[alsa-devel] M-Audio Revolution 7.1 sound card causing crash on Alpha

Michael Cree mcree at orcon.net.nz
Mon Mar 31 22:46:54 CEST 2008

On 6/03/2008, at 11:18 PM, Takashi Iwai wrote:
> At Wed, 05 Mar 2008 21:14:23 +1300, Michael Cree wrote:
>> I recently installed a M-Audio Revolution 7.1 sound card into DEC/ 
>> Compaq
>> Alpha XP1000, and it is causing crashes and complete lock ups of the
>> computer when I attempt to play sound through the sound card.  Since
>> this is my main computer I shifted the card to a DEC Alpha PWS500au  
>> and
>> it causes the same lock ups there, and in one case a kernel oops  
>> made it
>> into the system log (listed below).
> The oops looks related with mmap.  Maybe alpha doesn't support the
> mmap of coherent DMA pages like intel architectures allow?

I have just applied the recently announced patch (alpha: fix ALSA DMA  
mmap crash) in the -mm kernel tree to the kernel I am  
running.  The M-Audio Revolution 7.1 card now works fine on both  
Compaq Alpha XP1000 and the DEC Alpha PWS600au.


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