[Bug 1807511] Missing required logs.

This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:

apport-collect 1807511

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
Status: New => Incomplete

** Tags added: cosmic

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https://bugs.launchpad.net/bugs/1807511

Title:
AMDGPU Radeon RX540 system freezes poor performance

Status in linux package in Ubuntu:
Incomplete

Bug description:
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

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