Softlockup on boot with Cape Verde XT on many kernels

[Federico]

Ubuntu 14.10 (kernel is 3.16.0) with nomodeset also boots. But it seems to
be using the a generic driver

cat /var/log/kern.log | grep ERROR
Jan 11 20:07:56 ubuntu kernel: [    6.174086] [drm:radeon_init] *ERROR* No
UMS support in radeon module!
Jan 11 20:07:56 ubuntu kernel: [   54.093686] [drm:radeon_init] *ERROR* No
UMS support in radeon module!
Jan 11 20:08:10 ubuntu kernel: [   94.983647] [drm:radeon_init] *ERROR* No
UMS support in radeon module!

glxinfo | grep Open
OpenGL vendor string: VMware, Inc.
OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 3.5, 128 bits)
OpenGL version string: 3.0 Mesa 10.3.0
OpenGL shading language version string: 1.30
OpenGL context flags: (none)
OpenGL extensions:


2015-01-11 19:44 GMT+00:00 Federico <federicotg at gmail.com>:

>
>
> 2015-01-11 14:19 GMT-03:00 Alex Deucher <alexdeucher at gmail.com>:
>
>> Booting with nomodeset disables the graphics drivers so if you are
>> still getting problems, it may a hardware problem.  Can you attach
>> your full dmesg and lspci output?  Are you disabling the onboard
>> graphics when enabling the external dGPU?
>>
>> Alex
>>
>
> I attached those outputs to
> https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973
> I wasn't sure if you meant attaching to this response.
>
> I was able to boot with nomodeset into Ubuntu 15.04's image. I get to a
> graphic log in screen, but I also get some errors in the kernel log
>
> [drm:radeon_init] *ERROR* No UMS support in radeon module!
>
> Which seems by design so I assume the VESA driver was in use.
>
> I will try to boot Ubuntu 14.10 live image with nomodeset to see if I can
> get some error messages there.
>
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