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Bug 1250128 - segfault in libmutter.so.0.0.0
Summary: segfault in libmutter.so.0.0.0
Keywords:
Status: CLOSED DUPLICATE of bug 1212702
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: gnome-shell
Version: 7.2
Hardware: Unspecified
OS: Linux
high
high
Target Milestone: rc
: ---
Assignee: Florian Müllner
QA Contact: Desktop QE
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2015-08-04 14:59 UTC by Vladimir Benes
Modified: 2015-09-15 16:38 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2015-09-15 16:38:30 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
backtrace (8.48 KB, text/plain)
2015-08-04 15:00 UTC, Vladimir Benes 		no flags Details
journalctl logs (853.40 KB, text/x-vhdl)
2015-09-08 18:59 UTC, amit yadav 		no flags Details
View All

Description Vladimir Benes 2015-08-04 14:59:11 UTC 
Description of problem:
when starting gdm, gnome-shell crashes with following issue:
[ 2124.142268] gnome-shell[15995]: segfault at 0 ip 00007f5f1f4e84ec sp 00007ffe76951640 error 4 in libmutter.so.0.0.0[7f5f1f46c000+e8000] 

gdb backtrace will be attached

Version-Release number of selected component (if applicable):
mutter-3.14.4-10.el7.x86_64
gnome-shell-3.14.4-24.el7.x86_64
gdm-3.14.2-10.el7.x86_64
kernel-3.10.0-302.el7.x86_64

00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller (rev 08)

I would say no monitor (remote machine)

How reproducible:
randomly

Steps to Reproduce:
1.start gdm service

Actual results:
gnome-shell --mode=gdm running for a while -> crash

Expected results:


Additional info:
Comment 1 Vladimir Benes 2015-08-04 15:00:43 UTC 
Created attachment 1059120 [details]
backtrace
Comment 2 Florian Müllner 2015-08-04 16:28:17 UTC 
(In reply to Vladimir Benes from comment #0)
> I would say no monitor (remote machine)

Is this a duplicate of bug 1212702 then? In any case, the backtrace is helpful ...
Comment 3 Matthias Clasen 2015-08-18 13:18:06 UTC 
Florian, did you have any insight in this ?
Comment 4 Florian Müllner 2015-09-04 11:49:08 UTC 
(In reply to Matthias Clasen from comment #3)
> Florian, did you have any insight in this ?

Not anymore than in comment #2 - if this is indeed on a headless machine, this is a duplicate of bug 1212702 (which is known not to be fully fixed yet, but progress on that is slow as I don't actually have access to hardware that allows booting without monitors)
Comment 5 amit yadav 2015-09-08 18:57:48 UTC 
Facing similar issue on my test system. I have configured Xdmcp on RHEL7.2 Beta.
System console is working fine, but when I try to connect this system from other RHEL/fedora system using "Xnest/Xephyr", I am getting black screen. If I try to connect from Windows system using Cygwin/MobaXterm/Xming,  I am getting following error:

   "Oh no! Something has gone wrong."


  "journalctl -b -a" output file : journalctl.logs attached to the bug.
Comment 6 amit yadav 2015-09-08 18:59:09 UTC 
Created attachment 1071454 [details]
journalctl logs
Comment 7 Joe Lawrence 2015-09-09 19:54:34 UTC 
Hi Amit, et al -- I noticed a similar segfault when starting gdm on 7.2 Alpha and Beta.  We run with a /etc/X11/xorg.conf.d/00-ftserver.conf file that contains:

  Section "ServerFlags"
          Option          "RandR" "false"
  EndSection

which X appears to honor:

  % grep -i randr /var/log/Xorg.0.log
  [  3544.109] (**) Option "RandR" "false"
  [  3544.408] (**) RandR disabled

but then there are several "Xlib:  extension "RANDR" missing on display ":0" complaints out of gdm and gnome-session before gnome-shell eventually segfaults.

If I comment out the 'Option "RandR" "false"' line from the config file, gdm starts successfully.

I happened to notice similar complaints in your journalctl logs so I thought I would chime in.

Do you know if the randr extension is a *requirement* for gnome in 7.2?

Thanks,

-- Joe
Comment 8 Ray Strode [halfline] 2015-09-15 16:38:30 UTC 
let's dupe this on to bug 1212702 since they're essentially the same problem.

*** This bug has been marked as a duplicate of bug 1212702 ***
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