[Bug 106659] New: No signal after switch from HDM1 to HDM2 and return in HDM1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106659

            Bug ID: 106659
           Summary: No signal after switch from HDM1 to HDM2 and return in
                    HDM1
           Product: DRI
           Version: DRI git
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: blocker
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: stefano.ruzzon at icloud.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 139768
  --> https://bugs.freedesktop.org/attachment.cgi?id=139768&action=edit
Xorg.log

Hi,

...First of all sorry for grammatical errors, I'm using an online translator...

So, I have an NUC7PJYH and have this problem :

When i shift from HDM1 (kodi) to HDM2 (sky) and return to HDM1(kodi) i lost the
signal.
To get back the signal I have to restart the system.

I tried any version of the kernel and also the drivers available but I always
get the same result: No signal.


Some info in attached files


I also tried the "possible" fix of Clinton Taylor :
"A simple msleep(50); at the end of intel_ddi_disable_transcoder_func() appears
to resolve the issue. This is also a W/A and not the final solution."

And 
"In intel_hdmi.c  mothod hdmi_12bpc_possible()add return false;"

But I had no luck

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