I'm having the exact same problem, in my case KnetworkManager locks up only when after bootup DCopserver tries to access the KDE Wallet, I blanked the password in the wallet but it still happens every once in a while. Killing the knetworkmanager process and restarting is what I do, not too bad but indeed deeply annoying.
Besides is there any reason for DCopserver to access the wallet every once in a while on boot-up? -- knetworkmanager freezes if kwallet doesn't open immediately https://launchpad.net/bugs/69118 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
