Tails Installer sometimes hangs late in the installation process
Originally created by Tails on #6092 (Redmine)
"Installing Tails to a pristine USB drive" often stalls with "Unmounting /dev/sda1" at 98%.
Still happens with 0.18~rc1, despite it has the commit fb3d08a5 from upstream liveusb-creator that we hoped would help.
Feature Branch: bugfix/6092-drop-racy-code
Parent Task: #8539 (closed)
- Related to #6026 (closed)