https://bugs.freedesktop.org/show_bug.cgi?id=108992

--- Comment #21 from Zheng Luo <vicluo96@gmail.com> ---
With iommu=soft I still occasionally experience frozen screen with following
logs:

Jan 02 16:11:18 lzThinkpad gnome-shell[1647]: Failed to flip: Cannot allocate
memory
Jan 02 16:11:18 lzThinkpad kernel: amdgpu 0000:05:00.0: 00000000a2e0b642 pin
failed
Jan 02 16:11:18 lzThinkpad kernel: [drm:dm_plane_helper_prepare_fb [amdgpu]]
*ERROR* Failed to pin framebuffer with error -12

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