Re: Blank screen on resume

[Eric McCorkle]

I think I will give that a shot, actually...  It seems pretty unfortunate that 
we'd have to wait for full 3D graphics support on a card in order to get resume 
working.

I can't guarantee success, of course. 

On March 14, 2016 4:49:51 PM EDT, Adrian Chadd  wrote:
>On 14 March 2016 at 13:22, Eric McCorkle  wrote:
>> So no options at all until then? :(
>
>If you want to figure out what minimal set you need from the
>dri/i915kms code to restore backlight happiness, please do. :-P
>
>But yeah. We'll need to wait for the next dri sync
>
>
>-adrian
>
>>
>> On March 14, 2016 3:43:08 PM EDT, Adrian Chadd
>
>> wrote:
>>>
>>> Hiya,
>>>
>>> Yeah - the drm2 code needs to be involved in resuming, and right now
>>> there's no broadwell support in i915kms.
>>>
>>> Once that gets updated then yeah, the resume backlight will work.
>:-P
>>>
>>>
>>>
>>> -a
>>
>>
>> --
>> Sent from my Android device with K-9 Mail. Please excuse my brevity.

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Re: Blank screen on resume

[Adrian Chadd]

On 14 March 2016 at 13:22, Eric McCorkle  wrote:
> So no options at all until then? :(

If you want to figure out what minimal set you need from the
dri/i915kms code to restore backlight happiness, please do. :-P

But yeah. We'll need to wait for the next dri sync


-adrian

>
> On March 14, 2016 3:43:08 PM EDT, Adrian Chadd 
> wrote:
>>
>> Hiya,
>>
>> Yeah - the drm2 code needs to be involved in resuming, and right now
>> there's no broadwell support in i915kms.
>>
>> Once that gets updated then yeah, the resume backlight will work. :-P
>>
>>
>>
>> -a
>
>
> --
> Sent from my Android device with K-9 Mail. Please excuse my brevity.
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Re: Blank screen on resume

[Eric McCorkle]

So no options at all until then? :(

On March 14, 2016 3:43:08 PM EDT, Adrian Chadd  wrote:
>Hiya,
>
>Yeah - the drm2 code needs to be involved in resuming, and right now
>there's no broadwell support in i915kms.
>
>Once that gets updated then yeah, the resume backlight will work. :-P
>
>
>
>-a

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Re: Blank screen on resume

[Eric McCorkle]

Note: I've moved the patch and logs to a new branch: 
https://github.com/emc2/freebsd/tree/resume_blank_screen


On March 12, 2016 10:39:42 PM EST, Eric McCorkle  wrote:
>Hello everyone,
>
>It seems I'm plagued by blank screens on resume again on a different
>laptop... *sigh*
>
>I've done quite a bit of diagnostic work on this, and there seem to be
>some clues, but I'm a bit stumped at this point.  The following github
>repo has patches that add extra logging, which has proven useful in my
>attempts to diagnose the issue: https://github.com/emc2/freebsd (sorry
>for distributing patches/logs in this way, but the logs are quite big).
>Also in this repo, there's a pciconf, devinfo, and dmesg file.  The
>dmesg file shows the trace from booting a patched kernel in verbose
>mode then suspending it.
>
>There's two main curiosities in the dmesg trace.  The first is that the
>power state of all the vgapci device seems to be 0 as opposed to 3
>during resume, which was causing acpi_set_powerstate_method to skip
>resetting its power during resume.  I tried a simple patch (you can see
>it in the patch and its effects in the trace), but that didn't seem to
>work.  A second curiosity is that acpi_pwr_switch_consumer only seems
>to have an effect during resume.
>
>The only other real lead I have is that the display doesn't seem to be
>active in acpi_video.  I'm not sure if this is an artifact of the efifb
>driver.
>
>Lastly, I recall looking into vga bios calls from earlier such efforts.
>I imagine there's something similar for efifb, but I've been unable to
>track down where this is happening.  Advice or information on that
>front would be much appreciated.
>
>Best,
>Eric
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Re: Blank screen on resume

[Eric McCorkle]

Laptop is the librem 13 (not helpful, I know). 

Graphics chipset is broadwell.  Cpu is i5-5200.

Haven't been able to get the motherboard model. However, I have model numbers 
from the bios. 

Bios is American Megatrends.

BIOS Version is 108.
EC version is 2.1u. 
M/B version is D. 

On March 12, 2016 11:45:00 PM EST, Adrian Chadd  wrote:
>Hi,
>
>Which laptop? Which chipset? etc.
>
>
>
>-adrian

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