BOTH are identical until after "Started GNOME Display Manager." The failed version 115 has the following after this point: [ OK ] Started File System Check Daemon to report status. Mounting /boot/efi... [ OK ] Started Show Plymouth Boot Screen. [ OK ] Reached target Local Encrypted Volumes. [ OK ] Started Forward Password Requests to Plymouth Directory Watch. [ OK ] Mounted Mount unit for okteta, revision 11. [ OK ] Mounted Mount unit for gnome-3-28-1804, revision 128. [ OK ] Mounted Mount unit for gtk-common-themes, revision 1506. [ OK ] Mounted Mount unit for vlc, revision 1700. [ OK ] Mounted Mount unit for audacity, revision 675. [ OK ] Mounted Mount unit for audacity, revision 666. [ OK ] Mounted Mount unit for gnome-characters, revision 550. [ OK ] Mounted Mount unit for core18, revision 1885. [ OK ] Mounted Mount unit for gnome-characters, revision 539. [ OK ] Mounted Mount unit for inkscape, revision 7821. [ OK ] Mounted Mount unit for snap-store, revision 209. [ OK ] Mounted Mount unit for gtk2-common-themes, revision 13. [ OK ] Mounted Mount unit for youtube-dl, revision 2846. [ OK ] Mounted Mount unit for kde-frameworks-5-core18, revision 32. [ OK ] Mounted /boot/efi. [ OK ] Reached target Local File Systems. Starting Create Volatile Files and Directories... Starting AppArmor initialization... Starting Tell Plymouth To Write Out Runtime Data... Starting Set console font and keymap... Starting Clean up any mess left by 0dns-up... [ OK ] Mounted Mount unit for gimp, revision 292. [ OK ] Started Set console font and keymap. [ OK ] Started Clean up any mess left by 0dns-up. [ OK ] Started Create Volatile Files and Directories. Starting Network Time Synchronization... Starting Update UTMP about System Boot/Shutdown... Starting Network Name Resolution... [ OK ] Mounted Mount unit for gtk-common-themes, revision 1502. [ OK ] Mounted Mount unit for vlc, revision 1620. [ OK ] Started Tell Plymouth To Write Out Runtime Data. [ OK ] Started Update UTMP about System Boot/Shutdown. [ OK ] Mounted Mount unit for gnome-3-34-1804, revision 33. [ OK ] Started AppArmor initialization. Starting Raise network interfaces... Starting Load AppArmor profiles managed internally by snapd... [ OK ] Mounted Mount unit for gnome-3-28-1804, revision 116. [ OK ] Mounted Mount unit for gnome-3-26-1604, revision 100. [ OK ] Mounted Mount unit for core, revision 9665. [ OK ] Started Load AppArmor profiles managed internally by snapd. [ OK ] Started Raise network interfaces. [ OK ] Mounted Mount unit for core18, revision 1880. [ OK ] Mounted Mount unit for gimp, revision 281. [ OK ] Mounted Mount unit for gnome-system-monitor, revision 145. [ OK ] Mounted Mount unit for inkscape, revision 7921. [ OK ] Mounted Mount unit for gnome-system-monitor, revision 148. [ OK ] Mounted Mount unit for core, revision 9804. [ OK ] Started Network Time Synchronization. [ OK ] Reached target System Time Synchronized. [ OK ] Reached target System Initialization. [ OK ] Started ACPI Events Check. [ OK ] Listening on ACPID Listen Socket. [ OK ] Started Discard unused blocks once a week. [ OK ] Started Daily apt download activities. [ OK ] Started CUPS Scheduler. [ OK ] Started Daily Cleanup of Temporary Directories. [ OK ] Started Trigger anacron every hour. [ OK ] Listening on D-Bus System Message Bus Socket. [ OK ] Listening on UUID daemon activation socket. [ OK ] Started Message of the Day. [ OK ] Reached target Paths. [ OK ] Started Daily apt upgrade and clean activities. [ OK ] Listening on CUPS Scheduler. [ OK ] Reached target Timers. [ OK ] Listening on Avahi mDNS/DNS-SD Stack Activation Socket. Starting Socket activation for snappy daemon. [ OK ] Listening on Socket activation for snappy daemon. [ OK ] Reached target Sockets. [ OK ] Reached target Basic System. Starting LSB: Speech Dispatcher... [ OK ] Started irqbalance daemon. Starting Thermal Daemon Service... Starting System Logging Service... [ OK ] Reached target Login Prompts. Starting LSB: Record successful boot for GRUB... Starting Login Service... [ OK ] Started CUPS Scheduler. [ OK ] Reached target Printer. Starting Modem Manager... Starting Avahi mDNS/DNS-SD Stack... [ OK ] Started ACPI event daemon. Starting Dispatcher daemon for systemd-networkd... Starting Disk Manager... [ OK ] Started Regular background program processing daemon. [ OK ] Started Run anacron jobs. Starting Accounts Service... [ OK ] Started D-Bus System Message Bus. Starting Network Manager... [ OK ] Started Set the CPU Frequency Scaling governor. Starting LSB: automatic crash report generation... Starting WPA supplicant... Starting Detect the available GPUs and deal with any system changes... Starting Restore /etc/resolv.conf if the system crashed before the ppp link was shut down... Starting Save/Restore Sound Card State... [ OK ] Started System Logging Service. [ OK ] Mounted Mount unit for gnome-3-34-1804, revision 36. [ OK ] Mounted Mount unit for gnome-logs, revision 93. [ OK ] Started Thermal Daemon Service. [ OK ] Started Restore /etc/resolv.conf if the system crashed before the ppp link was shut down. [ OK ] Started Save/Restore Sound Card State. [ OK ] Started Avahi mDNS/DNS-SD Stack. [ OK ] Started LSB: Speech Dispatcher. [ OK ] Started Network Name Resolution. [ OK ] Started WPA supplicant. Starting Authorization Manager... [ OK ] Reached target Host and Network Name Lookups. [ OK ] Started Make remote CUPS printers available locally. [ OK ] Started LSB: automatic crash report generation. [ OK ] Started LSB: Record successful boot for GRUB. Starting Manage, Install and Generate Color Profiles... [ OK ] Started Authorization Manager. [ OK ] Started Accounts Service. [ OK ] Mounted Mount unit for youtube-dl, revision 2840. [ OK ] Started Modem Manager. [ OK ] Started Manage, Install and Generate Color Profiles. Starting Hostname Service... [ OK ] Started Detect the available GPUs and deal with any system changes. [ OK ] Started Uncomplicated firewall. [ OK ] Mounted Mount unit for gtk2-common-themes, revision 9. [ OK ] Started Dispatcher daemon for systemd-networkd. [ OK ] Mounted Mount unit for snap-store, revision 415. [ OK ] Mounted Mount unit for gnome-3-26-1604, revision 98. Starting Snap Daemon... [ OK ] Started Hostname Service. [ OK ] Started Network Manager. [ OK ] Reached target Network. Starting Permit User Sessions... Starting OpenVPN service... Starting Network Manager Wait Online... [ OK ] Started OpenVPN service. [ OK ] Started Permit User Sessions. Starting Hold until boot process finishes up... Starting GNOME Display Manager... Starting Network Manager Script Dispatcher Service... [ OK ] Started Network Manager Script Dispatcher Service. [ OK ] Started GNOME Display Manager.