It seems that this is a bug from upstream linux, which may be patched
soon. Please see
https://lore.kernel.org/stable/164448100914.10463.9523338503936670263.kv...@kernel.org/
Blacklisting the iwlwifi kernel module works as a workaround for now, as
is suggested by Jason Self, the maintainer of the Freesh and libeRTy apt
repositories of linux-libre kernel. He mentioned it in Trisquel forum at
https://trisquel.info/en/forum/trisquel-9-linux-libre-51517-will-not-allow-login
and at https://lore.kernel.org/all/20220203161959.3edf1d6e@valencia/
I'd removed the Intel AX201NGW Wi-Fi & Bluetooth card from my Acer Swift
3x laptop two days ago. There isn't any wireless network card installed
now. The system runs without errors, which may be because the iwlwifi
kernel module is not loaded due to the lack of a Wi-Fi network card.
Before that, the system hanged randomly with the most recent versions of
the kernel series 5.4, 5.10 and 5.15.
