On Tue 30-06-15 18:59:29, Daniel Vetter wrote:
[...]
> I looked at dmesg, nothing out of the ordinary there. Unfortunately also
> no hints why the pipe is somehow off when we think it's on. Can you please
> test the below patch and grab a new dmesg?

Attached.

> Also it might be time to start bisecting this if you can readily reproduce it.

Yes, I can reproduce it just by switching to the text console. Sometimes
it is the first attempt already but sometimes it takes several attempts.
I will try to go back to 4.0 and bisect it then.

> -Daniel
> 
> diff --git a/drivers/gpu/drm/i915/intel_display.c 
> b/drivers/gpu/drm/i915/intel_display.c
> index d0f3cbc87474..b8d9314ef459 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -12190,7 +12190,7 @@ static int intel_crtc_set_config(struct drm_mode_set 
> *set)
>                * flipping, so increasing its cost here shouldn't be a big
>                * deal).
>                */
> -             if (i915.fastboot && ret == 0)
> +             if (ret == 0)
>                       intel_modeset_check_state(set->crtc->dev);
>       }
>  
> -- 
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch

-- 
Michal Hocko
SUSE Labs

Attachment: dmesg.gz
Description: application/gzip

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