[Bug 101302] New: no Intel HDMI video output with kernel 4.4 and 4.9

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101302

            Bug ID: 101302
           Summary: no Intel HDMI video output with kernel 4.4 and 4.9
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: stef at zechner77.de
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org
     i915 platform: HSW
     i915 features: display/HDMI

Hi,

after kernel upgrade to 4.9 (Debian 9) I don't get any video signal for my
onboard Intel HDMI output any more.
Grub menu and the first few seconds after loading the kernel are fine, but HDMI
output is blanked at the time the console font size is changing and xorg is
starting.
No issues with the monitor connected to DVI.

Loading old kernel 3.16 and everything is fine again.

System environment:
- Intel(R) Core(TM) i5-4570 CPU @ 3.20GHz (family: 0x6, model: 0x3c, stepping:
0x3)
- DMI: ASUS All Series/H87-PRO, BIOS 1101 03/03/2014

-- xserver-xorg-video-intel: 2:2.99.917+git20161206-1 
-- xserver: 1:7.7+19
-- mesa: 13.0.6-1+b2
-- libdrm: 2.4.74-1
-- kernel: 4.4 and 4.9
-- Linux distribution: Debian 9 and Ubuntu 16.04
-- Display connector: onboard HDMI

To check that this problem is not related to Debian 9, I installed Ubuntu 16.04
which is using kernel 4.4 and is shows the same issue. Old Ubuntu 14.04 with
kernel 3.13 is ok again.
So I guess the HDMI output was screwed up for my system in the early versions
of kernel 4.x

I don't see any related error messages (dmesg and xorg log)

BR
Stefan

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