Hi Luis, 1. May you also test earlier kernel? v4.17 or v4.16. 2. May you test the issue only with amdgpu? Thanks JimQu ________________________________________ å??件人: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> 代表 LuÃs Mendes <luis.p.mendes at gmail.com> å??é??æ?¶é?´: 2018å¹´7æ??11æ?¥ 6:04:00 æ?¶ä»¶äºº: Michel Dänzer; Koenig, Christian; amd-gfx list 主é¢?: Re: Regression with kernel 4.18 - AMD RX 550 fails IB ring test on power-up Hi, Issue remains in kernel 4.18-rc4 using SAPPHIRE RX 550 4GB. Logs follow attached. Regards, Luis On Tue, Jun 26, 2018 at 10:08 AM, LuÃs Mendes <luis.p.mendes at gmail.com<mailto:luis.p.mendes at gmail.com>> wrote: Hi, I've tried kernel 4.18-rc2 on a system with a NVIDIA GTX 1050 Ti and an AMD RX 550 4GB and the RX 550 card is failing the IB ring test. [ 5.033217] [drm:gfx_v8_0_ring_test_ib [amdgpu]] *ERROR* amdgpu: ib test failed (scratch(0xC040)=0xFFFFFFFF) [ 5.033264] [drm:amdgpu_ib_ring_tests [amdgpu]] *ERROR* amdgpu: failed testing IB on ring 6 (-22). Please see the attached log. Regards, LuÃs