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.
This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1712427
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.