Control: tags -1 + moreinfo Hi Nicholas, thanks again for your response.
In my new year holidays, I built the upstream (not Debian) 5.10.6 kernel and saw what happend. The situation got better, * booting always succeeded (at least I did not observe it) * tpm error persisted * I did "systemctl poweroff" immediately after I got "login:". The shutdown behavior was very strange, many systemd services cannot be stopped cleanly and timeouts occurred many times. I cut the power line after waiting 5 minutes or so. I'd like to see the situation again after the upstream version gets 5.10.10 or so, because, for I now have very little (or no) trust on the upstream (not Debian) kernel as * arm64 kernel does not boot at all on raspberry pi 4B on USB MSD https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=977694 * arm64 kernel did not boot on raspberry pi 4B on SD card, (all usual booting devices did not work). It seems fixed in upstream 5.10.6 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=977645 * wireless network does not work on raspberry pi 4B (this has not been reported as booting on my raspi has not been confirmed on any Debian kernel). Simply, I am tired of seeing if 5.10.? kernel works normally or not on my machines. I have seen little problem in Debian 5.9.* series. Since 5.10 is LTS, maybe 5.10.10 or 5.10.20 will gets as good as 5.9.15. I will stick to Debian 5.9.15 kernel on my amd64 notebook and raspi4b for a while... Best regards, Ryutaroh Matsumoto