Markus,
If you read the messages in this thread, you can see that it has been more or less solved.
'More or less' because Pharo runs fine now, but when I reboot Ubuntu I get a systemerror with as subject Pharo-vm.
This has been probably caused by my different attempts to make this work (with different methods) which may have left some 'rubble' causing this.
I should probably re-install Ubuntu soon. Which I do now and then anyway.
Thanks, kind regards, Leo Noordhuizen