Ubuntu
alsa-driver package

  1. Bug #1580882
  2. Comment #7

Comment 7 for bug 1580882

Revision history for this message
John Axel Eriksson (johnae) wrote : Re: [, Intel Broadwell HDMI, Digital Out, HDMI] Sound like half speed

Same problem here. Asus Laptop UX305fa. Half-speed sound when connected via 3.5 mm to external monitor conntected via HDMI.
For me this started happening after upgrading from 15.10 to 16.04. I can get around the issue by rebooting my machine after connecting the external monitor... which ofc isn't a solution, just an ugly workaround for now.

cat /proc/asound/cards
 0 [HDMI ]: HDA-Intel - HDA Intel HDMI
                      HDA Intel HDMI at 0xf711c000 irq 50
 1 [PCH ]: HDA-Intel - HDA Intel PCH
                      HDA Intel PCH at 0xf7118000 irq 47