(In reply to Takashi Iwai from comment #1) > Is the problem reproducible? It seems reproducible. It happened today again. >It doesn't sound like a kernel problem, per se. I don't know. Given that system hang I think kernel is involve. > In anyway, if you can see the problem again, please upload the dmesg output. I can upload a text file obtained with this command line? sudo dmesg > dmesg_2022_7_16 is it what you need? Is it necessary I collect dmesg when reboot as soon as possible after hang happened?