Comment # 24
on bug 111244
from miba_c@gmx.at
Having the same issue on a ThinkPad T495s (BIOS 1.06) with a Ryzen 7 PRO 3700U, Kernel 5.2.8-arch1-1-ARCH, Mesa 19.1.4-1 and running sway (wayland) as a window manager. dmesg shows me: [drm] Fence fallback timer expired on ring sdma0 amdgpu 0000:05:00.0: [drm:amdgpu_ib_ring_tests [amdgpu]] *ERROR* IB test failed on gfx (-110). [drm:amdgpu_device_ip_late_init_func_handler [amdgpu]] *ERROR* ib ring test failed (-110). One thing to note is that setting amd_iommu=off as a kernel parameter makes this issue really rare but it'll still sometimes happen, maybe it's also just luck.
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