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 v4.13 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'. 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/v4.13-rc6 ** 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/1712427 Title: No audio output to Speakers when HDMI cable removed Status in linux package in Ubuntu: Incomplete Bug description: The Sound Settings dialog in Unity allows to switch between various audio outputs. If HDMI is selected and the cable removed the dialog shows that Speakers are selected. But there is no audio. To actually output audio to speakers one needs to click some other output ("Simultaneous output ...") and then again on Speakers. The expected behaviour would be to actually play audio on the speakers without the need to switch forth and back. --- ApportVersion: 2.20.1-0ubuntu2.10 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: brain 2435 F.... pulseaudio /dev/snd/controlC1: brain 2435 F.... pulseaudio CurrentDesktop: Unity DistroRelease: Ubuntu 16.04 HibernationDevice: RESUME=UUID=5165b586-2b44-4e4b-be49-177090e3b609 InstallationDate: Installed on 2015-05-26 (819 days ago) InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) MachineType: ASUSTeK COMPUTER INC. N501JW Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.10.0-33-generic root=UUID=299cfed8-e49e-40d4-a8dd-fd66089e6d8a ro quiet splash iwlwifi.power_save=1 iwlwifi.power_level=5 acpi_osi= acpi_backlight=vendor acpi_enforce_resources=lax acpi=force nmi_watchdog=0 drm.vblankoffdelay=1 i915.semaphores=1 i915.enable_rc6=7 i915.lvds_downclock=1 rcutree.rcu_idle_gp_delay=1 pcie_aspm=force i915.enable_psr=1 i915.enable_fbc=1 i915.disable_power_well=1 vt.handoff=7 ProcVersionSignature: Ubuntu 4.10.0-33.37~16.04.1-generic 4.10.17 RelatedPackageVersions: linux-restricted-modules-4.10.0-33-generic N/A linux-backports-modules-4.10.0-33-generic N/A linux-firmware 1.157.12 Tags: xenial Uname: Linux 4.10.0-33-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm bumblebee cdrom dialout dip disk lp lpadmin opt plugdev sambashare sudo vboxusers wireshark _MarkForUpload: True dmi.bios.date: 08/03/2015 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: N501JW.210 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: N501JW dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: 1.0 dmi.chassis.asset.tag: ATN12345678901234567 dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTeK COMPUTER INC. dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrN501JW.210:bd08/03/2015:svnASUSTeKCOMPUTERINC.:pnN501JW:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnN501JW:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0: dmi.product.name: N501JW dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK COMPUTER INC. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1712427/+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
