[Nouveau] [Bug 93733] New: Kernel message spam when HDMI display is turned off

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93733

            Bug ID: 93733
           Summary: Kernel message spam when HDMI display is turned off
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: minor
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: i.am.inuyasha at gmail.com
        QA Contact: xorg-team at lists.x.org

Created attachment 121073
  --> https://bugs.freedesktop.org/attachment.cgi?id=121073&action=edit
dmesg output

When using nouveau driver and turning off my HDMI screen, the kernel logs are
spammed with errors:

Jan 16 07:27:36 guilmon kernel: ------------[ cut here ]------------
Jan 16 07:27:36 guilmon kernel: WARNING: CPU: 6 PID: 172 at
include/drm/drm_crtc.h:1577 drm_helper_choose_crtc_dpms+0x93/0xa0
[drm_kms_helper]()
Jan 16 07:27:36 guilmon kernel: Modules linked in: fuse pci_stub vboxpci(O)
vboxnetflt(O) vboxnetadp(O) vboxdrv(O) f71882fg snd_hda_codec_hdmi joydev btusb 
Jan 16 07:27:36 guilmon kernel:  ansi_cprng algif_skcipher af_alg dm_crypt
dm_mod hid_generic usbhid hid sr_mod cdrom sd_mod uas usb_storage atkbd libps2
cr
Jan 16 07:27:36 guilmon kernel: CPU: 6 PID: 172 Comm: kworker/6:3 Tainted: G   
    W  O    4.3.3-2-ARCH #1
Jan 16 07:27:36 guilmon kernel: Hardware name: MSI MS-7693/970A-G46 (MS-7693),
BIOS V1.11 10/31/2012
Jan 16 07:27:36 guilmon kernel: Workqueue: events nvif_notify_work [nouveau]
Jan 16 07:27:36 guilmon kernel:  0000000000000000 00000000d3b82562
ffff8805ff7d3d10 ffffffff812c0dc9
Jan 16 07:27:36 guilmon kernel:  0000000000000000 ffff8805ff7d3d48
ffffffff81074f42 ffff880600bcf000
Jan 16 07:27:36 guilmon kernel:  ffff880600942000 ffff880600942000
0000000000000003 0000000000000000
Jan 16 07:27:36 guilmon kernel: Call Trace:
Jan 16 07:27:36 guilmon kernel:  [<ffffffff812c0dc9>] dump_stack+0x4b/0x72
Jan 16 07:27:36 guilmon kernel:  [<ffffffff81074f42>]
warn_slowpath_common+0x82/0xc0
Jan 16 07:27:36 guilmon kernel:  [<ffffffff8107508a>]
warn_slowpath_null+0x1a/0x20
Jan 16 07:27:36 guilmon kernel:  [<ffffffffa05e11f3>]
drm_helper_choose_crtc_dpms+0x93/0xa0 [drm_kms_helper]
Jan 16 07:27:36 guilmon kernel:  [<ffffffffa05e15c7>]
drm_helper_connector_dpms+0x77/0x100 [drm_kms_helper]
Jan 16 07:27:36 guilmon kernel:  [<ffffffffa0a67700>] ?
nv50_display_crtc_get+0x20/0x20 [nouveau]
Jan 16 07:27:36 guilmon kernel:  [<ffffffffa0a640fb>]
nouveau_connector_hotplug+0x3b/0xb0 [nouveau]
Jan 16 07:27:36 guilmon kernel:  [<ffffffffa09bca77>]
nvif_notify_work+0x27/0xa0 [nouveau]
Jan 16 07:27:36 guilmon kernel:  [<ffffffff8108c9ad>] ?
pwq_dec_nr_in_flight+0x4d/0xa0
Jan 16 07:27:36 guilmon kernel:  [<ffffffff8108cfeb>]
process_one_work+0x14b/0x440
Jan 16 07:27:36 guilmon kernel:  [<ffffffff8108d328>] worker_thread+0x48/0x4a0
Jan 16 07:27:36 guilmon kernel:  [<ffffffff8108d2e0>] ?
process_one_work+0x440/0x440
Jan 16 07:27:36 guilmon kernel:  [<ffffffff81092e68>] kthread+0xd8/0xf0
Jan 16 07:27:36 guilmon kernel:  [<ffffffff81092d90>] ?
kthread_worker_fn+0x170/0x170
Jan 16 07:27:36 guilmon kernel:  [<ffffffff8158409f>] ret_from_fork+0x3f/0x70
Jan 16 07:27:36 guilmon kernel:  [<ffffffff81092d90>] ?
kthread_worker_fn+0x170/0x170
Jan 16 07:27:36 guilmon kernel: ---[ end trace b434083d8b28aa12 ]---

When turning the display back on, the errors stop and things work normally
again.

System:
Nouveau v1.0.12-1
Xorg-server v1.18.0-4
Arch Linux AMD64 on AMD FX-8120, 24GB RAM
EVGA GTX 650 TI Boost, 1 GB, with three screens connected:
-HDMI
-DVI (upper port)
-DisplayPort (via VGA adaptor)

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