I don't think I'm using the Nvidia drivers on the machine I reported this
from. That would mean they could not be the route cause.

On Mon, 20 Mar 2017, 17:51 Jan Lachnitt, <email address hidden> wrote:

> Another report and some thoughts below
>
> HW: Asus Vivobook (touchscreen, Intel graphics), external monitor attached.
> OS: Linux Mint 18 Cinnamon x64.
> State before crash: Running X session using both displays ("big desktop"),
> several applications, Vivaldi browser active.
> My aim: Lock the computer.
> Course of action, the USUAL part: Pressed Ctrl+Alt+L, not locked - Vivaldi
> displayed its menu (to be displayed upon pressing Alt), tapped the
> touchscreen to get rid of the menu and thus actually lock the computer.
> Course of action, the UNUSUAL part: Black screen for a few seconds, then
> login screen, old X session gone.
>
> syslog:
> Mar 20 14:43:20 VivoBook org.a11y.atspi.Registry[1729]: XIO:  fatal IO
> error 11 (Resource temporarily unavailable) on X server ":0"
> Mar 20 14:43:20 VivoBook org.a11y.atspi.Registry[1729]:       after 2925
> requests (2925 known processed) with 0 events remaining.
> Mar 20 14:43:20 VivoBook cinnamon-session[1640]: Gdk-WARNING:
> t+4492,79569s: cinnamon-session: Fatal IO error 11 (Prostředek je dočasně
> nepřístupný) on X server :0.
> Mar 20 14:43:20 VivoBook org.gtk.vfs.Daemon[1711]: A connection to the bus
> can't be made
> Mar 20 14:43:20 VivoBook org.gtk.vfs.Daemon[1711]: A connection to the bus
> can't be made
> Mar 20 14:43:20 VivoBook mdm[1212]: WARNING: mdm_slave_xioerror_handler:
> Kritická chyba X - Restartování :0
> Mar 20 14:43:20 VivoBook kernel: [ 4538.677519] vivaldi-bin[4100]:
> segfault at 968 ip 00007f61ac384643 sp 00007ffc09f25b50 error 4 in
> libX11.so.6.3.0[7f61ac35c000+135000]
> Mar 20 14:43:20 VivoBook ag[4118]: mdm-superpost Starting...
> Mar 20 14:43:20 VivoBook ag[4122]: mdm-superpost Finished
> Mar 20 14:43:20 VivoBook console-kit-daemon[1566]: (process:4128):
> GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed
> Mar 20 14:43:21 VivoBook acpid: client 1219[0:0] has disconnected
> Mar 20 14:43:21 VivoBook acpid: client connected from 4131[0:0]
> Mar 20 14:43:21 VivoBook acpid: 1 client rule loaded
> Mar 20 14:43:22 VivoBook ag[4139]: mdm-superinit Starting...
> Mar 20 14:43:22 VivoBook ag[4140]: mdm-superinit Finished
>
> Xorg.0.log covers the new session, Xorg.0.log.old has no record of the
> event.
>
> The segfault really seems to affect multiple users, especially with
> Chromium-based browsers, e.g.:
> https://bbs.archlinux.org/viewtopic.php?id=131328 - from 2011 already
> https://bbs.archlinux.org/viewtopic.php?id=221888 - solution?
>
> I don't know if syslog preserves the order of events (within a second),
> but if yes, then the segfault is just a consequence of another problem,
> e.g.:
>
> https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers/+bug/999191
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1636564
>
> Title:
>   Segfault from libX11.so.6.3.0
>
> Status in libx11 package in Ubuntu:
>   Confirmed
>
> Bug description:
>   Something went wrong with my Ubuntu 16.04 LTS desktop today.  When I
>   got back to the system Mattermost and a Chrome were indicating that
>   the network was not working.  I started to look about and it seemed
>   that my main ethernet network connection had lost its IPv4 address
>   somehow.  ifconfig and the GUI network manager confirmed this.
>
>   To try and resolve this I physically removed the connector and the
>   plugged it back in.  Shortly after I did this my GUI seemed to die out
>   and I ended up back at the login screen.
