Comment # 7
on bug 107947
from Alex Smith
This is occurring for me on a Vega 64. When it occurs the machine boots to a black screen. It has started happening since upgrading to Fedora 27's 4.18.16, previously I was on 4.18.7 (does not happen there). I've since updated to Fedora 29, 4.18.16-300.fc29.x86_64, and it still happens there. [drm:generic_reg_wait [amdgpu]] *ERROR* REG_WAIT timeout 10us * 3500 tries - dce_mi_free_dmif line:636 WARNING: CPU: 6 PID: 122 at drivers/gpu/drm/amd/amdgpu/../display/dc/dc_helper.c:254 generic_reg_wait+0xe8/0x160 [amdgpu] Modules linked in: xt_CHECKSUM iptable_mangle ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack libcrc32c tun bridge stp llc ebtable_filter ebtables > ttm alx drm crc32c_intel mdio video CPU: 6 PID: 122 Comm: kworker/6:1 Not tainted 4.18.16-100.fc27.x86_64 #1 Hardware name: Gigabyte Technology Co., Ltd. Z170X-Gaming 3/Z170X-Gaming 3, BIOS F7 06/03/2016 Workqueue: events drm_mode_rmfb_work_fn [drm] RIP: 0010:generic_reg_wait+0xe8/0x160 [amdgpu] Code: 58 48 8b 4c 24 50 89 ee 8b 54 24 48 48 c7 c7 e0 93 75 c0 44 89 4c 24 08 e8 b5 4f c1 ff 41 83 7c 24 20 01 44 8b 4c 24 08 74 02 <0f> 0b 48 83 c4 10 44 89 c8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 0f af RSP: 0018:ffffb846441e7a78 EFLAGS: 00010297 RAX: 0000000000000000 RBX: 0000000000000dad RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff9365c1d96938 RDI: ffff9365c1d96938 RBP: 000000000000000a R08: 0000000000000473 R09: 0000000000000002 R10: 000000000000beee R11: ffffffff889a21ed R12: ffff93659551d900 R13: 00000000000035af R14: 0000000000000010 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff9365c1d80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000250e080 CR3: 00000005e720a005 CR4: 00000000003606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dce_mi_free_dmif+0xf7/0x180 [amdgpu] dce110_reset_hw_ctx_wrap+0x13f/0x1e0 [amdgpu] dce110_apply_ctx_to_hw+0x58/0x9e0 [amdgpu] ? _cond_resched+0x15/0x40 ? pp_dpm_dispatch_tasks+0x41/0x60 [amdgpu] ? amdgpu_pm_compute_clocks.part.9+0xb7/0x590 [amdgpu] dc_commit_state+0x30a/0x590 [amdgpu] amdgpu_dm_atomic_commit_tail+0x385/0xd70 [amdgpu] ? _cond_resched+0x15/0x40 ? wait_for_completion_timeout+0x3a/0x190 ? wait_for_completion_interruptible+0x35/0x1c0 commit_tail+0x3d/0x70 [drm_kms_helper] drm_atomic_helper_commit+0xfc/0x110 [drm_kms_helper] drm_framebuffer_remove+0x30d/0x400 [drm] drm_mode_rmfb_work_fn+0x4f/0x60 [drm] process_one_work+0x18f/0x370 worker_thread+0x30/0x380 ? process_one_work+0x370/0x370 kthread+0x113/0x130 ? kthread_create_worker_on_cpu+0x70/0x70 ret_from_fork+0x35/0x40 ---[ end trace 9529270edb28c719 ]---
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