My observations so far:
* Even with a hacked-up update-manager that always enters partial upgrade
mode, I can't currently reproduce this bug, either directly or via
update-notifier.
* I think partial upgrade mode is a red herring anyway. Of this bug and its
16 duplicates, only two show "--dist-upgrade" in PythonArgs. Two have
"--no-focus-on-map" (indicating a launch by update-notifier). Two have no
arguments at all, and the others have "-d", suggesting launch from a
menu/dash/launcher/terminal/whatever.
* Only one of these bugs is from the final oneiric version of update-manager
or newer, and there appears to be no bug pattern that might have prevented
further reports.
* All but three of these bugs are from systems recently upgraded from natty to
oneiric, and two of the remainder from oneiric beta to oneiric.
* Of the eight bugs with full update-manager logs attached, all eight have
unity and unity-2d installed (though I can't really tell what desktop
environment they're actually running), and seven have ubuntu-desktop installed.
One has kde-window-manager installed, although not kubuntu-desktop. One has
edubuntu-desktop installed.
* I'm trying a natty install to see if I can reproduce this on upgrade from
that.
My feeling so far is that this was probably a bug in some bit of desktop
infrastructure which has since been fixed, and I expect to remove the
rls-p-tracking tag if further reproduction attempts fail, due to the
paucity of recent reports.
** Changed in: update-manager (Ubuntu Precise)
Assignee: Barry Warsaw (barry) => Colin Watson (cjwatson)
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https://bugs.launchpad.net/bugs/848915
Title:
Partial upgrade results in cryptic traceback because $DISPLAY is not
set
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