[Intel-gfx] [REGRESSION] i915: No HDMI output with 4.4

[Oleksandr Natalenko]

4.5-rc3 is affected as well:

===
kernel: [drm] Initialized drm 1.1.0 20060810
kernel: [drm] Memory usable by graphics device = 2048M
kernel: [drm] Replacing VGA console driver
kernel: [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
kernel: [drm] Driver supports precise vblank timestamp query.
kernel: [drm] Initialized i915 1.6.0 20151218 for 0000:00:02.0 on minor 
0
kernel: i915 0000:00:02.0: No connectors reported connected with modes
kernel: [drm] Cannot find any crtc or sizes - going 1024x768
kernel: i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
===

Will try to apply the following dirty workaround:

https://lkml.org/lkml/2016/1/19/637

I guess the problem described via the link above is not fixed yet:

> This issue is still present in 4.5-rc1.

Stay tuned.

09.02.2016 12:11, Daniel Vetter написав:
> Can you please retest with latest -rc? There's been some bugs in the 
> HDMI
> detection changes, which should be fixed now.
> 
> If that doesn't help please try to bisect which exact change caused the
> regression.
> 
> Thanks, Daniel