RX580 Displayport no signal

cullenmq

New member
Joined
Jan 11, 2021
Messages
2
Recently upgraded to Big Sur from Catalina, and mostly everything works! Have an Asrock x570 Taichi MB, Ryzen 3900X, Sapphire Pulse RX580 with OC 0.6.5. My main monitor (lenovo 4K) when connected via DP works fine when booting in verbose mode, but as soon as the OS is loaded the monitor goes black and says no signal. The hdmi ports work fine. Any thoughts on what the issue might be?
 

baronerosso

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Donator
Joined
Sep 29, 2020
Messages
53
sometimes I have this problem too with my x570 Taichi, even with agdpmod=pikera boot flag

PC is working, you can login in with ssh.
Try a “blind” login. Exemple, if your username is cullenmq type c and a return on keyboard and after your password and return. After few second you can see something verbose on screen and after the login screen.
 

baronerosso

Donator
Donator
Joined
Sep 29, 2020
Messages
53
maybe can help pmset

In Terminal type

pmset -g

look at gpuswitch

  • 2 is integrated gpu both on cable and battery
  • 1 is dedicated gpu only with power connected; integrated gpu on battery power
  • 0 is dedicated gpu on both ac and battery

usually is set to 2, but for us is better setting it to 0

sudo pmset -a gpuswitch 0
 
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