[Bug 56931] Using xbmc disconnects screen

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=56931

--- Comment #10 from Alex Deucher <agd5f at yahoo.com> ---
(In reply to comment #9)
> After removing a discrete nvidia card from the system, the problem
> disappeared in all kernels. Also 3.7-kernels started to boot without
> panicing...
> 
> Odd though, since the card wasn't used to ouput any video, only for
> computation (and didn't have to be used for that either for these problems
> to occur).
> 
> But I would still like to debug this problem, as I would like to run cuda on
> that card while still using the APU to run the monitors. I just don't know
> what steps to take, so hints are appreciated.

Ah, ok, that's the problem.  Try putting the nvidia card into another slot. 
Some of the APU display lanes are shared with pcie lanes so you can only use
one or the other.  On your board it looks like the DP connector is using the
shared lanes.  The bios should disable the connectors served by those lanes
when a pcie card is present, but it looks like your board is not disabling them
properly.  You might try a newer bios revision if one is available, or moving
the discrete card to another slot, or checking to see if there are any special
bios options regarding the pcie slot and display lanes.

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