@Dave Jones, Koba,
I can confirm the following (RX560) :
5.19.9000-37-generic, Resolution 3840x2180, refresh rate 60Hz, audio speed up issue
5.19.9000-37-generic, Resolution 1920x1080, refresh rate 60Hz, no audio speed up issue
5.19.9000-37-generic, Resolution 3840x2180, refresh rate 30Hz, no audio speed up issue
5.19.0-21-generic, Resolution 3840x2180, refresh rate 60Hz, audio speed up issue
5.19.0-21-generic, Resolution 1920x1080, refresh rate 60Hz, no audio speed up issue
5.19.0-21-generic, Resolution 3840x2180, refresh rate 30Hz, no audio speed up issue
5.15.0-67-generic, Resolution 3840x2180, refresh rate max 30Hz, to set 60Hz is not possible
5.19.0-67-generic, Resolution 1920x1080, refresh rate 60Hz, no audio speed up issue
5.19.0-67-generic, Resolution 3840x2180, refresh rate 30HZ, no audio speed up issue
@Dave Jones, Koba, 37-generic, Resolution 3840x2180, refresh rate 60Hz, audio speed up issue 37-generic, Resolution 1920x1080, refresh rate 60Hz, no audio speed up issue 37-generic, Resolution 3840x2180, refresh rate 30Hz, no audio speed up issue
I can confirm the following (RX560) :
5.19.9000-
5.19.9000-
5.19.9000-
5.19.0-21-generic, Resolution 3840x2180, refresh rate 60Hz, audio speed up issue
5.19.0-21-generic, Resolution 1920x1080, refresh rate 60Hz, no audio speed up issue
5.19.0-21-generic, Resolution 3840x2180, refresh rate 30Hz, no audio speed up issue
5.15.0-67-generic, Resolution 3840x2180, refresh rate max 30Hz, to set 60Hz is not possible
5.19.0-67-generic, Resolution 1920x1080, refresh rate 60Hz, no audio speed up issue
5.19.0-67-generic, Resolution 3840x2180, refresh rate 30HZ, no audio speed up issue