This is still a problem in Ubuntu 18.04 :(
I want ubiquity to wait until it can get a lock on the debconf
databases... and perhaps timeout after a few minutes.
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This bug has been encountered when running Ubiquity with the automatic-
ubiquity kernel option in 16.04. The output of systemctl status
ubiquity.service has the following:
systemd[1]: Starting Ubuntu live CD installer...
start-ubiquity-dm[]: debconf: DbDriver "templatedb":
** Changed in: ubiquity (Baltix)
Status: New = Invalid
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https://bugs.launchpad.net/bugs/128693
Title:
Ubiquity installer fails to start silently if debconf's config.dat is
Fixing this would sort out a number of other latent problems, so
importance Medium.
** Changed in: ubiquity (Ubuntu)
Importance: Undecided = Medium
Status: New = Confirmed
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Ubiquity installer fails to start silently if debconf's config.dat is locked by
another program
