Failed to open DRM device

[Alex Deucher]

On Tue, Oct 26, 2010 at 2:53 AM, Zhang Weiwu <zhangweiwu at realss.com> wrote:
>  On 10/25/2010 11:59 PM, Luca Tettamanti wrote:
>> Zhang, is radeon module loaded *before* X is started?
> I suppose I should look for kernel document to see how to get the radeon
> module loaded and what available parameters are there (so that it
> doesn't try to probe the second VGA card). But I didn't find anything
> mentioning the radeon kernel module in kernel documents:
> http://www.kernel.org/doc/Documentation/fb/
>
> Although I do find pretty much documents about other non-ATI card's
> modules like sis, s3, matrox.
>

The driver automatically loads on all supported devices.  In most
cases multiple cards work fine, however, for some reason, it's not
able to access the vbios on one of your cards.

Alex