Date: Sat, 5 Mar 2016 09:41:47 -0800
From: Greg KH <gregkh@linuxfoundation.org>
To: =?iso-8859-1?Q?J=F6rg-Volker?= Peetz <jvpeetz@web.de>
Cc: linux-kernel@vger.kernel.org, Andrew Morton <akpm@linux-foundation.org>,
        torvalds@linux-foundation.org, stable@vger.kernel.org, lwn@lwn.net,
        Jiri Slaby <jslaby@suse.cz>, Alex Deucher <alexander.deucher@amd.com>
Subject: Re: Linux 4.4.4 [regression]
Message-ID: <20160305174147.GB14401@kroah.com>
References: <20160303233415.GA30194@kroah.com>
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On Sat, Mar 05, 2016 at 11:48:45AM +0100, J?rg-Volker Peetz wrote:
> On my HP Pavilion dv7 with hybrid graphics (AMD HD 4200 - AMD 5400) X can't be
> started anymore. When trying to start X with "startx" Xorg freezes to an
> un-killable process before switching to a frame buffer. From another console I'm
> able to kill the xinit process which brings the first console back to the shell
> prompt. I can find nothing relevant in the logs.
> 
> The last few lines in Xorg.0.log are:
> 
> ...
> [    61.007] (==) ModulePath set to "/usr/lib/xorg/modules"
> [    61.007] (II) The server relies on udev to provide the list of input devices.
> 	If no devices become available, reconfigure udev or disable AutoAddDevices.
> [    61.007] (II) Loader magic: 0x5571980cbdc0
> [    61.008] (II) Module ABI versions:
> [    61.008] 	X.Org ANSI C Emulation: 0.4
> [    61.008] 	X.Org Video Driver: 20.0
> [    61.008] 	X.Org XInput driver : 22.1
> [    61.008] 	X.Org Server Extension : 9.0
> [    61.009] (++) using VT number 1
> 
> [    61.009] (EE) systemd-logind: failed to get session: The name
> org.freedesktop.login1 was not provided by any .service files
> [    61.010] (II) xfree86: Adding drm device (/dev/dri/card0)
> [    61.011] (II) xfree86: Adding drm device (/dev/dri/card1)
> 
> which are the same as with 4.4.3. There the log continues with
> 
>  [    65.782] (--) PCI:*(0:1:5:0) 1002:9712:103c:1443 rev 0, Mem @
> 0xd0000000/268435456, 0xf0400000/65536, 0xf0300000/1048576, I/O @ 0x00004000/256
> [    65.782] (--) PCI: (0:2:0:0) 1002:68e0:103c:1443 rev 0, Mem @
> 0xe0000000/268435456, 0xf0200000/131072, I/O @ 0x00003000/256, BIOS @
> 0x????????/131072
> [    65.782] (II) LoadModule: "glx"
> [    65.784] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
> [    65.801] (II) Module glx: vendor="X.Org Foundation"
> ...
> 
> I attach the config file.

Can you use 'git bisect' between 4.4.3 and 4.4.4 to track down the
offending patch?

thanks,

greg k-h