Comment # 6 on bug 1137799 from Joerg Roedel

(In reply to Takashi Iwai from comment #5)
> Thanks.  The dmesg shows
> 
> [    0.164138] AMD-Vi: [Firmware Bug]: : IOAPIC[4] not in IVRS table
> [    0.164141] AMD-Vi: [Firmware Bug]: : IOAPIC[5] not in IVRS table
> [    0.164143] AMD-Vi: [Firmware Bug]: : No southbridge IOAPIC found
> [    0.164144] AMD-Vi: Disabling interrupt remapping

Yes, these messages report a BIOS bug in the IVRS table setup, but I doubt that
this is relevant for the issue discussed here. The IVRS bug only prevents
interrupt remapping from getting enabled, normal IRQ routing should still work.

> that indicates a BIOS bug, and that's the possible cause that screws up the
> interrupts setup after hibernation resume.
> 
> Could you try to boot with amd_iommu_dump=1 kernel option and give the
> kernel boot messages?
> 
> Adding Joerg to Cc, as this seems relevant with AMD IOMMU.

I don't think it has to do with the AMD IOMMU, as the parts that would use the
buggy BIOS settings are not active.