It seems that it is corrected in Ubuntu : https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/121439
Can't be sure if this is the exact same bug but it seems likely. Do not hesitate to contact me if I can help you to test fixes. I will have this laptop only until next tuesday (14th) but won't have the harware after that. Thanks in advance if you could help Cheers LeTic
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