I had this problem in an up-to-date-Kubuntu-8.04 since an kde upgrade as the original poster reported. The 'sudo chmod 4755 /usr/bin/kcheckpass' did solve the problem for me, thx Dragomir.
This should be included in an upgrade script. The bug had nothing to do with scim (in my case). Unlocking now works also while skim or scim is running. ** Changed in: kdebase (Ubuntu) Sourcepackagename: scim => kdebase Status: Incomplete => Confirmed -- Cannot unlock the session if the session is locked by screensaver or locked from start menu, KDE 3.5.6 https://bugs.launchpad.net/bugs/92932 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs