DisplayPort displays cannot enable after turn off

[vitaly-zdanevich]

Hi, I have 4 displays:
4k HDMI - works ok
3 Dell U2415 on daisy chain - and after I turn off the main one - only Gentoo restart helps to enable it again. And sometimes Gentoo freezes when I am trying to enable.

Also cannot enable after
xset dpms force off

Tried to add to
/etc/X11/xorg.conf.d/20-power.conf
Option "DPMS" "true"

to have

Section "ServerFlags"
Option "SuspendTime" "0"
Option "BlankTime" "0"
Option "StandbyTime" "0"

Option "DPMS" "true"
EndSection

Also tried switch tty and go back.

My kernel config https://gitlab.com/vitaly-zdanevich-configs/linux-kernel-thinkpad-t430/-/blob/dc68fe82392e5e2022e6807c817947d3af775504/.config

My CPU is AMD 7950x - and I have the same problem with GPU AMD 6800 XT.

Please help.