linux-kernel - Re: Linux 4.4.4 [regression]

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <56DC2E27.2080006@web.de>
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.