Re: Softlockup on boot with Cape Verde XT on many kernels

[Federico <federicotg@xxxxxxxxx>]

No, with nomodeset I don't have the softlockup and I can boot, but Xorg does not load the radeon driver.

The kernel logs some radeon errors

$ dmesg | grep drm
[    6.139753] [drm] Initialized drm 1.1.0 20060810
[    6.173103] [drm] VGACON disable radeon kernel modesetting.
[    6.173153] [drm:radeon_init] *ERROR* No UMS support in radeon module!
[   50.032476] [drm] VGACON disable radeon kernel modesetting.
[   50.032494] [drm:radeon_init] *ERROR* No UMS support in radeon module!
[   89.408520] [drm] VGACON disable radeon kernel modesetting.
[   89.408526] [drm:radeon_init] *ERROR* No UMS support in radeon module!

Here's Xorg.log. It tries to load radeon, but then in unloads it.

https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+attachment/4296840/+files/Xorg.0.log

I also checked the bios and yes, the IGP is disabled and the setting is set to start from the PCI Express slot.

2015-01-12 21:48 GMT+00:00 Alex Deucher <alexdeucher@xxxxxxxxx>:

On Sun, Jan 11, 2015 at 3:27 PM, Federico <federicotg@xxxxxxxxx> wrote:
> Ubuntu 14.10 (kernel is 3.16.0) with nomodeset also boots. But it seems to
> be using the a generic driver

Right.  As I mentioned, using nomodeset disables the gfx driver and
you end up with fw drivers (vesa of efifb).  Do you still have the
issue even with nomodeset as you previously stated?

Alex

>
> 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@xxxxxxxxx>:
>>
>>
>>
>> 2015-01-11 14:19 GMT-03:00 Alex Deucher <alexdeucher@xxxxxxxxx>:
>>>
>>> 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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