| Summary: | ACPI throws warning when executing _DSM | ||||||
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| Product: | xorg | Reporter: | Christian Wehrmeyer <c.wehrmeyer> | ||||
| Component: | Driver/nouveau | Assignee: | Nouveau Project <nouveau> | ||||
| Status: | RESOLVED WONTFIX | QA Contact: | Xorg Project Team <xorg-team> | ||||
| Severity: | normal | ||||||
| Priority: | medium | CC: | peter | ||||
| Version: | unspecified | ||||||
| Hardware: | x86-64 (AMD64) | ||||||
| OS: | Linux (All) | ||||||
| Whiteboard: | |||||||
| i915 platform: | i915 features: | ||||||
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The warning can be safely ignored. Some ACPI firmware expect the non-standard Buffer type and fail if you pass a Package type. Hence nouveau always passes a Buffer which is against the ACPI standard, which triggers this unavoidable warning. |
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Created attachment 100622 [details] ACPI tables and kern.log Dunno if I am right here ... Ilja Mirkin from the nouveau mailing list sent me here. Also English is not my native language, so please cut me some slack. In order to trace a machine hangup I contacted the nouveau guys. Mirkin told me to file a bug here because when the kernel executes _DSM, it throws off two warnings: Jun 6 21:56:21 asgard kernel: [ 1.966614] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140214/nsarguments-95) Jun 6 21:56:21 asgard kernel: [ 1.966657] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140214/nsarguments-95) I am using the 3.15-rc8 kernel and can reproduce the warning with each boot. Attached is my complete kern.log and my extracted ACPI tables. I will provide you with additional informations if you need them, just let me know.