Gabriel Zhi Chen, as per http://support.lenovo.com/us/en/products /laptops-and-netbooks/thinkpad-t-series-laptops/thinkpad-t450 an update to your computer's buggy and outdated BIOS is available (1.13). If you update to this following https://help.ubuntu.com/community/BIOSUpdate does it change anything?
If it doesn't, could you please both specify what happened, and provide the output of the following terminal command: sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date Once the BIOS is updated, and the information above is provided, then please mark this report Status New. Thank you for your understanding. ** Description changed: CID : 201502-16842 Lenovo T450 Steps: 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. - ProblemType: Bug - DistroRelease: Ubuntu 14.04 - Package: linux-image-3.16.0-30-generic 3.16.0-30.40~14.04.1 [modified: boot/vmlinuz-3.16.0-30-generic] - ProcVersionSignature: Ubuntu 3.16.0-30.40~14.04.1-generic 3.16.7-ckt3 - Uname: Linux 3.16.0-30-generic x86_64 - ApportVersion: 2.14.1-0ubuntu3.7 - Architecture: amd64 - CurrentDesktop: Unity - Date: Thu May 14 00:40:56 2015 - InstallationDate: Installed on 2015-05-11 (3 days ago) - InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1) - SourcePackage: linux-lts-utopic - UpgradeStatus: No upgrade log present (probably fresh install) - --- + --- ApportVersion: 2.14.1-0ubuntu3.7 Architecture: amd64 AudioDevicesInUse: - USER PID ACCESS COMMAND - /dev/snd/controlC1: u 1655 F.... pulseaudio - /dev/snd/controlC0: u 1655 F.... pulseaudio + USER PID ACCESS COMMAND + /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 RelatedPackageVersions: - 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 + 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 - --- - ApportVersion: 2.14.1-0ubuntu3.7 - Architecture: amd64 - AudioDevicesInUse: - USER PID ACCESS COMMAND - /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 - RelatedPackageVersions: - 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 ** Attachment removed: "Dependencies.txt" https://bugs.launchpad.net/ubuntu/+source/linux-lts-utopic/+bug/1454938/+attachment/4397156/+files/Dependencies.txt ** Attachment removed: "ProcEnviron.txt" https://bugs.launchpad.net/ubuntu/+source/linux-lts-utopic/+bug/1454938/+attachment/4397157/+files/ProcEnviron.txt ** Tags added: bios-outdated-1.13 ** Changed in: linux-lts-utopic (Ubuntu) Importance: Undecided => Low ** Changed in: linux-lts-utopic (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-lts-utopic in Ubuntu. https://bugs.launchpad.net/bugs/1454938 Title: [Lenovo T450] BT devices connected successfully 1 minute later, it will disconnect automatically. [8087:0a2a] -- 14.04.2 Status in HWE Next Project: New Status in linux-lts-utopic package in Ubuntu: Incomplete Bug description: CID : 201502-16842 Lenovo T450 Steps: 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 AudioDevicesInUse: USER PID ACCESS COMMAND /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 RelatedPackageVersions: 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 To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1454938/+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