Matthew, thanks a lot. I can confirm the issue is gone. There is a bunch of preexisting errors related to the BIOS as far as I can see, but these were present in .22 too. Please go right ahead with the patch submission and hopefully it'll make it into .26 kernel.

vadikmironov@MINIPC-PN50:~$ uname -rv
5.13.0-23-generic #23+TEST1956519v20220112b1-Ubuntu SMP Wed Jan 12 00:24:19 UTC 20
vadikmironov@MINIPC-PN50:~$ sudo dmesg | grep -i bug
[    0.159485] ACPI BIOS Error (bug): Failure creating named object [\SMIB], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.160771] ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PCI0.M291.WLAN], AE_NOT_FOUND (20210331/dswload2-162)
[    0.162718] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.VER1], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162742] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.CCI0], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162748] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.CCI1], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162753] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.CCI2], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162758] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.CCI3], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162779] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.CTL0], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162785] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.CTL1], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162790] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.CTL2], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162795] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.CTL3], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162800] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.CTL4], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162805] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.CTL5], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162811] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.CTL6], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162817] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.CTL7], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162840] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGI0], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162846] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGI1], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162852] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGI2], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162857] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGI3], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162863] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGI4], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162869] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGI5], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162874] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGI6], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162880] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGI7], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162885] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGI8], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162891] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGI9], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162897] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGIA], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162902] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGIB], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162908] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGIC], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162913] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGID], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162919] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGIE], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162925] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGIF], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162950] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGO0], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162956] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGO1], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162961] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGO2], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162967] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGO3], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162973] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGO4], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162978] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGO5], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162984] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGO6], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162990] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGO7], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.162995] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGO8], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.163001] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGO9], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.163006] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGOA], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.163012] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGOB], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.163018] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGOC], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.163023] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGOD], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.163029] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGOE], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.163035] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.SBRG.EC0.MGOF], AE_ALREADY_EXISTS (20210331/dsfield-637)
[    0.165377] ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored
[    0.169088] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[    3.279320] Disabling lock debugging due to kernel taint
[    5.282581] systemd[1]: Mounting Kernel Debug File System...
[    5.301858] systemd[1]: Mounted Kernel Debug File System.
[    5.688286] ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PCI0.SBRG.EC0.OKEC], AE_NOT_FOUND (20210331/psargs-330)
[   19.944438] SGI XFS with ACLs, security attributes, realtime, quota, no debug enabled
vadikmironov@MINIPC-PN50:~$