[Bug 1807511] [NEW] AMDGPU Radeon RX540 system freezes poor performance

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Various temporary UI freezes when booting Ubuntu 18.10.
dmesg reports various amdgpu warnings and errors.

Some examples (please read dmesg attachment for complete overview):
[drm:construct [amdgpu]] *ERROR* construct: Invalid Connector ObjectID from Adapter Service for connector index:2! type 0 expected 3
amdgpu: [powerplay] Voltage value looks like a Leakage ID but it's not patched
[drm:dc_create [amdgpu]] *ERROR* DC: Number of connectors is zero!
t is 0
[drm:amdgpu_uvd_ring_test_ib [amdgpu]] *ERROR* amdgpu: (0)IB test timed out.
[drm:amdgpu_ib_ring_tests [amdgpu]] *ERROR* amdgpu: failed testing IB on ring 12 (-110).
[drm:amdgpu_device_ip_late_init_func_handler [amdgpu]] *ERROR* ib ring test failed (-110).
[powerplay]
[drm:uvd_v6_0_enc_ring_test_ring [amdgpu]] *ERROR* amdgpu: ring 13 test failed
[drm:amdgpu_device_ip_resume_phase2 [amdgpu]] *ERROR* resume of IP block <uvd_v6_0> failed -110
[drm:amdgpu_device_resume [amdgpu]] *ERROR* amdgpu_device_ip_resume failed (-110).
[drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring gfx timeout, last signaled seq=1853, last emitted seq=1853
[drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring sdma0 timeout, last signaled seq=3110, last emitted seq=3110
[drm] No hardware hang detected. Did some blocks stall?
[drm] No hardware hang detected. Did some blocks stall?
[drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring sdma1 timeout, last signaled seq=2249, last emitted seq=2249
amdgpu: [powerplay]
failed to send message 261 ret is 0
amdgpu 0000:03:00.0: GPU pci config reset



Ubuntu 18.10 (64 bit) 4.18.0-12-generic

** Affects: linux (Ubuntu)
Importance: Undecided
Status: New


** Tags: amdgpu bot-comment
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AMDGPU Radeon RX540 system freezes poor performance
https://bugs.launchpad.net/bugs/1807511
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