Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.19 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.1-unstable/ ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- 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/1469145 Title: Bluetooth device sometimes instantly turns off again after turning it on Status in linux package in Ubuntu: Incomplete Bug description: Sometimes when turning on bluetooth in the gnome bluetooth panel, it is shown as "On" for like a second and reverts back to "Off". This is what I see in dmesg: [1199362.625284] usb 1-1.4: Product: Broadcom Bluetooth Device [1199362.625286] usb 1-1.4: Manufacturer: Broadcom Corp [1199362.625287] usb 1-1.4: SerialNumber: EC55F9EFBB65 [1199362.839031] usb 1-1.4: USB disconnect, device number 10 [1199371.232776] usb 1-1.4: new full-speed USB device number 11 using ehci-pci [1199371.330552] usb 1-1.4: New USB device found, idVendor=0a5c, idProduct=217f [1199371.330556] usb 1-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [1199371.330559] usb 1-1.4: Product: Broadcom Bluetooth Device [1199371.330560] usb 1-1.4: Manufacturer: Broadcom Corp [1199371.330562] usb 1-1.4: SerialNumber: EC55F9EFBB65 [1199371.544424] usb 1-1.4: USB disconnect, device number 11 This situation is usually triggered after waking up from suspend, and then permanent up to the next reboot. I would assume the USB disconnect is the problem. I don't have bluetooth disabled in the BIOS settings. ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: linux-generic 3.19.0.21.20 ProcVersionSignature: Ubuntu 3.19.0-18.18-generic 3.19.6 Uname: Linux 3.19.0-18-generic x86_64 ApportVersion: 2.17.2-0ubuntu1.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/pcmC0D0p: jonas 1889 F...m pulseaudio /dev/snd/controlC0: jonas 1889 F.... pulseaudio CurrentDesktop: GNOME Date: Fri Jun 26 14:18:56 2015 MachineType: LENOVO 429137G ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-18-generic root=UUID=ee26293f-6471-4bb2-abe2-a8faf67adf96 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.19.0-18-generic N/A linux-backports-modules-3.19.0-18-generic N/A linux-firmware 1.143.1 SourcePackage: linux UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/01/2011 dmi.bios.vendor: LENOVO dmi.bios.version: 8DET56WW (1.26 ) dmi.board.asset.tag: Not Available dmi.board.name: 429137G 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:bvr8DET56WW(1.26):bd12/01/2011:svnLENOVO:pn429137G:pvrThinkPadX220:rvnLENOVO:rn429137G:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 429137G 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/1469145/+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
