Comment 20 for bug 1568211

I saw one report that said that disabling a PCI controller solved the issue
as well, but I don't know what in my laptop could be running on that,
unless it's the memory card adapter.

Do we know that anyone is working on this upstream, or are we just
installing builds hoping something will work magically? I bought this
laptop ten months ago to be a dedicated development box, and I've gotten
about two workdays out of it. I could just fall back to 14.04 at this
point with the keyboard fix and at least get stuff done.

On Wed, Jul 20, 2016 at 4:44 PM, <email address hidden> <
<email address hidden>> wrote:

> Same issue here with Radeon HD 7560D. Blank screen or resolution stuck at
> 600x800. Unusable. Sorry I cannot apport right now.
> But I noticed one thing: booting ubuntu as UEFI has the issue. Booting the
> same partition from a separate Arch partition without UEFI, loaded ubuntu
> full resolution (keeping nomodeset though). Not sure how/if this is relevant
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1568211
>
> Title:
> Unable to boot
>
> Status in linux package in Ubuntu:
> Incomplete
>
> Bug description:
> I upgraded overnight from Wily to Xenial. The system will not boot.
> Only a blank screen after grub loads the kernel.
>
> The recovery kernel loads fine and I was able to find the following
> messages:
>
> [drm] VGACON disable radeon kernel modesetting
> [drm:radeon_init [radeon]] *ERROR* no UMS support in radeon module!
>
> The recovery kernel command line had a nomodeset parameter that was
> not in the main kernel command line.
>
> Note: For what it's worth I reported a similar issue against several
> Utopic kernels (bug #1407505). There was a back and forth with
> jsalisbury until a kernel finally worked. I have had no problems until
> today.
>
> WORKAROUND: Adding the nomodeset parameter the main kernel command
> line finally booted the system.
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1568211/+subscriptions
>

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