<div dir="ltr"><div><div><div>No, with nomodeset I don't have the softlockup and I can boot, but Xorg does not load the radeon driver.<br></div>The kernel logs some radeon errors<br><br>$ dmesg | grep drm<br>[ 6.139753] [drm] Initialized drm 1.1.0 20060810<br>[ 6.173103] [drm] VGACON disable radeon kernel modesetting.<br>[ 6.173153] [drm:radeon_init] *ERROR* No UMS support in radeon module!<br>[ 50.032476] [drm] VGACON disable radeon kernel modesetting.<br>[ 50.032494] [drm:radeon_init] *ERROR* No UMS support in radeon module!<br>[ 89.408520] [drm] VGACON disable radeon kernel modesetting.<br>[ 89.408526] [drm:radeon_init] *ERROR* No UMS support in radeon module!<br><br></div><div>Here's Xorg.log. It tries to load radeon, but then in unloads it.<br><br><a href="https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+attachment/4296840/+files/Xorg.0.log">https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+attachment/4296840/+files/Xorg.0.log</a><br></div><br></div>I also checked the bios and yes, the IGP is disabled and the setting is set to start from the PCI Express slot.<br><div><div><div><div><br></div></div></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">2015-01-12 21:48 GMT+00:00 Alex Deucher <span dir="ltr"><<a href="mailto:alexdeucher@gmail.com" target="_blank">alexdeucher@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On Sun, Jan 11, 2015 at 3:27 PM, Federico <<a href="mailto:federicotg@gmail.com">federicotg@gmail.com</a>> wrote:<br>
> Ubuntu 14.10 (kernel is 3.16.0) with nomodeset also boots. But it seems to<br>
> be using the a generic driver<br>
<br>
</span>Right. As I mentioned, using nomodeset disables the gfx driver and<br>
you end up with fw drivers (vesa of efifb). Do you still have the<br>
issue even with nomodeset as you previously stated?<br>
<br>
Alex<br>
<div><div class="h5"><br>
><br>
> cat /var/log/kern.log | grep ERROR<br>
> Jan 11 20:07:56 ubuntu kernel: [ 6.174086] [drm:radeon_init] *ERROR* No<br>
> UMS support in radeon module!<br>
> Jan 11 20:07:56 ubuntu kernel: [ 54.093686] [drm:radeon_init] *ERROR* No<br>
> UMS support in radeon module!<br>
> Jan 11 20:08:10 ubuntu kernel: [ 94.983647] [drm:radeon_init] *ERROR* No<br>
> UMS support in radeon module!<br>
><br>
> glxinfo | grep Open<br>
> OpenGL vendor string: VMware, Inc.<br>
> OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 3.5, 128 bits)<br>
> OpenGL version string: 3.0 Mesa 10.3.0<br>
> OpenGL shading language version string: 1.30<br>
> OpenGL context flags: (none)<br>
> OpenGL extensions:<br>
><br>
><br>
> 2015-01-11 19:44 GMT+00:00 Federico <<a href="mailto:federicotg@gmail.com">federicotg@gmail.com</a>>:<br>
>><br>
>><br>
>><br>
>> 2015-01-11 14:19 GMT-03:00 Alex Deucher <<a href="mailto:alexdeucher@gmail.com">alexdeucher@gmail.com</a>>:<br>
>>><br>
>>> Booting with nomodeset disables the graphics drivers so if you are<br>
>>> still getting problems, it may a hardware problem. Can you attach<br>
>>> your full dmesg and lspci output? Are you disabling the onboard<br>
>>> graphics when enabling the external dGPU?<br>
>>><br>
>>> Alex<br>
>><br>
>><br>
>> I attached those outputs to<br>
>> <a href="https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973" target="_blank">https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973</a><br>
>> I wasn't sure if you meant attaching to this response.<br>
>><br>
>> I was able to boot with nomodeset into Ubuntu 15.04's image. I get to a<br>
>> graphic log in screen, but I also get some errors in the kernel log<br>
>><br>
>> [drm:radeon_init] *ERROR* No UMS support in radeon module!<br>
>><br>
>> Which seems by design so I assume the VESA driver was in use.<br>
>><br>
>> I will try to boot Ubuntu 14.10 live image with nomodeset to see if I can<br>
>> get some error messages there.<br>
><br>
><br>
><br>
</div></div>> _______________________________________________<br>
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><br>
</blockquote></div><br></div>