Version: (using KDE 4.2.2) OS: Linux Installed from: Ubuntu Packages The update notifier told me there were some updates available. I clicked on "apply all available updates". Update began, then crashed midway (frozen screen, I couldn't do anything but reboot the computer). Of course, I couldn't get any error message. Now I try to apply the updates again, but it tells me that: "Cannot get the exclusive lock on the packaging backend. Please close any other legacy packaging tools that may be open." There's none! I've just rebooted!
Well, there are lot's of reasons why that happen, the one i believe that happened is that your dbus might got updated, and if you update dbus we lost connection with packagekit, and since PackageKit -> apt backend uses dbus, the apt backend stops. That's why Ubuntu should stop tagging experimental stuff as stable, and the reason i use debin and am creating a backend done in cpp so we don't lose connection. If i were you i'd try doing as root aptitude safe-upgrade. If the lock problem still happens there try removing the lock file.
It worked (sudo aptitude safe-upgrade), thank you! I agree with you, Kubuntu shouldn't tag experimental stuff like this as stable. There are too many problems, it annoys me more and more. May I ask you which Debian you use, stable or testing, and if you think Debian testing is more stable than Kubuntu?
Glad it worked :D I use a mixture of testing/unstable/experimental, all tunned with apt pinning to always try to be testing. Imo Debian testing is even more stable that kubuntu since it is still using kde 3.5 :P, that's why i have also unstable to get kde4 which imo is still a bit unstable :D I close this bug as invalid since it's apt backend fault.