Even slower PC on ordinary SSD fails to initial start TDM too, AMD CPU & IGP w/ michal's kernel: # lscpu | grep Model Model name: AMD A10-7850K Radeon R7, 12 Compute Cores 4C+8G [ 6.540] Current Operating System: Linux asa88 5.16.10-4.gb145284-default #1 SMP PREEMPT Fri Feb 18 12:41:12 UTC 2022 (b145284) x86_64 [ 6.540] Kernel command line: BOOT_IMAGE=/boot/vmlinuz root=LABEL=tvgp07stw noresume ipv6.disable=1 net.ifnames=0 mitigations=auto consoleblank=0 radeon.cik_support=0 amdgpu.cik_support=1 5 ... [ 6.594] ABI class: X.Org Video Driver, version 25.2 [ 6.594] (II) modesetting: Driver for Modesetting Kernel Drivers: kms [ 7.356] (EE) open /dev/dri/card0: No such file or directory [ 7.356] (WW) Falling back to old probe method for modesetting [ 7.356] (EE) open /dev/dri/card0: No such file or directory [ 7.356] (EE) Screen 0 deleted because of no matching config section. [ 7.356] (II) UnloadModule: "modesetting" [ 7.356] (EE) Device(s) detected, but none match those in the config file. [ 7.356] (EE) Fatal server error: [ 7.356] (EE) no screens found(EE) # systemctl restart xdm fixes it for the current boot. My other Kaby Lake may or may not segfault with 5.16.8, so fail to start TDM until systemctl restart xdm fixes it for the current boot. What makes the difference between segfault or not is a puzzle to be solved....