Public bug reported:

     The search for the iso file doesn't wait long enough for the device
to show up.

     In /scripts/lupin-helpers (by way of /scripts/casper-premount
/20iso-scan), there is a loop that repeatedly checks a flock of devices,
trying to find the specified "iso-scan/filename"-specified iso-file.
The loop tries 3 times, waiting 3 seconds before the 2nd and 3rd tries.
It takes about 10 seconds for my external USB drive to show up.

     The kernel boot parameter "rootdelay" doesn't seem to be used in a
"boot=casper" context.  At any rate, it isn't applied before the iso-
scan.

     Observed in 14.04.1, and in 15.10.

** Affects: lupin (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: iso-scan lupin-casper

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https://bugs.launchpad.net/bugs/1535038

Title:
  iso-scan doesn't wait long enough

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