[Bug 111416] 4k 60hz on RX 560 over HDMI = no sound

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Bug ID 111416
Summary 4k 60hz on RX 560 over HDMI = no sound
Product DRI
Version XOrg git
Hardware x86-64 (AMD64)
OS Linux (All)
Status NEW
Severity normal
Priority medium
Component DRM/AMDgpu
Assignee dri-devel@lists.freedesktop.org
Reporter freedesktop@azelphur.com

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


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