Rajesh, the Google 2-Factor Authentication bug is bug 1175122. It should be fixed for GNOME Shell users with Ubuntu 13.04 and the GNOME3 PPA. Install the latest updates, reboot, then remove your Google account and re-add it.
Rajesh, the Google 2-Factor Authentication bug is bug 1175122. It should be fixed for GNOME Shell users with Ubuntu 13.04 and the GNOME3 PPA. Install the latest updates, reboot, then remove your Google account and re-add it.