Lenovo W540 blank screen on suspend/resume after update

[Adrian Chadd]

hi!

So this patch makes your video pop back up again after suspend?

Would you mind creating a new PR for this and putting the patch in it?

That way we can track what we eventually need to MFC to stable/10.

Thanks!


-adrian


On 17 November 2014 10:21, Chagin Dmitry <dchagin at freebsd.org> wrote:
> On Fri, Nov 14, 2014 at 03:33:26PM -0500, Eric McCorkle wrote:
>> Sorry, don't remember the working version.
>>
>> I have acpi_video compiled in to my kernel. I've tried it with both vt and sc and gotten the same result.
>>
>> Might try to do more diagnostics this weekend.
>>
>> On November 14, 2014 11:18:57 AM EST, Chagin Dmitry <dchagin at freebsd.org> wrote:
>> >On Thu, Nov 13, 2014 at 02:13:35PM -0800, Adrian Chadd wrote:
>> >> Hi,
>> >>
>> >> Does it stay blank if you have acpi_video (+ vt) loaded?
>> >>
>> >> What was the revision of 11 you were previously running?
>> >>
>> >>
>> >>
>> >> -adrian
>> >>
>> >>
>> >> On 13 November 2014 14:10, Eric McCorkle <eric at metricspace.net>
>> >wrote:
>> >> > Hello,
>> >> >
>> >> > I updated my kernel and userland with a fresh update from 11
>> >yesterday, and
>> >> > I'm now seeing a blank screen after suspend/resume, where it was
>> >working
>> >> > fine previously.
>> >> >
>> >> > I had been trying out the new vt console, so I switched back to sc,
>> >but the
>> >> > blank screen is still there.
>> >> >
>> >> > Sorry, I don't have any information beyond this (quite busy these
>> >days).
>> >> >
>> >> > Eric
>> >
>> >
>> >Lenovo t540, same here. r274463 + sc. resume worked two weeks ago.
>> >
>> >
>> >--
>> >Have fun!
>> >chd
>>
>
> try attached patch. it seems we should take a close look to other
> PCIB_POWER_FOR_SLEEP() calls.
>
> --
> Have fun!
> chd