Got the same error during upgrade from 18.10 to 19.04: 2019-04-25 02:20:35,241 DEBUG plugins for condition 'StartUpgrade' are '[]' 2019-04-25 02:20:35,241 DEBUG plugins for condition 'discoStartUpgrade' are '[]' 2019-04-25 02:20:35,241 DEBUG plugins for condition 'from_cosmicStartUpgrade' are '[]' 2019-04-25 02:20:35,241 DEBUG quirks: running StartUpgrade 2019-04-25 02:20:35,241 DEBUG running Quirks.StartUpgrade 2019-04-25 02:20:35,241 DEBUG skipping 'README' (no '.') 2019-04-25 02:20:35,241 DEBUG killing update-notifier 2019-04-25 02:20:35,250 DEBUG killing kblueplugd kbluetooth4 2019-04-25 02:20:35,260 DEBUG killing gnome-screensaver 2019-04-25 02:20:35,269 DEBUG setup poke timer for the screensaver 2019-04-25 02:20:35,274 DEBUG apt btrfs snapshots supported: False 2019-04-25 02:20:35,275 INFO cache.commit() 2019-04-25 02:36:30,588 WARNING no activity on terminal for 300 seconds (Installed libnss3 (amd64)) 2019-04-25 04:04:25,303 ERROR got an error from dpkg for pkg: 'install-info': 'triggers looping, abandoned' 2019-04-25 04:04:25,304 DEBUG running apport_pkgfailure() install-info: triggers looping, abandoned 2019-04-25 04:04:25,314 ERROR got an error from dpkg for pkg: 'install-info': 'triggers looping, abandoned' 2019-04-25 04:05:48,575 ERROR Exception during pm.DoInstall() Traceback (most recent call last): File "/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeView.py", line 220, in run res = pm.do_install(self.writefd) apt_pkg.Error: E:Sub-process /usr/bin/dpkg returned an error code (1) 2019-04-25 08:20:20,880 WARNING no activity on terminal for 300 seconds (Configuring language-pack-gnome-en-base (amd64)) 2019-04-25 08:20:20,891 ERROR SystemError from cache.commit(): installArchives() failed 2019-04-25 08:20:20,892 ERROR found exception: 'E:Sub-process /usr/bin/dpkg returned an error code (1)' 2019-04-25 08:20:32,134 DEBUG Running PostInstallScript: './xorg_fix_proprietary.py' 2019-04-25 08:20:32,139 ERROR got error from PostInstallScript ./xorg_fix_proprietary.py (g-exec-error-quark: Failed to execute child process “./xorg_fix_proprietary.py” (No such file or directory) (8))
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