I've finally found out why this happens. The two processes use the Tk
send function to communicate with each other which only worls, when the
xhost list is empty. For some reason, my xhost list wasn't empty but
contained these entries:
b...@sakura:~$ xhost
access control enabled, only authorized clients can connect
SI:localuser:bodo
SI:localuser:gdm
SI:localuser:root
These entries are added by /etc/X11/Xsession.d/60x11-common_localhost
contained in x11-common.
b...@sakura:~$ apt-cache policy x11-common
x11-common:
Installed: 1:7.4+3ubuntu10
Candidate: 1:7.4+3ubuntu10
Version table:
*** 1:7.4+3ubuntu10 0
500 http://de.archive.ubuntu.com karmic-updates/main Packages
100 /var/lib/dpkg/status
1:7.4+3ubuntu7 0
500 http://de.archive.ubuntu.com karmic/main Packages
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exmh-bg dying, becoming a zombie
https://bugs.launchpad.net/bugs/430697
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