> > I actually like to use the onboard hdmi for audio and also would like to fix the previous issue. The output device still sticky. Attached is the output of pactl list. > > Does the graphic driver really allow you to use audio but without using graphic or enable graphic without audio ? xrandr --output HDMI2 --set audio off Did you select HDMI.monitor as default source ? Source #0 State: RUNNING Name: alsa_output.pci-0000_00_1b.0.hdmi-stereo-extra2.monitor Description: Monitor of Built-in Audio Digital Stereo (HDMI) Driver: module-alsa-card.c Sample Specification: s16le 2ch 44100Hz Channel Map: front-left,front-right Owner Module: 7 Mute: no Volume: 0: 100% 1: 100% 0: 0.00 dB 1: 0.00 dB balance 0.00 Base Volume: 100% 0.00 dB Monitor of Sink: alsa_output.pci-0000_00_1b.0.hdmi-stereo-extra2 Latency: 0 usec, configured 20000 usec Flags: DECIBEL_VOLUME LATENCY Properties: device.description = "Monitor of Built-in Audio Digital Stereo (HDMI)" device.class = "monitor" alsa.card = "0" alsa.card_name = "HDA Intel PCH" alsa.long_card_name = "HDA Intel PCH at 0xf7e00000 irq 58" alsa.driver_name = "snd_hda_intel" device.bus_path = "pci-0000:00:1b.0" sysfs.path = "/devices/pci0000:00/0000:00:1b.0/sound/card0" device.bus = "pci" <a href="http://device.vendor.id">device.vendor.id</a> = "8086" <a href="http://device.vendor.name">device.vendor.name</a> = "Intel Corporation" <a href="http://device.product.id">device.product.id</a> = "1c20" <a href="http://device.product.name">device.product.name</a> = "6 Series/C200 Series Chipset Family High Definition Audio Controller" device.form_factor = "internal" device.string = "0" module-udev-detect.discovered = "1" device.icon_name = "audio-card-pci" Formats: pcm Source #2 State: RUNNING Name: VirtualDefault.monitor Description: Monitor of VirtualDefault Driver: module-null-sink.c Sample Specification: s16le 2ch 44100Hz Channel Map: front-left,front-right Owner Module: 24 Mute: no Volume: 0: 100% 1: 100% 0: 0.00 dB 1: 0.00 dB balance 0.00 Base Volume: 100% 0.00 dB Monitor of Sink: VirtualDefault Latency: 0 usec, configured 20000 usec Flags: DECIBEL_VOLUME LATENCY Properties: device.description = "Monitor of VirtualDefault" device.class = "monitor" device.icon_name = "audio-input-microphone" Formats: pcm