After I had done a vasm autodetect hardware which gave afterwards some problems with the CD I cannot now be heard in 3 versions of skype: 1.3.0.*, 1.4.0.* and 18.104.22.168. Only version 22.214.171.124 can be used the other 3 fail the echo123 test.
Launching skype from a terminal there are no error messages.
In VL-5.9 all 3 versions perform properly.
Could it be again some settings under udev that was messed-up by vasm and which one?