Created attachment 288099 [details]
journalctl dump drm.debug=6 grub set

my gpu: msi radeon rx 470 gaming x 4g
my cpu: amd r7 3700x
my motherboard: asus prime x370-pro

Tested kernels: user-pc 5.5.13-1-MANJARO, 5.6rc7, linux-next git, amd-staging-drm-next, drm-next from "https://cgit.freedesktop.org/~agd5f/linux/" link. 

Tried grub settings(not solution): "amdgpu.aspm=0 amdgpu.bapm=0 amdgpu.compute_multipipe=0 amdgpu.cwsr_enable=0 amdgpu.dpm=0 amdgpu.discovery=0 amdgpu.exp_hw_support=1 amdgpu.gpu_recovery=0 amdgpu.lbpw=0 amdgpu.msi=0 amdgpu.pcie_gen2=0 amdgpu.noretry=0 amdgpu.ras_enable=0 amdgpu.runpm=0 amdgpu.sched_policy=2 amdgpu.sdma_phase_quantum=0 ccp.max_devs=0 acpi_osi=Linux video=efifb:nobgrt"

Also tried add "export AMD_DEBUG=nodcc" to '/etc/environment' Not solution.

Also tried iommu grub settings. Not solution. 

I'm using picom compositor on startup of xfce. Problem (A) occurs when using picom.( picom stable version v7.5 from manjaro ) I will add a video's screenshot for this. I'm using manjaro xfce testing branch. 

Problem (B) occurs every time.

My other links for this problem:

https://forum.manjaro.org/t/amdgpu-polaris-opengl-vulkan-starting-artifact/130501

Video:

https://streamable.com/85qxm

(A) Instant graphic corruption occurs during login ( i will add a video's screenshot for this ) This problem occurs picom autostarted xfce or kde login. 

My startup setttings for picom:

"picom --experimental-backends --backend glx --use-damage --glx-no-rebind-pixmap --glx-no-stencil --unredir-if-possible --vsync -b"

I found temporary fix for this problem. I changed picom autostart with this: "sh -c "sleep 3 && picom --experimental-backends --backend glx --use-damage --glx-no-rebind-pixmap --glx-no-stencil --unredir-if-possible --vsync -b""

(B) Instant screen corruption or artifact for game starting. I see this on two games. Dote underlors and albion online. I will add a video's screenshot for this.

I'm added attachment. Dump of journalctl drm.debug=6 grub set.