If I remove ~/.kde4 (to get "clean" environment) and attempt to login
into KDE4, I never get as far as splash screen. It appears to have done
something (judging by JDD activity), and ~/.kde4 gets created; on the second
attempt I get to the desktop (after mentioned plasma crash).

I am not sure in which state ~/.kde4 actually is after I kill X server in this
case.

When it hangs, list of processes is

UID     PID PPID C STIME TTY       TIME CMD
bor     3959   1 0 May08 ?     00:00:00 ssh-agent
bor     3985   1 0 May08 ?     00:00:10 gpg-agent --daemon
bor    12583   1 0 19:23 ?     00:00:06 kded4
bor    12585   1 0 19:23 ?     00:00:02 /usr/lib/gam_server
bor    13906   1 0 May09 ?     00:00:08 /usr/bin/passkey-agent --default /bin/bluepin
bor    14552 14519 0 20:15 ?     00:00:00 /bin/sh /usr/bin/startkde
bor    14693   1 0 20:15 ?     00:00:00 /usr/bin/dbus-launch --exit-with-session --sh-syntax
bor    14694   1 0 20:15 ?     00:00:00 /usr/bin/dbus-daemon --fork --print-pid 6 --print-address 8 --session
bor    14698   1 0 20:15 ?     00:00:00 /usr/bin/pulseaudio --daemonize --log-target=syslog
bor    14701 14698 0 20:15 ?     00:00:00 /usr/lib/pulse/gconf-helper
bor    14703   1 0 20:15 ?     00:00:00 /usr/lib/gconfd-2 4
bor    14729   1 0 20:15 ?     00:00:00 s2u --daemon=yes
bor    14763   1 0 20:15 ?     00:00:00 kdeinit4: kdeinit4 Run up
bor    14764 14763 0 20:15 ?     00:00:00 klauncher
bor    14767   1 0 20:15 ?     00:00:00 kded4
bor    14772 14552 0 20:15 ?     00:00:00 kwrapper4 ksmserver
bor    14773 14763 0 20:15 ?     00:00:00 ksmserver
bor    14775 14773 0 20:15 ?     00:00:00 kwin
bor    14777   1 0 20:15 ?     00:00:00 /usr/bin/krunner
bor    14781   1 1 20:16 ?     00:00:03 /usr/bin/plasma
bor    14784   1 0 20:16 ?     00:00:00 /usr/bin/nepomukserver
bor    14794   1 0 20:16 ?     00:00:00 /usr/bin/kaccess
bor    14800 14763 0 20:16 ?     00:00:00 /usr/bin/xsettings-kde
bor    14806   1 0 20:16 ?     00:00:00 /usr/bin/klipper
bor    14812   1 0 20:16 ?     00:00:00 /usr/bin/ksensors
bor    14814   1 0 20:16 ?     00:00:00 kdeinit Running...                  
bor    14817   1 0 20:16 ?     00:00:00 dcopserver [kdeinit] --nosid --suicide    
bor    14819 14814 0 20:16 ?     00:00:00 klauncher [kdeinit] --new-startup        
bor    14821   1 0 20:16 ?     00:00:00 kded [kdeinit] --new-startup          
bor    14855   1 1 20:18 ?     00:00:01 /usr/bin/knotify4
bor    14859 14763 0 20:18 ?     00:00:00 kdeinit4: kio_file [kd up
bor    14929 13135 1 20:19 tty1   00:00:00 -zsh
bor    15103 14929 0 20:19 tty1   00:00:00 ps -fwwwu bor