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Date: Fri, 18 Nov 2011 12:08:49 +0200
From: Eial Czerwacki <eial@scalemp.com>
Organization: ScaleMP
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To: linux-kernel@vger.kernel.org
Subject: Re: screen goes black suddenly while using drm/radeon and reboot
 of X is needed
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On 11/18/2011 12:06 PM, Eial Czerwacki wrote:

> Hello All,
> 
> I have a two seat multiseat config using two gpus.
> when I first boot the computer and starts to work with seat 0, after a
> few minutes my screen goes black and it behaves like it went to sleep.
> 
> the system has two gpus, seat 1 uses an ati 5450HD at slot 1
> (pcie2.0x16) and seat 0 uses an ati 3650HD at slot 1 (pciex4).
> 
> this only happens after cold reboot/power cycle, after I restart X, it
> doesn't happens again.
> 
> also this doesn't occurs on seat 1 so I suspect it has to do with the
> pci slot.
> 
> I've manually disabled DPMS in X but I don't think that is the issue.
> 
> I'm using kernel 3.1.1, my dmesg can be found at
> http://pastebin.com/TZHvDWNe and my lspci can be found at
> http://paste.pocoo.org/show/509652/
> 
> any ideas what can cause it?
> 
> Thanks
> 
> Eial.
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correction, seat 0's gpu uses slot 6.

Eial.