Lenovo x120e resume regression in 3.15-rc1 bisected to 'drm/crtc-helpers: fix dpms on logic'

[Alex Deucher]

On Fri, May 2, 2014 at 12:40 PM, Tim Gardner <tim.gardner at canonical.com> wrote:
> I've bisected a resume regression on a Lenovo x120e to
> 177cf92de4aa97ec1435987e91696ed8b5023130 (drm/crtc-helpers: fix dpms on
> logic). Everything works fine with this patch reverted on top of
> 3.15-rc3. I realize it is correcting a coding error that has been in
> place since 3.11, but it is also causing this laptop to resume to a
> black screen wherein the platform appears to be locked up (no console,
> no network). See attached bisect log and lspci. The BIOS version is 1.15.
>

Does the attached patch help?  I haven't had a chance to unwind all
the logic in the crtc helper code.

Alex
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0001-drm-radeon-force-connector-dpm-state-to-ON-on-modese.patch
Type: text/x-diff
Size: 1219 bytes
Desc: not available
URL: <https://lists.ubuntu.com/archives/kernel-team/attachments/20140502/598c24b9/attachment.patch>