostic message that there is no signal on selected input. apt upgrade log: Start-Date: 2022-01-04 23:21:11 Commandline: apt upgrade Requested-By: xxxxxx (1000) Install: linux-modules-extra-5.13.0-23-generic:amd64 (5.13.0-23.23, automatic), linux-image-5.13.0-23-generic:amd64 (5.13.0-23.23, automatic), linux-headers-5.13.0-23-generic:amd64 (5.13.0-23.23, automatic), linux-modules-5.13.0-23-generic:amd64 (5.13.0-23.23, automatic), linux-headers-5.13.0-23:amd64 (5.13.0-23.23, automatic) Upgrade: linux-headers-generic:amd64 (5.13.0.22.33, 5.13.0.23.34), google-chrome-stable:amd64 (96.0.4664.110-1, 97.0.4692.71-1), linux-generic:amd64 (5.13.0.22.33, 5.13.0.23.34), linux-image-generic:amd64 (5.13.0.22.33, 5.13.0.23.34), linux-libc-dev:amd64 (5.13.0-22.22, 5.13.0-23.23) End-Date: 2022-01-04 23:22:39 Currently working around this issues by booting previous version of the kernel. ProblemType: Bug DistroRelease: Ubuntu 21.10 Package: linux-generic 5.13.0.23.34 ProcVersionSignature: Ubuntu 5.13.0-22.22-generic 5.13.19 Uname: Linux 5.13.0-22-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu71 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: alexei 2532 F.... pulseaudio /dev/snd/pcmC1D0p: alexei 2532 F...m pulseaudio /dev/snd/controlC0: alexei 2532 F.... pulseaudio CasperMD5CheckResult: unknown CurrentDesktop: ubuntu:GNOME Date: Wed Jan 5 01:02:53 2022 HibernationDevice: RESUME=UUID=45af239b-c597-45a1-bb72-3ba25b5ee546 InstallationDate: Installed on 2016-01-06 (2190 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) IwConfig: lo no wireless extensions. enp8s0 no wireless extensions. lxcbr0 no wireless extensions. MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M. ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.13.0-22-generic root=UUID=d4f27b9e-0cff-49e1-8392-a41aa520bd85 ro RelatedPackageVersions: linux-restricted-modules-5.13.0-22-generic N/A linux-backports-modules-5.13.0-22-generic N/A linux-firmware 1.201.3 RfKill: SourcePackage: linux UpgradeStatus: Upgraded to impish on 2021-10-05 (91 days ago) dmi.bios.date: 05/10/2021 dmi.bios.release: 5.17 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: P5.00 dmi.board.name: B450 Pro4 dmi.board.vendor: ASRock dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP5.00:bd05/10/2021:br5.17:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnB450Pro4:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:skuToBeFilledByO.E.M.: dmi.product.family: To Be Filled By O.E.M. dmi.product.name: To Be Filled By O.E.M. dmi.product.sku: To Be Filled By O.E.M. dmi.product.version: To Be Filled By O.E.M. dmi.sys.vendor: To Be Filled By O.E.M. 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