ACPI Errors - do I need to do anything about them?

[jaytee129]

At boot up I get a bunch of ACPI BIOS Error (bug) messages. I'm trying to figure out what they mean and what to tell the vendor about it, if anything, given it's labelled a bug.

The following is an example of the messages I get, and attached is a more complete set of messages about ACPI I get at boot up (not all bad).

I noticed the BIOS in the unit (a new mini PC with an 11th Gen Intel Core i5-11320H) only offers two options for boot up in the ACPI section: Power On / Power Off. Most, if not all other systems I've seen also offer "Last State". Could that the reason for these errors? Will this bug affect system behavior? if so, what could happen (or not happen) under what circumstances?

Jul 25 08:58:46 thibworldpx2 kernel: ACPI BIOS Error (bug): Could not resolve symbol [\_SB.UBTC.RUCC], AE_NOT_FOUND (20210730/psargs-330)
Jul 25 08:58:46 thibworldpx2 kernel:
Jul 25 08:58:46 thibworldpx2 kernel: No Local Variables are initialized for Method [_PLD]
Jul 25 08:58:46 thibworldpx2 kernel:
Jul 25 08:58:46 thibworldpx2 kernel: No Arguments are initialized for method [_PLD]
Jul 25 08:58:46 thibworldpx2 kernel:
Jul 25 08:58:46 thibworldpx2 kernel: ACPI Error: Aborting method \_SB.PC00.TXHC.RHUB.SS01._PLD due to previous error (AE_NOT_FOUND) (20210730/psparse-529)
Jul 25 08:58:46 thibworldpx2 kernel: ACPI BIOS Error (bug): Could not resolve symbol [\_SB.UBTC.RUCC], AE_NOT_FOUND (20210730/psargs-330)
Jul 25 08:58:46 thibworldpx2 kernel:
Jul 25 08:58:46 thibworldpx2 kernel: No Local Variables are initialized for Method [_PLD]
Jul 25 08:58:46 thibworldpx2 kernel:
Jul 25 08:58:46 thibworldpx2 kernel: No Arguments are initialized for method [_PLD]
Jul 25 08:58:46 thibworldpx2 kernel:
Jul 25 08:58:46 thibworldpx2 kernel: ACPI Error: Aborting method \_SB.PC00.TXHC.RHUB.SS02._PLD due to previous error (AE_NOT_FOUND) (20210730/psparse-529)
Jul 25 08:58:46 thibworldpx2 kernel: ACPI BIOS Error (bug): Could not resolve symbol [\_SB.UBTC.RUCC], AE_NOT_FOUND (20210730/psargs-330)
Jul 25 08:58:46 thibworldpx2 kernel:
Jul 25 08:58:46 thibworldpx2 kernel: No Local Variables are initialized for Method [_PLD]
Jul 25 08:58:46 thibworldpx2 kernel:
Jul 25 08:58:46 thibworldpx2 kernel: No Arguments are initialized for method [_PLD]
Jul 25 08:58:46 thibworldpx2 kernel:
Jul 25 08:58:46 thibworldpx2 kernel: ACPI Error: Aborting method \_SB.PC00.TXHC.RHUB.SS03._PLD due to previous error (AE_NOT_FOUND) (20210730/psparse-529)
Jul 25 08:58:46 thibworldpx2 kernel: ACPI BIOS Error (bug): Could not resolve symbol [\_SB.UBTC.RUCC], AE_NOT_FOUND (20210730/psargs-330)
Jul 25 08:58:46 thibworldpx2 kernel:
Jul 25 08:58:46 thibworldpx2 kernel: No Local Variables are initialized for Method [_PLD]
Jul 25 08:58:46 thibworldpx2 kernel:
Jul 25 08:58:46 thibworldpx2 kernel: No Arguments are initialized for method [_PLD]
Jul 25 08:58:46 thibworldpx2 kernel:
Jul 25 08:58:46 thibworldpx2 kernel: ACPI Error: Aborting method \_SB.PC00.TXHC.RHUB.SS04._PLD due to previous error (AE_NOT_FOUND) (20210730/psparse-529)

 

[LnxBil]

Yes, those error will probably not go away. Have you tried a new bios version? In general, you cannot do anything about it and can just ignore it.

If you really want to dig into this (99,99999% of all people don't want or can't do this):
Try to decompile your DSDT, fix your errors and recompile it. I had to do this 15 years ago and it was no fun, but it solved my ACPI error messages.

 

[jaytee129]

Yes, those error will probably not go away. Have you tried a new bios version?

I did check for that and there's no newer BIOS at this point. In fact as I recall the BIOS is less than a year old and possibly no more than 6 months old.

The question is what do the messages indicate is wrong? I can send note to the vendor and manufacturer about this. If anyone can decipher the meaning of the messages that would help. I'll tell them either way but the more info the better.

 

[LnxBil]

The question is what do the messages indicate is wrong?

The manufacturer did something wrong and there is something missing that should be there.

I can send note to the vendor and manufacturer about this.

You can, but I doubt it'll help.

If anyone can decipher the meaning of the messages that would help.

The entry with the name SB.UBTC.RUCC (first child of /) is missing. There is nothing else stated. You need to go through the steps in the linked article above if you want to get more information. You can also google more about already found bugs with respect to ACPI, but those messages are so common, that you will most probably find thousands of entries.

Unless you have a real impact (not-working hardware), I recommend to just ignore the messages.