https://bugs.freedesktop.org/show_bug.cgi?id=100398
--- Comment #4 from Mike Lothian mike@fireburn.co.uk --- I still get errors but they're slightly different this time:
[ 9.641782] [drm] PCIE GART of 4096M enabled (table at 0x0000000000040000). [ 9.691719] [drm] ring test on 0 succeeded in 11 usecs [ 9.693744] [drm] ring test on 9 succeeded in 3 usecs [ 9.695366] [drm] ring test on 1 succeeded in 44 usecs [ 9.697032] [drm] ring test on 2 succeeded in 30 usecs [ 9.698691] [drm] ring test on 3 succeeded in 37 usecs [ 9.700281] [drm] ring test on 4 succeeded in 45 usecs [ 9.701869] [drm] ring test on 5 succeeded in 23 usecs [ 9.703452] [drm] ring test on 6 succeeded in 51 usecs [ 9.704944] [drm] ring test on 7 succeeded in 29 usecs [ 9.706528] [drm] ring test on 8 succeeded in 31 usecs [ 9.707917] [drm] ring test on 10 succeeded in 5 usecs [ 9.709369] [drm] ring test on 11 succeeded in 6 usecs [ 9.759220] [drm] ring test on 12 succeeded in 1 usecs [ 9.760550] [drm] UVD initialized successfully. [ 9.974226] [drm] ring test on 13 succeeded in 0 usecs [ 9.975629] [drm] ring test on 14 succeeded in 2 usecs [ 9.977047] [drm] ring test on 15 succeeded in 3 usecs [ 9.978340] [drm] VCE initialized successfully. [ 15.836977] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 16.291409] amdgpu 0000:01:00.0: GPU pci config reset [ 21.034387] wlan0: authenticate with 78:3e:53:c0:2e:03 [ 21.077809] wlan0: send auth to 78:3e:53:c0:2e:03 (try 1/3) [ 21.078758] wlan0: authenticated [ 21.080481] wlan0: associate with 78:3e:53:c0:2e:03 (try 1/3) [ 21.083555] wlan0: RX AssocResp from 78:3e:53:c0:2e:03 (capab=0x11 status=0 aid=3) [ 21.086443] wlan0: associated [ 21.086455] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 21.088115] ath: EEPROM regdomain: 0x833a [ 21.088116] ath: EEPROM indicates we should expect a country code [ 21.088118] ath: doing EEPROM country->regdmn map search [ 21.088119] ath: country maps to regdmn code: 0x37 [ 21.088120] ath: Country alpha2 being used: GB [ 21.088121] ath: Regpair used: 0x37 [ 21.088122] ath: regdomain 0x833a dynamically updated by country IE [ 21.241486] wlan0: Limiting TX power to 23 (23 - 0) dBm as advertised by 78:3e:53:c0:2e:03 [ 40.917223] [drm] PCIE GART of 4096M enabled (table at 0x0000000000040000). [ 40.966588] [drm] ring test on 0 succeeded in 11 usecs [ 40.966966] [drm] ring test on 9 succeeded in 1 usecs [ 41.181390] [drm:gfx_v8_0_ring_test_ring] *ERROR* amdgpu: ring 1 test failed (scratch(0xC040)=0xCAFEDEAD) [ 41.340367] [drm:gfx_v8_0_ring_test_ring] *ERROR* amdgpu: ring 2 test failed (scratch(0xC040)=0xCAFEDEAD) [ 41.499547] [drm:gfx_v8_0_ring_test_ring] *ERROR* amdgpu: ring 3 test failed (scratch(0xC040)=0xCAFEDEAD) [ 41.657396] [drm:gfx_v8_0_ring_test_ring] *ERROR* amdgpu: ring 4 test failed (scratch(0xC040)=0xCAFEDEAD) [ 41.816496] [drm:gfx_v8_0_ring_test_ring] *ERROR* amdgpu: ring 5 test failed (scratch(0xC040)=0xCAFEDEAD) [ 41.976375] [drm:gfx_v8_0_ring_test_ring] *ERROR* amdgpu: ring 6 test failed (scratch(0xC040)=0xCAFEDEAD) [ 42.139328] [drm:gfx_v8_0_ring_test_ring] *ERROR* amdgpu: ring 7 test failed (scratch(0xC040)=0xCAFEDEAD) [ 42.296842] [drm:gfx_v8_0_ring_test_ring] *ERROR* amdgpu: ring 8 test failed (scratch(0xC040)=0xCAFEDEAD) [ 42.296845] [drm:amdgpu_resume] *ERROR* resume of IP block <gfx_v8_0> failed -22 [ 42.296847] [drm:amdgpu_device_resume] *ERROR* amdgpu_resume failed (-22). [ 42.304956] [drm:amdgpu_fill_buffer] *ERROR* Trying to clear memory with ring turned off. [ 42.304974] [drm:amdgpu_fill_buffer] *ERROR* Trying to clear memory with ring turned off.