I have tried another linux version (Fedora 21). The sound doesn't work. I upgraded my Ubuntu distribution to 15, the sound doesn't work more.
I tested the bios whit some utility, I had the results of the tests as an attachment ** Attachment added: "fwts results" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1441852/+attachment/4376711/+files/results.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1441852 Title: Audio broken on HP Spectre x360, broadwell-U audio controller To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1441852/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs