2020-07-14 16:57:47,948 INFO Using config files '['./DistUpgrade.cfg.bionic']'
2020-07-14 16:57:47,948 INFO uname information: 'Linux amr-LIFEBOOK-S761 5.3.0-62-generic #56~18.04.1-Ubuntu SMP Wed Jun 24 16:17:03 UTC 2020 x86_64'
2020-07-14 16:57:48,518 INFO apt version: '1.6.12ubuntu0.1'
2020-07-14 16:57:48,518 INFO python version: '3.6.9 (default, Apr 18 2020, 01:56:04) 
[GCC 8.4.0]'
2020-07-14 16:57:48,522 INFO release-upgrader version '20.04.19' started
2020-07-14 16:57:48,535 INFO locale: 'en_US' 'UTF-8'
2020-07-14 16:57:48,598 INFO screen could not be run
2020-07-14 16:57:48,640 DEBUG Using 'DistUpgradeViewText' view
2020-07-14 16:57:48,699 DEBUG enable dpkg --force-overwrite
2020-07-14 16:57:48,753 DEBUG creating statefile: '/var/log/dist-upgrade/apt-clone_system_state.tar.gz'
2020-07-14 16:57:54,366 DEBUG lsb-release: 'bionic'
2020-07-14 16:57:54,367 DEBUG _pythonSymlinkCheck run
2020-07-14 16:57:54,370 DEBUG openCache()
2020-07-14 16:57:54,370 DEBUG quirks: running PreCacheOpen
2020-07-14 16:57:54,371 DEBUG running Quirks.PreCacheOpen
2020-07-14 16:57:55,216 DEBUG /openCache(), new cache size 98355
2020-07-14 16:57:55,216 DEBUG need_server_mode(): run in 'desktop' mode, (because of pkg 'ubuntu-desktop')
2020-07-14 16:57:55,217 DEBUG checkViewDepends()
2020-07-14 16:57:55,224 DEBUG running doUpdate() (showErrors=False)
2020-07-14 16:58:17,308 DEBUG openCache()
2020-07-14 16:58:18,153 DEBUG /openCache(), new cache size 98355
2020-07-14 16:58:18,153 DEBUG doPostInitialUpdate
2020-07-14 16:58:18,153 DEBUG quirks: running focalPostInitialUpdate
2020-07-14 16:58:18,153 DEBUG running Quirks.focalPostInitialUpdate
2020-07-14 16:58:27,611 DEBUG Snap core18 is installed
2020-07-14 16:58:27,964 DEBUG Snap gnome-3-34-1804 is installed
2020-07-14 16:58:27,965 DEBUG Snap gnome-3-34-1804 is not tracking the release channel
2020-07-14 16:58:28,419 DEBUG Snap gtk-common-themes is installed
2020-07-14 16:58:29,227 DEBUG Snap gnome-3-28-1804 is installed
2020-07-14 16:58:29,254 DEBUG Snap gnome-3-28-1804 is being used by opera. Switching it to stable track
2020-07-14 16:58:29,663 DEBUG Snap gnome-calculator is installed
2020-07-14 16:58:30,163 DEBUG Snap gnome-characters is installed
2020-07-14 16:58:30,543 DEBUG Snap gnome-logs is installed
2020-07-14 16:58:41,227 DEBUG MetaPkgs: ubuntu-desktop
2020-07-14 16:58:46,537 DEBUG Foreign: 
2020-07-14 16:58:46,538 DEBUG Obsolete: cloudberry-backup dus geogebra-classic guidus mkusb mkusb-common mkusb-nox mkusb-plug realvnc-vnc-viewer usb-pack-efi zoom
2020-07-14 16:58:46,538 DEBUG updateSourcesList()
2020-07-14 16:58:46,555 DEBUG rewriteSourcesList() with mirror_check
2020-07-14 16:58:46,555 DEBUG ['ubuntu-minimal', 'ubuntu-standard']
2020-07-14 16:58:46,555 DEBUG Checking pkg: ubuntu-minimal
2020-07-14 16:58:46,557 DEBUG Checking pkg: ubuntu-standard
2020-07-14 16:58:46,560 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu bionic main restricted'
2020-07-14 16:58:46,560 DEBUG verifySourcesListEntry: deb http://archive.ubuntu.com/ubuntu focal main restricted
2020-07-14 16:58:46,560 DEBUG url_downloadable: http://archive.ubuntu.com/ubuntu/dists/focal/Release
2020-07-14 16:58:46,560 DEBUG s='http' n='archive.ubuntu.com' p='/ubuntu/dists/focal/Release' q='' f=''
2020-07-14 16:58:47,325 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu focal main restricted' updated to new dist
2020-07-14 16:58:47,325 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu bionic-updates main restricted'
2020-07-14 16:58:47,326 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu focal-updates main restricted' updated to new dist
2020-07-14 16:58:47,326 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu bionic universe'
2020-07-14 16:58:47,327 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu focal universe' updated to new dist
2020-07-14 16:58:47,327 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu bionic-updates universe'
2020-07-14 16:58:47,328 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu focal-updates universe' updated to new dist
2020-07-14 16:58:47,328 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu bionic multiverse'
2020-07-14 16:58:47,329 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu focal multiverse' updated to new dist
2020-07-14 16:58:47,330 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu bionic-updates multiverse'
2020-07-14 16:58:47,330 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu focal-updates multiverse' updated to new dist
2020-07-14 16:58:47,331 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu bionic-backports main restricted universe multiverse'
2020-07-14 16:58:47,331 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu focal-backports main restricted universe multiverse' updated to new dist
2020-07-14 16:58:47,332 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu bionic-security main restricted'
2020-07-14 16:58:47,332 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu focal-security main restricted' updated to new dist
2020-07-14 16:58:47,332 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu bionic-security universe'
2020-07-14 16:58:47,333 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu focal-security universe' updated to new dist
2020-07-14 16:58:47,333 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu bionic-security multiverse'
2020-07-14 16:58:47,333 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu focal-security multiverse' updated to new dist
2020-07-14 16:58:47,415 DEBUG running doUpdate() (showErrors=True)
2020-07-14 16:59:15,473 DEBUG openCache()
2020-07-14 16:59:16,126 DEBUG /openCache(), new cache size 65806
2020-07-14 16:59:16,126 DEBUG need_server_mode(): run in 'desktop' mode, (because of pkg 'ubuntu-desktop')
2020-07-14 16:59:16,627 ERROR Dist-upgrade failed: 'E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.'
2020-07-14 16:59:16,636 DEBUG abort called
2020-07-14 16:59:16,637 DEBUG openCache()
2020-07-14 16:59:20,062 DEBUG /openCache(), new cache size 98355