[Bug 1904451] [NEW] 20.10 grub update at end of install gave an error

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I do not remember the error text but it had 'python' in it.

I can boot to three different OSs on different drives: Xubuntu 20.04,
Windows 10, and Ubuntu Studio. The boot drive is Xubuntu. The Ubuntu
Studio install screens identified the Xubuntu drive as containing the
grub location to be updated but gave an error during that update, the
last install step, after which on rebooting the computer I could only
get to the grub prompt, no grub menu. I could get to the Windows OS by
selecting that drive in the motherboard boot sequence.

It took a few hours to figure out how to fix grub to have the expected
menu and boot into all three OSs. This is the web-page I used.

https://maunium.net/blog/linux-grub-fix/

I can boot into Ubuntu Studio now but it shows a long list of activities
being performed before getting to where I enter my password. I expect
that this list is normal and just not being hidden. A shorter list is
also displayed on shutdown.

I attempted to run jack control but it would not run. The app would open
but is giving an error when started. I will copy back my saved user
directory and see what happens.

** Affects: grub (Ubuntu)
     Importance: Undecided
         Status: Incomplete

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20.10 grub update at end of install gave an error
https://bugs.launchpad.net/bugs/1904451
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