4k 60hz on RX 560 over HDMI = no sound

Submitted by Alfie Day

Assigned to Default DRI bug account

Link to original bug (#111416)

Description

Hi,

If I switch to 4k 60hz on my RX 560, sound instantly drops out.

I can enable/disable sound by running
xrandr --output HDMI-A-0 --mode 3840x2160 -r 30
xrandr --output HDMI-A-0 --mode 3840x2160 -r 60

No messages appear in dmesg or Xorg log when switching between 30/60hz. So I'm not sure what information to provide with aiding debugging. Please let me know!

I'm using a custom modeline since 4k 60hz option is unavailable by default (see bug #111412) this is the modeline I am using:

Modeline "3840x2160" 594 3840 4016 4104 4400 2160 2168 2178 2250 +hsync +vsync