Sounds like the real issue is that the login screen is not appearing.
Please run these commands and attach the output files from each:
1. lspci -k > lspcik.txt
2. dpkg -l > dpkgl.txt
3. dmesg > dmesg.txt
4. journalctl -b > journal.txt
** Also affects: mutter (Ubuntu)
Importance: Undecided
Status: New
** Changed in: mutter (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1798790
Title:
Ubuntu 18.10 hangs at "started bpfilter" - "Started Gnome Desktop
Manager" during boot
Status in gdm3 package in Ubuntu:
Incomplete
Status in mutter package in Ubuntu:
Incomplete
Bug description:
"Started bpfilter" is located just under "Started Gnome Desktop
Manager". There is unusual Network activity during that time. The
light of the WiFi adapter is blinking a lot.
I am not sure the problem is with the gdm3 package. As a matter of
fact, I would remove it and let someone more experienced to set it.
I'm afraid I might break something, though.
The specific steps or actions you took that caused you to encounter the
problem: 1. Boot Ubuntu 18.10 with the Nvidia proprietary drivers
installed.
The behavior you expected: I expected Ubuntu 18.10 to boot normally.
The behavior you actually encountered: The computer gets stuck in a
command-like environment with the last message being "started
bpfilter". You can't type any commands.
I have found that uninstalling the Nvidia proprietary drivers by going
into recovery mode fixes the issue.
Booting with the earlier kernel doesn't fix the issue. Installing the
earlier v.340 driver also doesn't fix the issue.
This (https://askubuntu.com/questions/1032639/ubuntu-18-04-stuck-in-
boot-after-starting-gnome-display-manager-on-intel-graphic) seems
relevant. This is where I found the "solution".
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1798790/+subscriptions
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