Hi, I think I got a little further! The 4.4.0-21 seemed to work flawlessly, untill I found out that when enabling bluetooth I got the freezes. It even worked fine at first, but because the sound was crappy I changed the headphones profile to A2DP and then the freezes started as soon as I had network traffic by file transfer!
I can reproduce the freeze now by simply ding a file transfer over the network (over wifi) and then enable bluetooth. In the 4.4.0 and the 4.6.0 the bluetooth patch is present that tries to load the driver and the BCM.hcd file in /lib/firmware/brcm/ . This explains why the 4.2.0 kernel : 4.2.0-040200-generic #201510260713 SMP Mon Oct 26 11:14:43 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux seems to run fine, because it does not load any bluetooth driver. On that one I see from dmesg: [ 7.274842] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 7.274854] Bluetooth: BNEP filters: protocol multicast [ 7.274870] Bluetooth: BNEP socket layer initialized On the 4.4.21 with the bt support I see: [ 14.519814] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 14.519821] Bluetooth: BNEP filters: protocol multicast [ 14.519828] Bluetooth: BNEP socket layer initialized [ 15.524279] Bluetooth: hci0: BCM: Reading local version info failed (-110) [ 15.589273] Bluetooth: hci0: BCM: chip id 70 [ 15.605441] Bluetooth: hci0: BCM43142A [ 15.605450] Bluetooth: hci0: BCM (001.001.011) build 0000 [ 16.218220] Bluetooth: hci0: BCM (001.001.011) build 0172 [ 16.235944] Bluetooth: hci0: Broadcom Bluetooth Device (43142) The strange this is that it seems to have something to do with the audio profile. It all worked fine with just crappy bluetooth audio until I tried to change the profile. Strange there was that it didn't work neatly either, it required putting switches on and off and sometimes reloading the btusb driver. Anyway, since I seem to have something reproducable, how can I proceed? Thank you for the help! -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1562618 Title: whole OS freezes seemingly randomly Status in linux package in Ubuntu: Incomplete Bug description: I had some random freezes of the whole operating system. No caps lock response or terminal switching, nothng. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-15-generic 4.4.0-15.31 ProcVersionSignature: Ubuntu 4.4.0-15.31-generic 4.4.6 Uname: Linux 4.4.0-15-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.20-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: vincent 1714 F.... pulseaudio CurrentDesktop: Unity Date: Sun Mar 27 23:46:02 2016 HibernationDevice: RESUME=UUID=8180a7b6-a1c0-494a-9f65-99a7b54f6deb InstallationDate: Installed on 2015-11-01 (147 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) MachineType: LENOVO 20332 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-15-generic.efi.signed root=UUID=44fb018f-3dbd-4eb6-ab9a-6668de8d13d2 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-15-generic N/A linux-backports-modules-4.4.0-15-generic N/A linux-firmware 1.157 SourcePackage: linux UpgradeStatus: Upgraded to xenial on 2016-03-25 (2 days ago) dmi.bios.date: 12/26/2013 dmi.bios.vendor: LENOVO dmi.bios.version: 92CN26WW(V1.06) dmi.board.asset.tag: NO Asset Tag dmi.board.name: AIUU1 dmi.board.vendor: LENOVO dmi.board.version: 31900042STD dmi.chassis.asset.tag: NO Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo Yoga 2 11 dmi.modalias: dmi:bvnLENOVO:bvr92CN26WW(V1.06):bd12/26/2013:svnLENOVO:pn20332:pvrLenovoYoga211:rvnLENOVO:rnAIUU1:rvr31900042STD:cvnLENOVO:ct10:cvrLenovoYoga211: dmi.product.name: 20332 dmi.product.version: Lenovo Yoga 2 11 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1562618/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp