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Re: Linux 4.4.4 [regression]

From Jörg-Volker Peetz <jvpeetz@web.de>
Newsgroups linux.kernel
Subject Re: Linux 4.4.4 [regression]
Date 2016-03-06 14:20 +0100
Message-ID <r9GLg-5vs-5@gated-at.bofh.it> (permalink)
References <r8L0C-6ep-13@gated-at.bofh.it> <r9i6e-4VN-17@gated-at.bofh.it> <r9ouZ-18t-1@gated-at.bofh.it>
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Greg KH wrote on 03/05/16 18:41:
>
> Can you use 'git bisect' between 4.4.3 and 4.4.4 to track down the
> offending patch?
>
> thanks,
>
> greg k-h
>

It's one line of code that freezes X during start on my HP Pavilion dv7 hybrid
graphic (AMD HD 42000 - AMD HD 5400):

# git bisect visualize
commit b36e52c44ce6728824546d8b5f05b844cede96f1
Author: Alex Deucher <alexander.deucher@amd.com>
Date: Tue Nov 24 14:32:44 2015 -0500

drm/radeon: call hpd_irq_event on resume

commit dbb17a21c131eca94eb31136eee9a7fe5aff00d9 upstream.

Need to call this on resume if displays changes during
suspend in order to properly be notified of changes.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Removing the line inserted by this patch from 4.4.4 makes X on my laptop work again.
Just for the records: with the above patch the laptop freezes during shutdown
and has to be switched off by pressing the power button several seconds until
power-off.

Regards,
jvp.

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Thread

Re: Linux 4.4.4 [regression] Greg KH <gregkh@linuxfoundation.org> - 2016-03-05 18:50 +0100
  Re: Linux 4.4.4 [regression] Jörg-Volker Peetz <jvpeetz@web.de> - 2016-03-06 14:20 +0100
    Re: Linux 4.4.4 [regression] Greg KH <gregkh@linuxfoundation.org> - 2016-03-07 02:20 +0100
      Re: Linux 4.4.4 [regression] Jörg-Volker Peetz <jvpeetz@web.de> - 2016-03-07 15:30 +0100
        Re: Linux 4.4.4 [regression] Linus Torvalds <torvalds@linux-foundation.org> - 2016-03-07 17:30 +0100
          RE: Linux 4.4.4 [regression] "Deucher, Alexander" <Alexander.Deucher@amd.com> - 2016-03-07 18:10 +0100
            RE: Linux 4.4.4 [regression] "Deucher, Alexander" <Alexander.Deucher@amd.com> - 2016-03-07 19:10 +0100

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