[Bug 109628] WARNING at dcn10_hw_sequencer.c:868 dcn10_verify_allow_pstate_change_high()

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109628

--- Comment #24 from towo at siduction.org ---
Same problem here on my Ideapad 330

Machine:   Type: Laptop System: LENOVO product: 81D2 v: Lenovo ideapad
330-15ARR serial: <root required> 
           Mobo: LENOVO model: LNVNB161216 v: SDK0J40709 WIN serial: <root
required> UEFI: LENOVO v: 7VCN47WW date: 04/25/2019 
Graphics:  Device-1: AMD Raven Ridge [Radeon Vega Series / Radeon Vega Mobile
Series] driver: amdgpu v: kernel 
           Display: server: X.org 1.20.4 driver: amdgpu,ati unloaded:
fbdev,modesetting,vesa tty: 211x40

I have not used suspend. Lightdm starts without problem.
Cinnamon is working fine but XFCE4 ends up with that kernel oops and black
screen.
I have found out, that the compositor in xfwm4 is the culprint, if i disable
that compositor, xfce is running fine. Even if i use compton as compositor,
xfce is starting fine.

Then i also reveted 

https://github.com/freedesktop/xorg-xf86-video-amdgpu/commit/a2b32e72fdaff3007a79b84929997d8176c2d512

and now xfce is running without problem/black screen with internal compositor
activated.

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