I get the following errors during boot (Ubuntu 22.04) in my kern.log:
Oct 23 12:43:46 fulmar kernel: [ 3.895065] ACPI BIOS Error (bug): Could not resolve symbol [\_TZ.ETMD], AE_NOT_FOUND (20230628/psargs-330)
Oct 23 12:43:46 fulmar kernel: [ 3.895079]
Oct 23 12:43:46 fulmar kernel: [ 3.895081] No Local Variables are initialized for Method [_OSC]
Oct 23 12:43:46 fulmar kernel: [ 3.895082]
Oct 23 12:43:46 fulmar kernel: [ 3.895084] Initialized Arguments for Method [_OSC]: (4 arguments defined for method invocation)
Oct 23 12:43:46 fulmar kernel: [ 3.895085] Arg0: 0000000082c0ef8c <Obj> Buffer(16) 5D A8 3B B2 B7 C8 42 35
Oct 23 12:43:46 fulmar kernel: [ 3.895096] Arg1: 000000004d616fe1 <Obj> Integer 0000000000000001
Oct 23 12:43:46 fulmar kernel: [ 3.895102] Arg2: 00000000f330ad5f <Obj> Integer 0000000000000002
Oct 23 12:43:46 fulmar kernel: [ 3.895201] Arg3: 000000003879daaf <Obj> Buffer(8) 00 00 00 00 05 00 00 00
Oct 23 12:43:46 fulmar kernel: [ 3.895481]
Oct 23 12:43:46 fulmar kernel: [ 3.895483] ACPI Error: Aborting method \_SB.IETM._OSC due to previous error (AE_NOT_FOUND) (20230628/psparse-529)
I see from this post (BIOS bug: `_TZ.ETMD` missing in ACPI tables) that this may related to thermal issues (although the last responses there are 2 years old).
Now this possible thermal connection is interesting because I’ve been having problems with my fan for a while now (sudden and rapidly-switching on/off with no obvious relation to activity or temperatures (if I monitor the sensors)). So is there a connection? Better yet, a fix?
I’ve already tried upgrading the BIOS from its initial default to 3.17 and then 3.20 but both the fan issue and the ACPI Errors persist. I only just wondered if there was a possible connection on reading the above post, which I should probably have done before…
Does anybody have any ideas?
Thanks,
D