sddm-greeter crashed with SIGSEGV

[Philip Muškovac]

Happens after installing a bunch of updates on wily.
I also had the canonical-x/x-staging PPA enabled recently, but the crash still happens even after purging that.

ProblemType: Crash
DistroRelease: Ubuntu 15.10
Package: sddm 0.11.0-0ubuntu11
ProcVersionSignature: Ubuntu 4.2.0-10.11-generic 4.2.0
Uname: Linux 4.2.0-7-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.18.1-0ubuntu1
Architecture: amd64
Date: Mon Sep 14 18:14:33 2015
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/sddm-greeter
InstallationDate: Installed on 2015-07-20 (59 days ago)
InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
ProcCmdline: /usr/bin/sddm-greeter --socket /tmp/sddm-:0-yjfESG --theme /usr/share/sddm/themes/breeze
SegvAnalysis: Failure: Unknown offset literal: [rax+0x18]
Signal: 11
SourcePackage: sddm
StacktraceTop:
 ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
 ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
 ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
 ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
 ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
Title: sddm-greeter crashed with SIGSEGV
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 root (this=0x0) at qxcbscreen.h:81
 QXcbWMSupport::updateNetWMAtoms (this=this@entry=0x1c96fe0) at qxcbwmsupport.cpp:59
 QXcbWMSupport::QXcbWMSupport (this=0x1c96fe0, c=<optimized out>) at qxcbwmsupport.cpp:44
 QXcbConnection::QXcbConnection (this=0x1c88b60, nativeInterface=0x1c7eb70, canGrabServer=<optimized out>, displayName=0x0) at qxcbconnection.cpp:395
 QXcbIntegration::QXcbIntegration (this=0x1c7e6f0, parameters=..., argc=@0x7fff84c3980c: 5, argv=0x7fff84c399b8) at qxcbintegration.cpp:174

[Philip Muškovac (yofel)]

So, purging and reinstalling the nvidia driver fixed it. Lib mismatch somewhere I guess...

[Philip Muškovac (yofel)]

Ok, reliably happens with nvidia-352 when using the nvidia profile

[Philip Muškovac (yofel)]

Ok, now I even had that crash with nvidia using the intel profile, fix was to uninstall the nvidia driver. Weird..

[Matteo Croce (teknoraver)]

Same issue with Xenial and Intel card

[ 235.068210] traps: sddm-greeter[1850] trap invalid opcode ip:7f109c1e60d1 sp:7ffe1efab360 error:0
[ 323.434385] traps: sddm-greeter[1955] trap invalid opcode ip:7fc20db120d1 sp:7ffc4012ede0 error:0
[ 330.395388] traps: sddm[1835] trap invalid opcode ip:7fb72d7846a0 sp:7ffdc131acd8 error:0 in libQt5Core.so.5.5.1[7fb72d42b000+4c5000]
[ 336.848849] sddm[2037]: segfault at fffffffffe306be6 ip fffffffffe306be6 sp 00007ffefb1a17d8 error 15
[ 343.379775] sddm[2092]: segfault at 0 ip 00007f287838d693 sp 00007ffca0e0e100 error 4 in libQt5Core.so.5.5.1[7f28780d2000+4c5000]
[ 347.903214] traps: sddm-greeter[2177] trap invalid opcode ip:7fcc9c0400d1 sp:7fff24d467e0 error:0
[ 359.387730] traps: sddm-greeter[2245] trap invalid opcode ip:7f4840b9d0d1 sp:7ffd5437cb40 error:0
[ 365.088913] traps: sddm-greeter[2309] trap invalid opcode ip:7f24b4ea50d1 sp:7ffe12d8f500 error:0
[ 372.355790] traps: sddm-greeter[2374] trap invalid opcode ip:7f381755f0d1 sp:7ffdbb839dc0 error:0

$ lspci -nn |grep VGA
00:02.0 VGA compatible controller [0300]: Intel Corporation Sky Lake Integrated Graphics [8086:1912] (rev 06)