So, the issue is still present on 5.14.5-1-default this morning. The NVME temperature is totally fine: > # sensors > ... > nvme-pci-3c00 > Adapter: PCI adapter > Composite: +24.9������C (low = -5.2������C, high = +83.8������C) > (crit = +87.8������C) Still I got the same error messages at first boot. After a reboot, the system behaves nicely again. I checked for available firmware updates, and according to fwupdmgr there are no updates available. I remember to do the last firmware update in the last months, so this is also reasonable > # fwupdmgr get-devices > ... > Devices that have been updated successfully: > > ��������� System Firmware (1.19.0 ��������� 1.20.0) > fwupdmgr get-updates > > Devices with no available firmware updates: > ��������� Dell WD15 > ��������� Dell WD15 Passive Cable > ��������� Dell WD15 Port Controller 1 > ��������� TPM 2.0 > ��������� UEFI dbx > ��������� VMM3332 inside Dell WD15/TB16/TB18 wired Dock > ��������� WDS100T3X0C-00SJG0 > Devices with the latest available firmware version: > ��������� System Firmware > ��������� Unifying Receiver > No updates available for remaining devices Guess the next step is the screwdriver?