[Bug 1845466] [NEW] Dell XPS 13 7390 - "Failed to start MokManager" error when trying to install 3rd party driving during install, leading to unbootable device

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Image: http://cdimage.ubuntu.com/daily-live/20190926/eoan-desktop-amd64.iso
Device: Dell XPS 13 7390 (201908-27305)

Note:
- TPM2 is disabled (because of lp:1845454)
- Secure Boot is enabled

Install Ubuntu 19.10.
Check the box "Install third party drivers". You'll have to input a password used by Secure Boot at the next reboot.
Complete the installation and restart the device.

Expected result:
The device reboots in the MOK Management screen where you can enroll the new MOK. Then the boot process continues and you can log in Ubuntu.

Actual result:
The following error is shown for a few seconds, then the device turns off:

Failed to open \EFI\ubuntu\mmx64.efi - Not Found
Failed to load image \EFI\ubuntu\mmx64.efi: Not Found
Failed to start MokManager: Not Found
Something has gone seriously wrong: import_mok_state() failed: Not Found

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


** Tags: amd64 ce-qa-concern iso-testing rls-ee-incoming
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Dell XPS 13 7390 - "Failed to start MokManager" error when trying to install 3rd party driving during install, leading to unbootable device
https://bugs.launchpad.net/bugs/1845466
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