Public bug reported:
Upgrade prerequisites failed.
/var/log/dist-upgrade/main.log contents:
2007-10-18 10:34:13,308 INFO release-upgrader version '0.81' started
2007-10-18 10:34:13,594 DEBUG lsb-release: 'feisty'
2007-10-18 10:34:13,595 DEBUG _pythonSymlinkCheck run
2007-10-18 10:34:14,295 DEBUG checkViewDepends()
2007-10-18 10:34:14,295 DEBUG getRequiredBackports()
2007-10-18 10:34:14,297 ERROR IOError in cache.update(): 'Failed to lock
/var/lib/apt/lists/lock'. Retrying (currentRetry: 0)
2007-10-18 10:34:14,297 ERROR IOError in cache.update(): 'Failed to lock
/var/lib/apt/lists/lock'. Retrying (currentRetry: 1)
2007-10-18 10:34:14,297 ERROR IOError in cache.update(): 'Failed to lock
/var/lib/apt/lists/lock'. Retrying (currentRetry: 2)
2007-10-18 10:34:14,297 ERROR doUpdate() failed complettely
2007-10-18 10:34:15,093 ERROR Can not find backport 'release-upgrader-apt'
** Affects: ubuntu
Importance: Undecided
Status: New
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Update-manager failed to update Ubuntu 7.4 to Ubuntu 7.10
https://bugs.launchpad.net/bugs/154004
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