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 126.96.36.199. Only version 188.8.131.52 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?