Re: Info: mapping multiple BARs. Your kernel is fine.

H. Peter Anvin
2014-02-25T15:48:13Z

On 02/24/2014 12:19 PM, Borislav Petkov wrote:
> Btw,
>
> I don't know whether the following observation is related or not, but it
> so happens that after resume from suspend-to-disk, I see the booting up
> of the resume kernel on the console but when it is time for the original
> kernel to take over and switch to graphics, the screen remains black but
> the machine is responsive over the network.
>
> And this doesn't happen on every resume but only sporadically.
>
> And yep, -rc3 was fine.
>
> On Mon, Feb 24, 2014 at 05:24:00PM +0100, Borislav Petkov wrote:
>> This started happening this morning after booting -rc4+tip, let's
>> add *everybody* to CC :-)
>>
>> We have intel_uncore_init, snb_uncore_imc_init_box, uncore_pci_probe and
>> other goodies on the stack.
>>

snb_uncore_imc_init_box() is introduced new in tip:perf/core, and is a
relatively recent commit (b9e1ab6d4c0582cad97699285a6b3cf992251b00), so
I suspect that that wasn't in whatever -rc3 mix you were testing.

I am wondering if backing/disabling out that support (perhaps by
removing the relevant PCI ID) fixes the problem?

-hpa