Upgraded from Kubuntu 9.10 to 10.04 (32bits). The same problem here, after logging out, the black screen appears and the keyboard doesn't respond. I was rebooting with Alt+PrintScreen+R+S+E+I+U+B.
I'm using the radeon driver (the free one). Here's some logged info about KDM. Look at the * ============================================== kdm :0[1084]: pam_sm_authenticate: Called kdm :0[1084]: pam_sm_authenticate: username = [leo] kdm :0[1273]: Passphrase file wrapped kdm_greet[1010] Cannot load /usr/share/kde4/apps/kdm/faces/.default.face: No existe el fichero ó directorio kdm :0[1005]: pam_sm_authenticate: Called kdm :0[1005]: pam_sm_authenticate: username = [leo] kdm :0[1211]: Passphrase file wrapped * kdm :0[1165]: Hung in XOpenDisplay(:0), aborting * kdm :0[1165]: Cannot connect to :0, giving up * kdm[785] Display :0 cannot be opened kdm_greet[797] Cannot load /usr/share/kde4/apps/kdm/faces/.default.face: No existe el fichero ó directorio kdm :0[792]: pam_sm_authenticate: Called kdm :0[792]: pam_sm_authenticate: username = [leo] kdm :0[1001]: Passphrase file wrapped kdm_greet[790] Cannot load /usr/share/kde4/apps/kdm/faces/.default.face: No existe el fichero ó directorio kdm :0[787]: pam_sm_authenticate: Called kdm :0[787]: pam_sm_authenticate: username = [mcv] kdm_greet[2435] Cannot load /usr/share/kde4/apps/kdm/faces/.default.face: No existe el fichero ó directorio kdm :0[2432]: pam_sm_authenticate: Called kdm :0[2432]: pam_sm_authenticate: username = [leo] kdm :0[2464]: Passphrase file wrapped * kdm[573] X server for display :0 terminated unexpectedly * kdm[573] Unable to fire up local display :0; disabling. kdm_greet[799] Cannot load /usr/share/kde4/apps/kdm/faces/.default.face: No existe el fichero ó directorio kdm :0[795]: pam_sm_authenticate: Called kdm :0[795]: pam_sm_authenticate: username = [leo] kdm :0[1007]: Passphrase file wrapped kdm_greet[790] Cannot load /usr/share/kde4/apps/kdm/faces/.default.face: No existe el fichero ó directorio kdm :0[784]: pam_sm_authenticate: Called kdm :0[784]: pam_sm_authenticate: username = [leo] kdm :0[995]: Passphrase file wrapped ** Tags added: kdm ** Tags added: x-server -- Logout in Kubuntu 10.04 causes a crash https://bugs.launchpad.net/bugs/574344 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to nvidia-graphics-drivers in ubuntu. _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp