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[Tim Andersson <2060213@xxxxxxxxxxxxxxxxxx>]

MP attached to bug.

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https://bugs.launchpad.net/bugs/2060213

Title:
  "apt failed to download packages, retrying in 10s..." results in "
  Unable to acquire the dpkg frontend lock"

Status in Auto Package Testing:
  In Progress

Bug description:
  logfile:
  https://objectstorage.prodstack5.canonical.com/swift/v1/AUTH_0f9aae918d5b4744bf7b827671c86842/autopkgtest-noble/noble/armhf/b/balsa/20240404_081820_ad372@/log.gz

  pertinent log messages:
  ```
  883s Get:204 http://ftpmaster.internal/ubuntu noble-proposed/universe armhf xvfb armhf 2:21.1.11-2ubuntu2 [738 kB]
  935s autopkgtest: WARNING: apt failed to download packages, retrying in 10s...
  954s E: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 763 (apt-get)
  954s E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it?
  955s autopkgtest: WARNING: Test dependencies are unsatisfiable - calling apt install on test deps directly for further data about failing dependencies in test logs
  957s Reading package lists...
  958s Building dependency tree...
  ```

  It perhaps looks like in a setup script, whilst sleeping before a
  retry, another process starts an apt-get command which causes the
  script to fail after the sleep. Or something along those lines.

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