https://bugs.freedesktop.org/show_bug.cgi?id=103370

--- Comment #9 from Shih-Yuan Lee <fourdollars@gmail.com> ---
I have tried acpi_osi="Windows 2009", "Windows 2012", "Windows 2013" and
"Windows 2015" on the latest mainline kernel 4.14rc6, and they all have the
same errors and halt the system.
The BIOS is also up to date.

(In reply to Mike Lothian from comment #8)
> Hmm, I notice these errors:
> 
> [    2.050887] [drm:radeon_acpi_init [radeon]] Call to ATCS verify_interface
> failed: -5
> [    2.050994] [drm:radeon_acpi_init [radeon]] Call to ATIF verify_interface
> failed: -5
> 
> which I think are ACPI calls, it might be worth checking your BIOS/EFI is up
> to date and if that doesn't fix things maybe play around with the acpi_osi=
> options

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