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RE: [Xen-users] nvidia drivers do not seem to work on xen kernels

>-----Original Message-----
>From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-users-
>bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Jorg Lotze
>Sent: Thursday, May 19, 2011 12:10 AM
>To: xen-users@xxxxxxxxxxxxxxxxxxx
>Subject: Re: [Xen-users] nvidia drivers do not seem to work on xen kernels
>On Wed, 2011-05-18 at 16:49 +0200, ubik pl wrote:
>> Read this: http://wiki.qubes-os.org/trac/wiki/InstallNvidiaDriver
>> cat /etc/modprobe.d/nouveau-disable.conf
>> # blacklist isn't enough...
>> install nouveau /bin/true
>> Add rdblacklist=nouveau option to /boot/grub/menu.lst (at the end of
>> line containing vmlinuz).
>I am really sure that noveau isn't loaded. First, nvidia-settings in X
>reports that the nvidia driver is used. Second, lsmod | grep noveau shows
>nothing. Third, everything works fine when I boot the exact same system
>with a non-xen kernel, including the CUDA/OpenCL tests. So this is not the

I am also sure that it is not the case (nouveau). 

I installed opensuse11.4 as a last trial. 

But I've got same error with the trial before (centos 5.5, xen provided by 

Let me elaborate little bit. 

 1. nvidia-smi works fine
 2. devicequery also works fine.
 3. except devicequery, all applications fail. Error message is same " 
cudaSafeCall() Runtime API error : all CUDA-capable devices are busy or 

Nvidia-smi & device query means it is possible to access the device correctly. 

I guess,,, the problem is cudasafecall doesn't work at all even though the 
function is used in almost all GPU programs. 

I hope somebody to break this monster.. 

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