Hi,
I upgraded my Lenovo B570 from 12.1 to 12.2 x86_64 and experienced several system crashes.
System was going randomly to kernel panic with various reasons I wasn’t able to trace to any particular running program or action.
Finally I traced the issue to ACPI management, which was somehow linked to acer_wmi kernel module, which I found over the net to be reported as buggy or incomplete.
Actually, this module had been blacklisted on my 12.1 installation because of wlan detection and Network Manager issues reported in forums, but 12.1->12.2 upgrade process reinstated it (or, better, renamed file /etc/modprobe.d/50-broadcom-wl-blacklist.conf to .rpmnew voiding the action: this file included several blacklist instruction to avoid above issues).
The final solution was to add instruction
blacklist acer_wmi
to file /etc/modprobe.d/50-blacklist.conf or to create a specific blacklist file in the same directory, such as 50-acer_wmi-blacklist.conf .
Hope this helps
lsalv