Comment # 9
on bug 106544
from Przemek
I am not sure if my problem is related, but on every boot I get WARNING message: [ 2791.454011] WARNING: CPU: 0 PID: 313 at drivers/gpu/drm/amd/amdgpu/../display/dc/dm_services.h:132 generic_reg_update_ex+0xe4/0x120 [ 2791.454015] Modules linked in: rfcomm overlay squashfs loop nf_conntrack_ipv6 nf_defrag_ipv6 ip6t_REJECT nf_reject_ipv6 xt_conntrack bnep ip_set nfnetlink ebtable_broute bridge stp llc ebtable_nat ebtable_filter ebtables ip6table_filter ip6_tables ipv6 uvcvideo ath3k videobuf2_vmalloc btusb videobuf2_memops videobuf2_v4l2 btintel videobuf2_common bluetooth videodev rtsx_usb_ms media ecdh_generic memstick rtsx_usb_sdmmc rtsx_usb kvm_amd kvm irqbypass ath9k crc32_pclmul ath9k_common ath9k_hw ghash_clmulni_intel serio_raw mac80211 sdhci_pci ath cqhci sdhci mmc_core cfg80211 xhci_pci xhci_hcd ehci_pci sp5100_tco ehci_hcd [ 2791.454079] CPU: 0 PID: 313 Comm: kworker/0:1 Tainted: G W 4.17.8-gentoo #1 [ 2791.454081] Hardware name: LENOVO 80E3/Lancer 5B2, BIOS A2CN45WW(V2.13) 08/04/2016 [ 2791.454087] Workqueue: events dm_irq_work_func [ 2791.454092] RIP: 0010:generic_reg_update_ex+0xe4/0x120 [ 2791.454094] RSP: 0018:ffffb25b80f27af8 EFLAGS: 00010246 [ 2791.454097] RAX: ffffb25b80f27b10 RBX: ffff950155d0fa80 RCX: 0000000000000000 [ 2791.454098] RDX: 0000000000006718 RSI: 0000000000000000 RDI: ffff95015187f000 [ 2791.454100] RBP: ffffb25b80f27b60 R08: 0000000000000000 R09: 0000000000000000 [ 2791.454102] R10: ffffb25b80f27b78 R11: 0000000000000001 R12: 0000000000000001 [ 2791.454103] R13: 0000000000000000 R14: ffff950155c8b400 R15: ffff9500ddd54408 [ 2791.454106] FS: 0000000000000000(0000) GS:ffff95015ec00000(0000) knlGS:0000000000000000 [ 2791.454107] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 2791.454109] CR2: 00007f0b7cff6018 CR3: 000000019b3d8000 CR4: 00000000000406f0 [ 2791.454110] Call Trace: [ 2791.454121] dce110_stream_encoder_update_hdmi_info_packets+0x36f/0x590 [ 2791.454127] dce110_apply_ctx_to_hw+0x70c/0x898 [ 2791.454133] dc_commit_state+0x319/0x5a0 [ 2791.454137] ? set_freesync_on_streams.part.6+0x46/0x240 [ 2791.454141] ? mod_freesync_set_user_enable+0x102/0x128 [ 2791.454146] amdgpu_dm_atomic_commit_tail+0x358/0xd40 [ 2791.454151] ? amdgpu_bo_pin_restricted+0x1af/0x278 [ 2791.454155] ? preempt_count_add+0x63/0x90 [ 2791.454160] ? _raw_spin_lock_irq+0xf/0x30 [ 2791.454163] ? _raw_spin_unlock_irq+0xe/0x20 [ 2791.454166] ? wait_for_completion_timeout+0xfa/0x110 [ 2791.454169] ? _raw_spin_lock_irq+0xf/0x30 [ 2791.454172] ? _raw_spin_unlock_irq+0xe/0x20 [ 2791.454175] ? wait_for_completion_interruptible+0x109/0x140 [ 2791.454178] ? dm_plane_helper_prepare_fb+0xd6/0x260 [ 2791.454184] commit_tail+0x38/0x60 [ 2791.454188] drm_atomic_helper_commit+0xf7/0x100 [ 2791.454192] dm_restore_drm_connector_state+0xe0/0x130 [ 2791.454196] handle_hpd_irq+0x65/0x90 [ 2791.454199] dm_irq_work_func+0x49/0x60 [ 2791.454203] process_one_work+0x1c6/0x3d8 [ 2791.454207] worker_thread+0x26/0x3c0 [ 2791.454211] ? trace_event_raw_event_workqueue_execute_start+0x80/0x80 [ 2791.454215] kthread+0x10e/0x128 [ 2791.454218] ? kthread_create_worker_on_cpu+0x48/0x48 [ 2791.454222] ret_from_fork+0x22/0x40 [ 2791.454226] Code: a8 45 84 d2 75 4b 48 8b 7f 18 89 da 48 8b 07 48 8b 40 08 e8 ef 4a 5d 00 89 d8 48 83 c4 48 5b 41 5a 41 5c 41 5d 5d c3 0f 0b eb c3 <0f> 0b e9 52 ff ff ff 41 8b 0c 24 41 89 c0 49 83 c4 08 45 8b 2c [ 2791.454281] ---[ end trace 9738d66b26317987 ]--- I am on 4.17.8. Machine is Lenovo g50-45 netbook with AMD a6310 APU and R4 Mullins. Kernel was booted with amdgpu.dc=1 and amdgpu.dpm=1 kernel options. I get this warning only with external monitor connected through HDMI. With single eDP screen dmesg is clean, but I haven't observed any other problems for now tough, only this warning mesage.
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