From mboxrd@z Thu Jan  1 00:00:00 1970
From: Chris Wilson <chris@chris-wilson.co.uk>
Subject: Re: xf86-video-intel 2.20.5 does not detect
	PCI_CHIP_SANDYBRIDGE_M_GT1
Date: Thu, 30 Aug 2012 11:51:24 +0100
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On Thu, 30 Aug 2012 10:24:17 +0200, Christian Gmeiner <christian.gmeiner@gmail.com> wrote:
> [    13.840] drmOpenDevice: node name is /dev/dri/card0
> [    13.840] drmOpenDevice: open result is 7, (OK)
> [    13.840] drmOpenByBusid: Searching for BusID pci:0000:00:02.0
> [    13.840] drmOpenDevice: node name is /dev/dri/card0
> [    13.840] drmOpenDevice: open result is 7, (OK)
> [    13.840] drmOpenByBusid: drmOpenMinor returns 7
> [    13.840] drmOpenByBusid: Interface 1.4 failed, trying 1.1
> [    13.840] drmOpenByBusid: drmGetBusid reports

This is the reason why we fail to detect the device. The device node
exists but the drmSetVersion call fails, which is, of course,
completely impossible. Both Fedora and Ubuntu are tracking a race
condition in the early setup with afaict exactly this symptom.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre