On Wednesday 12 March 2014 08:12:11 Benjamin DE DARDEL wrote: > I think about upgrading the stable kernel with the testing kernel. > I don't know if it's a good idea !!! Why not try using backports first? I have done this. Currently I have: 3.12-0.bpo.1-amd64 If you think that the problem may be due to the kernel, this may help. Lisi