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msimpason

Member

Registered: 2017-08-19

Posts: 18

ACPI Error in boot when bbswitch loads

Hi

I'm using a Lenovo Y50-70 with a GTX 960M GPU.

Yesterday I installed intel-ucode together with nvidia package, bbswitch and some libraries.

Now I get this error on boot:

[    4.439553] bbswitch: Found integrated VGA device 0000:00:02.0: \_SB_.PCI0.GFX0
[    4.439559] bbswitch: Found discrete VGA device 0000:01:00.0: \_SB_.PCI0.PEG0.PEGP
[    4.439574] ACPI Warning: \_SB.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20170831/nsarguments-100)
[    4.439691] bbswitch: detected an Optimus _DSM function
[    4.439701] pci 0000:01:00.0: enabling device (0006 -> 0007)
[    4.439742] ACPI Error: [AR02] Namespace lookup failure, AE_NOT_FOUND (20170831/psargs-364)
[    4.439813] ACPI Error: Method parse/execution failed \_SB.PCI0.PEG0._PRT, AE_NOT_FOUND (20170831/psparse-550)
[    4.440006] bbswitch: Succesfully loaded. Discrete card 0000:01:00.0 is on
[    4.478736] i8042: PNP: PS/2 Controller [PNP0303:PS2K,PNP0f13:MSS1] at 0x60,0x64 irq 1,12
[    4.506100] serio: i8042 KBD port at 0x60,0x64 irq 1
[    4.506132] serio: i8042 AUX port at 0x60,0x64 irq 12
[    4.506656] ACPI: bus type USB registered

I couldn't found any info about this specific error. I encountered the possible hotfix of disabling ACPI in BIOS, but I'm not sure I like this idea.

radiomike

Member

Registered: 2013-12-19

Posts: 73

Re: ACPI Error in boot when bbswitch loads

This isn't really an error. In order to determine which ACPI namespace your card is using, bbswitch tries a few options, the one(s) that don't exist on your system will throw this error. As you can see bbswitch continues to load.

msimpason

Member

Registered: 2017-08-19

Posts: 18

Re: ACPI Error in boot when bbswitch loads

This isn't really an error. In order to determine which ACPI namespace your card is using, bbswitch tries a few options, the one(s) that don't exist on your system will throw this error. As you can see bbswitch continues to load.

Can I prevent these lines from appearing?

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 21,657

Re: ACPI Error in boot when bbswitch loads

You can set the loglevel that it shouldn't print out error messages, this will be global however and AFAIK there's no ACPI specific toggle for this, this is discouraged as potential real issues will be masked as well. So for all intents and purposes you cannot (there might be some that advise you to set acpi=off or similar, that is highly discouraged and might lead to actual loss of functionality).

msimpason

Member

Registered: 2017-08-19

Posts: 18

Re: ACPI Error in boot when bbswitch loads

You can set the loglevel that it shouldn't print out error messages, this will be global however and AFAIK there's no ACPI specific toggle for this, this is discouraged as potential real issues will be masked as well. So for all intents and purposes you cannot (there might be some that advise you to set acpi=off or similar, that is highly discouraged and might lead to actual loss of functionality).

I see.. That setting is what I was talking about in the main post. Thank you

Please keep the thread open in case anyone knows how to prevent this specific error from appearing.

Last edited by msimpason (2018-04-21 11:07:02)