Solved: Ubuntu 20.04 update makes boot time increase by 4 minutes

I’m doing software development on an Ubuntu 20.04 VM running on my MacBook Pro via Parallels Desktop 17. I recently noticed that the “Software Update” app in the Ubuntu desktop machine was saying there were a lot of things to update, which makes sense since I just created this VM a couple of months ago via a fancy Ansible playbook, and I haven’t gotten around to updating it until yesterday.

Well, after the update, it started taking a really long time to boot. There were two places where it hangs for 2 minutes for no apparent reason, meaning that the boot process is about 4-1/2 minutes long.

I’ve figured out what happened and found a workaround, but I’ll mention a few of the things I looked at along the way since they’re sort of interesting and may be relevant if your issue is similar but not caused by the same thing.

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Take back your control-space keybinding in Ubuntu w/ Cinnamon

I use Emacs and just switched to Cinnamon when upgrading to Trusty Tahr. It somehow stole the control-space keybinding, which I use in Emacs a lot; it is used for setting the current mark, so I can cut or delete a region of a buffer. This is also used for the autocomplete feature in Eclipse, which is one of the main reasons I use Eclipse.

Solution found: some built-in thing called IBus binds that for setting the input method. I like the input method I already have set up & I don’t need to change it, so here’s how to disable that: answer on askubuntu.com.