Özgür Caner, thank you for reporting this and helping make Ubuntu better. As per http://support.lenovo.com/us/en/products/laptops-and- netbooks/thinkpad-t-series-laptops/thinkpad-t540p an update to your computer's buggy and outdated BIOS is available (2.18). 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 For more on BIOS updates and linux, please see https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette . Please note your current BIOS is already in the Bug Description, so posting this on the old BIOS would not be helpful. As well, you don't have to create a new bug report. Once the BIOS is updated, and the information above is provided, then please mark this report Status Confirmed. Thank you for your understanding. ** Tags added: bios-outdated-2.18 ** Changed in: linux (Ubuntu) Importance: Undecided => Low ** 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/1458922 Title: No sound output via HDMI/DisplayPort available on kernel 3.19.0-18 Status in linux package in Ubuntu: Incomplete Bug description: Using the latest kernel 3.19.0-18 on vivid no sound output via HDMI/DP is available in the sound settings dialog, which is/was available with the previous kernel version 3.19.0-16 . ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: linux-image-3.19.0-18-generic 3.19.0-18.18 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/controlC1: oc 2596 F.... pulseaudio CurrentDesktop: Unity Date: Tue May 26 17:41:08 2015 HibernationDevice: RESUME=UUID=152a3be6-b096-40db-911e-8459e7b93e8c InstallationDate: Installed on 2014-09-01 (267 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) MachineType: LENOVO 20BE00B8GE ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-18-generic root=UUID=9fbb762e-9015-479c-8f43-8d9750487156 ro quiet splash nomdmonddf nomdmonisw nomdmonddf nomdmonisw 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 UpgradeStatus: Upgraded to vivid on 2015-05-13 (12 days ago) dmi.bios.date: 05/15/2014 dmi.bios.vendor: LENOVO dmi.bios.version: GMET65WW (2.13 ) dmi.board.asset.tag: Not Available dmi.board.name: 20BE00B8GE dmi.board.vendor: LENOVO dmi.board.version: SDK0E50510 Pro dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrGMET65WW(2.13):bd05/15/2014:svnLENOVO:pn20BE00B8GE:pvrThinkPadT540p:rvnLENOVO:rn20BE00B8GE:rvrSDK0E50510Pro:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 20BE00B8GE dmi.product.version: ThinkPad T540p dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1458922/+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