Public bug reported:
I was upgrading my Ubuntu GNOME 15.10 system to 16.04 with update-
manager.
Note: I've the org.gtk.Settings.Debug enable-inspector-keybinding
gsetting set to true to enable the GTK+ Inspector.
I hit Ctrl+Shift+I (the key to open the GTK+ inspector) while the
upgrade window was focused, in the middle of upgrading packages. A few
minutes later the upgrade process stopped making progress (CPU idle, no
disk I/O). The window is not reacting to mouse clicks or key events.
pstree shows
xenial,16938,root /tmp/ubuntu-release-upgrader-_yjo7xr4/xenial --mode=server
--frontend=DistUpgradeViewGtk3
`-(dpkg,6263)
and strace -p 16938 shows
write(14, "pmstatus:libde265-0:16.8172:Installing libde265-0
(amd64)\n", 58
and lsof -p 16938 shows
xenial 16938 root 13r FIFO 0,10
0t0 5172320 pipe
xenial 16938 root 14w FIFO 0,10
0t0 5172320 pipe
while the last few terminal messages shown in the upgrade window were
Unpacking gir1.2-atspi-2.0 (2.18.3-4ubuntu1) over (2.16.0-1ubuntu1) ...
Processing triggers for ureadahead (0.100.0-19) ...
Processing triggers for man-db (2.7.4-1) ...
/var/log/dist-upgrade/apt-term.log ends has those lines, and more (507
lines or 53773 bytes more), ending in
Preparing to unpack .../libde265-0_1.0.2-2_amd64.deb ...
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-release-upgrader-core 1:15.10.14.4
ProcVersionSignature: Ubuntu 4.2.0-35.40-generic 4.2.8-ckt5
Uname: Linux 4.2.0-35-generic x86_64
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: GNOME
Date: Fri Apr 22 14:44:18 2016
EcryptfsInUse: Yes
InstallationDate: Installed on 2012-07-25 (1366 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64
(20120425)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
Symptom: ubuntu-release-upgrader
UpgradeStatus: Upgraded to xenial on 2016-04-22 (0 days ago)
VarLogDistupgradeAptclonesystemstate.tar.gz: Error: command ['pkexec', 'cat',
'/var/log/dist-upgrade/apt-clone_system_state.tar.gz'] failed with exit code
127: pkexec must be setuid root
VarLogDistupgradeTermlog:
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade xenial
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https://bugs.launchpad.net/bugs/1573558
Title:
Upgrade window freezes when I press Ctrl+Shift+I
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