Created attachment 277669 [details]
Kernels up to 4.16 didn't exhibit this problem
Contrarily to bug 198071, I don't seem to experience any particular problem in functionalities.
After a looong bisect session, it seemingly is due to 5a8361f7ecceaed64b4064000d16cb703462be49
ACPICA: Integrate package handling with module-level code
Created attachment 277935 [details]
dmesg, no term_list
Actually, sorry Erik, I just realized this isn't a regression (something that previously was working, now doesn't anymore).. but actually a fix leading to the previously never initialized piix4_smbus to *start to do something at all*
I compiled 4.18 with acpi_gbl_execute_tables_as_methods (aka acpi_gbl_parse_table_as_term_list) set to FALSE, restoring previous behavior.. And I noticed where there always existed an acpi warning about conflicting SystemIO range with \_SB.SMB0 OpRegion, there now was the SMBus popping up.
Well, in the meantime I'll go with module_blacklist=i2c_piix4
For the reminder duplicate of bug 112811
*** This bug has been marked as a duplicate of bug 112811 ***