Do churches in Lausanne ring bells all night long ?
Of course not. Furthermore, there are strict cantonal regulations concerning noise in night time hours.
Bells here (Martigny) start at 0600 and end at midnight. In some places this is different - I remember in Obergesteln for example the bells rang every 15mins all night. And in some places they also ring twice on the hour - one set with the number for the hour and then a couple of minutes later another set in case you missed the count on the first one!
Lausanne has the "guet" - a crier who shouts from the cathedral. See this for more information:
and this (French only though)
If your hotel is near the cathedral you will hear the crier.
Thanks! The info you posted is very interesting!