>
>   Once everything had calmed down I logged back in.  After some digging
>   about in the logs I noticed the following in /var/log/kern.log
>
>   Oct 25 13:01:09 thorne-ul-dt kernel: [694321.877561] Mattermost[744]:
> segfault at 968 ip 00007f8a9e257643 sp 00007ffe72a3b510 error 4 in
> libX11.so.6.3.0[7f8a9e22f000+135000]
>   Oct 25 13:01:09 thorne-ul-dt kernel: [694322.029362] chrome[745]:
> segfault at 968 ip 00007fd4b5c73643 sp 00007fff94f78d90 error 4 in
> libX11.so.6.3.0[7fd4b5c4b000+135000]
>
>   That seemed to be the correct time for the problem I noticed.   What
>   exactly caused it I am not sure.
>
>   ProblemType: Bug
>   DistroRelease: Ubuntu 16.04
>   Package: libx11-6 2:1.6.3-1ubuntu2
>   ProcVersionSignature: Ubuntu 4.4.0-42.62-generic 4.4.21
>   Uname: Linux 4.4.0-42-generic x86_64
>   .tmp.unity_support_test.0:
>
>   ApportVersion: 2.20.1-0ubuntu2.1
>   Architecture: amd64
>   CompizPlugins: No value set for
> `/apps/compiz-1/general/screen0/options/active_plugins'
>   CompositorRunning: compiz
>   CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
>   CompositorUnredirectFSW: true
>   CurrentDesktop: Unity
>   Date: Tue Oct 25 17:07:28 2016
>   DistUpgraded: Fresh install
>   DistroCodename: xenial
>   DistroVariant: ubuntu
>   GraphicsCard:
>    Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor Integrated
> Graphics Controller [8086:0412] (rev 06) (prog-if 00 [VGA controller])
>      Subsystem: Gigabyte Technology Co., Ltd Xeon E3-1200 v3/4th Gen Core
> Processor Integrated Graphics Controller [1458:d000]
>   InstallationDate: Installed on 2015-03-12 (592 days ago)
>   InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64
> (20150218.1)
>   MachineType: Gigabyte Technology Co., Ltd. H81M-DS2V
>   ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-38-generic.efi.signed
> root=/dev/mapper/ubuntu--vg-root ro quiet splash crashkernel=384M-:128M
> vt.handoff=7
>   SourcePackage: libx11
>   UpgradeStatus: No upgrade log present (probably fresh install)
>   dmi.bios.date: 08/11/2015
>   dmi.bios.vendor: American Megatrends Inc.
>   dmi.bios.version: F6
>   dmi.board.asset.tag: To be filled by O.E.M.
>   dmi.board.name: H81M-DS2V
>   dmi.board.vendor: Gigabyte Technology Co., Ltd.
>   dmi.board.version: x.x
>   dmi.chassis.asset.tag: To Be Filled By O.E.M.
>   dmi.chassis.type: 3
>   dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
>   dmi.chassis.version: To Be Filled By O.E.M.
>   dmi.modalias:
> dmi:bvnAmericanMegatrendsInc.:bvrF6:bd08/11/2015:svnGigabyteTechnologyCo.,Ltd.:pnH81M-DS2V:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnH81M-DS2V:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.:
>   dmi.product.name: H81M-DS2V
>   dmi.product.version: To be filled by O.E.M.
>   dmi.sys.vendor: Gigabyte Technology Co., Ltd.
>   version.compiz: compiz 1:0.9.12.2+16.04.20160823-0ubuntu1
>   version.ia32-libs: ia32-libs N/A
>   version.libdrm2: libdrm2 2.4.67-1ubuntu0.16.04.2
>   version.libgl1-mesa-dri: libgl1-mesa-dri 11.2.0-1ubuntu2.2
>   version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
>   version.libgl1-mesa-glx: libgl1-mesa-glx 11.2.0-1ubuntu2.2
>   version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-0ubuntu0.1
>   version.xserver-xorg-input-evdev: xserver-xorg-input-evdev
> 1:2.10.1-1ubuntu2
>   version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1
>   version.xserver-xorg-video-intel: xserver-xorg-video-intel
> 2:2.99.917+git20160325-1ubuntu1.1
>   version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
> 1:1.0.12-1build2
>   xserver.bootTime: Tue Oct 25 13:01:04 2016
>   xserver.configfile: default
>   xserver.errors:
>
>   xserver.logfile: /var/log/Xorg.0.log
>   xserver.outputs:
>    product id                               30926
>    vendor                                     BNQ
>   xserver.version: 2:1.18.4-0ubuntu0.1
>
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