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[Bug 1454938] Re: [Lenovo T450] BT devices connected successfully 1 minute later, it will disconnect automatically. [8087:0a2a] -- 14.04.2


Gabriel Zhi Cen, could you please test the latest upstream kernel
available from the very top line at the top of the page (the release
names are irrelevant for testing, and please do not test the daily
folder) following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will
allow additional upstream developers to examine the issue.

If the test did not allow you to test to the issue (ex. you couldn't boot into the OS) please make a comment in your report about this, and continue to test the next most recent kernel version until you can test to the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags by clicking on the yellow circle with a black pencil icon, next to the word Tags, located at the bottom of the report description:

Where XY and Z are numbers corresponding to the kernel version.

If the mainline kernel does not fix this bug, please add the following tags:

Please note, an error to install the kernel does not fit the criteria of

Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results.

Thank you for your understanding.

** Tags removed: bios-outdated-1.13
** Tags added: latest-bios-1.14

** Changed in: linux-lts-utopic (Ubuntu)
   Importance: Low => Medium

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  [Lenovo T450] BT devices connected successfully 1 minute later, it
  will disconnect automatically. [8087:0a2a] -- 14.04.2

Status in HWE Next Project:
Status in linux-lts-utopic package in Ubuntu:

Bug description:
  CID : 201502-16842 Lenovo T450

  1. Install 14.04.2 on Lenovo T450
  2. Log in system and connect BT devices (Mouse, keyboard, headset or mobile phone...)
  3. After BT device connect, wait 1 minute and verify the result.

  Expected result:
  BT device connect remaining and available all time.

  Actual result:
  BT deviceconnected 1 minute later, it will disconnect automatically.

  ApportVersion: 2.14.1-0ubuntu3.7
  Architecture: amd64
   /dev/snd/controlC1:  u          1655 F.... pulseaudio
   /dev/snd/controlC0:  u          1655 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 14.04
  HibernationDevice: RESUME=UUID=01240a83-2e9e-4951-8c40-94b759934ce3
  InstallationDate: Installed on 2015-05-11 (3 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
  MachineType: LENOVO 20BUZ0BTUS
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-30-generic root=UUID=18c52354-b721-4d40-b110-39737086d3d1 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.16.0-30.40~14.04.1-generic 3.16.7-ckt3
   linux-restricted-modules-3.16.0-30-generic N/A
   linux-backports-modules-3.16.0-30-generic  N/A
   linux-firmware                             1.127.11
  Tags:  trusty
  Uname: Linux 3.16.0-30-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 02/03/2015
  dmi.bios.vendor: LENOVO
  dmi.bios.version: JBET45WW (1.10 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20BUZ0BTUS
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0E50510 WIN
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.modalias: dmi:bvnLENOVO:bvrJBET45WW(1.10):bd02/03/2015:svnLENOVO:pn20BUZ0BTUS:pvrThinkPadT450:rvnLENOVO:rn20BUZ0BTUS:rvrSDK0E50510WIN:cvnLENOVO:ct10:cvrNone:
  dmi.product.name: 20BUZ0BTUS
  dmi.product.version: ThinkPad T450
  dmi.sys.vendor: LENOVO

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