Public bug reported:
System was running fine then the desktop background went black. I continued to
work for a while to tidy things up (open window were OK) and rebooted.
Any attempt to login will produce a black screen shortly after the desktop is
displayed.
The problem is related to this:
[ 119.186969] plasmashell[2316]: segfault at 0 ip 00007f1517ee4556 sp
00007ffee1d19c30 error 4 in libkcupslib.so[7f1517ea8000+55000]
This started shortly after midnight. The first one in kern.log is:
May 9 00:08:46 parent kernel: [22487.658162] plasmashell[10497]:
segfault at 0 ip 00007faf64cce556 sp 00007ffe0cbc0b60 error 4 in
libkcupslib.so[7faf64c92000+55000]
so I suspect this is something to do with anacron scripts.
May 9 00:08:39 parent anacron[10182]: Job `cron.daily' started
The only packages updated since yesterday are:
root@parent:/local/configs/packages# diff installed.list.2018-0508
installed.list
448c448
< ii intel-microcode
3.20180312.0~ubuntu18.04.1 amd64 Processor microcode
firmware for Intel CPUs
---
> ii intel-microcode
> 3.20180425.1~ubuntu0.18.04.1 amd64 Processor microcode
> firmware for Intel CPUs
1112c1112
< ii libjavascriptcoregtk-4.0-18:amd64 2.20.1-1
amd64 JavaScript engine library from WebKitGTK+
---
> ii libjavascriptcoregtk-4.0-18:amd64 2.20.2-0ubuntu0.18.04.1
> amd64 JavaScript engine library from WebKitGTK+
1827c1827
< ii libraw16:amd64 0.18.8-1
amd64 raw image decoder library
---
> ii libraw16:amd64 0.18.8-1ubuntu0.1
> amd64 raw image decoder library
2073c2073
< ii libwebkit2gtk-4.0-37:amd64 2.20.1-1
amd64 Web content engine library for GTK+
---
> ii libwebkit2gtk-4.0-37:amd64 2.20.2-0ubuntu0.18.04.1
> amd64 Web content engine library for GTK+
2717c2717
< ii update-notifier-common 3.192
all Files shared between update-notifier and other
packages
---
> ii update-notifier-common 3.192.1
> all Files shared between update-notifier and
> other packages
but I don't see it being any of them. The microcode update didn't
actually change the firmware file for this system, and a reboot to the
previous kernel had the same problem anyway.
NOTE: that any attached system data is for the wrong system (correct Ubuntu
release though).
Since I have no desktop login on the affected system I can't run apport-bug
there.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: plasma-workspace 4:5.12.4-0ubuntu3
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CurrentDesktop: KDE
Date: Wed May 9 01:36:24 2018
InstallationDate: Installed on 2017-11-01 (188 days ago)
InstallationMedia: Kubuntu 17.10 "Artful Aardvark" - Release amd64 (20171017.1)
SourcePackage: plasma-workspace
UpgradeStatus: Upgraded to bionic on 2018-05-02 (7 days ago)
** Affects: plasma-workspace (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic
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https://bugs.launchpad.net/bugs/1770044
Title:
plasmashell crashes on login - so I can't use my desktop system.
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