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Date: Sun, 6 Mar 2016 14:18:31 +0100 From: Jörg-Volker Peetz <jvpeetz@....de> To: Greg KH <gregkh@...uxfoundation.org> Cc: linux-kernel@...r.kernel.org, Andrew Morton <akpm@...ux-foundation.org>, torvalds@...ux-foundation.org, stable@...r.kernel.org, lwn@....net, Jiri Slaby <jslaby@...e.cz>, Alex Deucher <alexander.deucher@....com> Subject: Re: Linux 4.4.4 [regression] 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@....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@....com> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.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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