Bernd Porr, the next step is to fully commit bisect from kernel 3.13 to 4.4 in order to identify the last good kernel commit, followed immediately by the first bad one. This will allow for a more expedited analysis of the root cause of your issue. Could you please do this following https://wiki.ubuntu.com/Kernel/KernelBisection ?
Please note, finding adjacent kernel versions is not fully commit bisecting. Also, the kernel release names are irrelevant for the purposes of bisecting. It is most helpful that after the fix commit (not kernel version) has been identified, you then mark this report Status Confirmed. Thank you for your help. ** No longer affects: linux (Ubuntu) -- 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/1611532 Title: bluetooth USB dongle CSR8510 causes system freeze Status in linux package in Ubuntu: Incomplete Bug description: - Do a rfcomm bind. - Try a cat /dev/rfcomm0 In about 50% of cases the system completely freezes. In the other 40% the rfcomm data is garbled. In the remaining 10% the data is fine. The bt device at the other end is an RN42 which transmits text data. When scanning for devices often the bt name is not displayed or is shown as unknown. It worked perfectly under the previous LTS (precise) which was a 32 bit version. The xenial I'm using now is a 64bit version. I've tried it on two computers and the behaviour is the same (both 64 bit versions) Description: Ubuntu 16.04.1 LTS Release: 16.04 Linux bp1-ThinkPad-X220 4.4.0-34-generic #53-Ubuntu SMP Wed Jul 27 16:06:39 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-31-generic 4.4.0-31.50 [modified: boot/vmlinuz-4.4.0-31-generic] ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15 Uname: Linux 4.4.0-34-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: bp1 3466 F.... pulseaudio CurrentDesktop: Unity Date: Tue Aug 9 22:57:18 2016 HibernationDevice: RESUME=UUID=8159b870-9b8b-418d-ba7f-681dacd3fb94 InstallationDate: Installed on 2016-07-24 (16 days ago) InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) MachineType: LENOVO 4291SX7 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-34-generic root=UUID=a4df6be3-87d1-4a4f-8576-2c3fc031806e ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-34-generic N/A linux-backports-modules-4.4.0-34-generic N/A linux-firmware 1.157.2 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/18/2013 dmi.bios.vendor: LENOVO dmi.bios.version: 8DET69WW (1.39 ) dmi.board.asset.tag: Not Available dmi.board.name: 4291SX7 dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr8DET69WW(1.39):bd07/18/2013:svnLENOVO:pn4291SX7:pvrThinkPadX220:rvnLENOVO:rn4291SX7:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 4291SX7 dmi.product.version: ThinkPad X220 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1611532/+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
