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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Boot error: gpu/drm/amd/amdgpu/../display/dc/dm_services.h:132 generic_reg_update_ex+0x108/0x150 [amdgpu] dce110_stream_encoder_update_hdmi_info_packets+0x20e/0x3a0 [amdgpu]"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=106544#c9">Comment # 9</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Boot error: gpu/drm/amd/amdgpu/../display/dc/dm_services.h:132 generic_reg_update_ex+0x108/0x150 [amdgpu] dce110_stream_encoder_update_hdmi_info_packets+0x20e/0x3a0 [amdgpu]"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=106544">bug 106544</a>
              from <span class="vcard"><a class="email" href="mailto:soprwa@gmail.com" title="Przemek <soprwa@gmail.com>"> <span class="fn">Przemek</span></a>
</span></b>
        <pre>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.</pre>
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