/usr/lib/ubuntu-release-upgrader/check-new-release-gtk:TypeError:on_button_upgrade_now_clicked:run:error:error:__init__:__init__:function

This is because of the DistUpgradeFetcher.py expects gksu, but ubuntu-release-upgrader-core does not depend on it and gksu is not installed by default.

When I experienced this there were two tracebacks and the first one ended in 'FileNotFoundError: [Errno 2] No such file or directory'.

Hello errors.ubuntu.com, or anyone else affected,

Accepted ubuntu-release-upgrader into quantal-proposed. The package will build now and be available at http://launchpad.net/ubuntu/+source/ubuntu-release-upgrader/1:0.190.8 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

Hello errors.ubuntu.com, or anyone else affected,

Accepted ubuntu-release-upgrader into raring-proposed. The package will build now and be available at http://launchpad.net/ubuntu/+source/ubuntu-release-upgrader/1:0.192.13 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

Upon installing ubuntu-release-upgrader from raring-proposed libgksu2-0 was also installed, so marking as v-done-r.

Upon installing ubuntu-release-upgrader from quanal-proposed gksu was also installed, so marking as v-done-r.

This bug was fixed in the package ubuntu-release-upgrader - 1:0.190.8

---------------
ubuntu-release-upgrader (1:0.190.8) quantal-proposed; urgency=low

  * u-r-u-gtk: Depend on gksu so that distribution upgrades will work
    (LP: #1210649)
  * u-r-u-gtk: Depend on gir1.2-webkit-3.0 (LP: #1215526)
  * DistUpgradeFetcher.py: Properly pass Gtk.window to error
    (LP: #1199984)
 -- Brian Murray <email address hidden> Thu, 22 Aug 2013 13:38:36 -0700

The verification of this Stable Release Update has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regresssions.

This bug was fixed in the package ubuntu-release-upgrader - 1:0.192.13

---------------
ubuntu-release-upgrader (1:0.192.13) raring-proposed; urgency=low

  * u-r-u-gtk: Depend on gksu so that distribution upgrades will work
    (LP: #1210649)
  * u-r-u-gtk: Depend on gir1.2-webkit-3.0 (LP: #1215526)
  * DistUpgradeFetcher.py: Properly pass Gtk.window to error
    (LP: #1199984)
 -- Brian Murray <email address hidden> Tue, 20 Aug 2013 15:32:42 -0700

This bug was fixed in the package ubuntu-release-upgrader - 1:0.205

---------------
ubuntu-release-upgrader (1:0.205) saucy; urgency=low

  * Instead of using gksu to authenticate for the distribution upgrade, use
    do-release-upgrade with pkexec (LP: #1210649)
 -- Brian Murray <email address hidden> Fri, 04 Oct 2013 19:17:49 -0700