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SubjectRe: Dropped IRQ disables Radeon 3D
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On Fri, 15 Jul 2011 19:09:44 +1000, Benjamin Herrenschmidt wrote:

> On Fri, 2011-07-15 at 08:20 +0000, Michael Witten wrote:
>>
>> Arnuschky wrote to me about this related Debian bug report:
>>
>> Fri, 2010-06-18 10:21:05 +0000
>> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=586312
>>
>> I popped over to #radeon on freenode where user agd5f told me to
>> try the following on the kernel command line:
>>
>> pci=nomsi
>>
>> After reading about MSIs and the requisite CONFIG_* settings, I
>> realized that I didn't even have MSI support in the kernel anyway.
>> Then agd5f suggested the following patches by Benjamin Herrenschmidt
>> might be of help:
>
> Another problem I noticed is some cards, when not using MSIs, still seem
> to shoot an MSI with whatever value was last programmed into the MSI
> configuration space. Can you check with lspci -vv if there's a non-0
> value in there ? It -could- be that your get bogus MSIs.

So, you want me to boot my Linux version that doesn't have MSI support
and check whether `sudo lspci -vv' says that it is using MSIs?


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