RADEON(0): [drm] Failed to open DRM device: No such file or directory error

[StompDagger1@yahoo.com]

>On Saturday, March 8, 2014 9:01 PM, Alex Deucher <alexdeucher at gmail.com> wrote:
 
>On Sat, Mar 8, 2014 at 2:56 AM, StompDagger1 at yahoo.com
>
><stompdagger1 at yahoo.com> wrote:
>> greetings,
>>
>> since I've updated my kernel to 3.13.x I'm unable to start X on my radeon
>> cards.
>>
>> the setup works great in kernel 3.12.8, here is part of Xorg log for that
>> adaper:
>> [    51.782] (II) [KMS] Kernel modesetting enabled.
>> [    51.782] (II) RADEON(0): RADEONPreInit_KMS
>> [    51.782] (II) RADEON(0): Creating default Display subsection in Screen
>> section
>>         "Default Screen Section" for depth/fbbpp 24/32
>> [    51.782] (==) RADEON(0): Depth 24, (--) framebuffer bpp 32
>> [    51.782] (II) RADEON(0): Pixel depth = 24 bits stored in 4 bytes (32 bpp
>> pixmaps)
>> [    51.782] (==) RADEON(0): Default visual is TrueColor
>> [    51.782] (==) RADEON(0): RGB weight 888
>> [    51.782] (II) RADEON(0): Using 8 bits per RGB (8 bit DAC)
>> [    51.782] (--) RADEON(0): Chipset: "ATI Radeon HD 3600 XT" (ChipID =
>> 0x9598)
>> [    51.829] (EE) RADEON(0): [drm] Failed to open DRM device for
>> pci:0000:06:00.0: No such file or directory
>> [    51.829] (EE) RADEON(0): Kernel modesetting setup failed
>> [    51.829] (II) RADEON(0): RADEONFreeScreen
>> [    51.829] (II) UnloadModule: "radeon"
>> [    51.829] (EE) Screen(s) found, but none have a usable configuration.
>> [    51.829] (EE)
>> Fatal server error:
>> [    51.829] (EE) no screens found(EE)
>> [    51.829] (EE)
>> Please consult the The X.Org Foundation support
>>          at http://wiki.x.org
>>
>> is that a X bug? what is the right place to debug it, X or xf86-video-ati?>
>
>There's some problems with your kernel.  Check your dmesg output and
>make sure the radeon kernel driver loaded properly.  Depending on your
>setup you may be missing the necessary firmware files from your
>initrd.
>
>Alex

Greetings Alex,

I've double checked both my kernel config and dmesg but haven't found any issue, I might be missing it thought.
my fw files are built into the kernel,

here are some outputs:
dmesg: http://bpaste.net/show/186582/
kernel config: http://bpaste.net/show/186583/
lspci: http://bpaste.net/show/186584/

note that my setup is a multiseat setup and both of my radeon cards are showing the same symptoms.
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