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[Bug 1523088]

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: Kman <1523088@xxxxxxxxxxxxxxxxxx>
Date: Sat, 07 May 2016 18:24:56 -0000
Reply-to: Bug 1523088 <1523088@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Been getting this in Fedora 23 (+ testing) 64-bit ever since upgrading
the hardware.

A desktop system, Intel i7 6700, built-in video, two monitors (HDMI +
DVI).

The current kernel is:

Linux fiona 4.4.9-300.fc23.x86_64 #1 SMP Wed May 4 23:56:27 UTC 2016
x86_64 x86_64 x86_64 GNU/Linux

[    1.756194] ------------[ cut here ]------------
[    1.756271] WARNING: CPU: 0 PID: 135 at drivers/gpu/drm/i915/intel_pm.c:3601 skl_update_other_pipe_wm+0x1de/0x1f0 [i915]()
[    1.756273] WARN_ON(!wm_changed)
[    1.756285] Modules linked in: i915 e1000e i2c_algo_bit drm_kms_helper uas ptp serio_raw usb_storage pps_core drm nvme video i2c_hid fjes
[    1.756290] CPU: 0 PID: 135 Comm: kworker/u16:3 Not tainted 4.4.9-300.fc23.x86_64 #1
[    1.756292] Hardware name: System manufacturer System Product Name/Z170-A, BIOS 1702 01/28/2016
[    1.756300] Workqueue: events_unbound async_run_entry_fn
[    1.756305]  0000000000000286 000000007d583ed3 ffff88045e1174b0 ffffffff813b62ee
[    1.756308]  ffff88045e1174f8 ffffffffa0220bf8 ffff88045e1174e8 ffffffff810a4252
[    1.756311]  ffff88045e11761c ffff88045ba81000 ffff88045ba80000 0000000000000000
[    1.756312] Call Trace:
[    1.756322]  [<ffffffff813b62ee>] dump_stack+0x63/0x85
[    1.756329]  [<ffffffff810a4252>] warn_slowpath_common+0x82/0xc0
[    1.756333]  [<ffffffff810a42ec>] warn_slowpath_fmt+0x5c/0x80
[    1.756393]  [<ffffffffa015bd6e>] skl_update_other_pipe_wm+0x1de/0x1f0 [i915]
[    1.756448]  [<ffffffffa015bfd2>] skl_update_wm+0x252/0x750 [i915]
[    1.756501]  [<ffffffffa01604de>] intel_update_watermarks+0x1e/0x30 [i915]
[    1.756581]  [<ffffffffa01c8b80>] haswell_crtc_enable+0x370/0x870 [i915]
[    1.756656]  [<ffffffffa01c4712>] intel_atomic_commit+0x492/0x1420 [i915]
[    1.756694]  [<ffffffffa00621ae>] ? drm_atomic_check_only+0x18e/0x590 [drm]
[    1.756727]  [<ffffffffa00625e7>] drm_atomic_commit+0x37/0x60 [drm]
[    1.756742]  [<ffffffffa00f21af>] restore_fbdev_mode+0x22f/0x260 [drm_kms_helper]
[    1.756756]  [<ffffffffa00f4383>] drm_fb_helper_restore_fbdev_mode_unlocked+0x33/0x80 [drm_kms_helper]
[    1.756767]  [<ffffffffa00f43fd>] drm_fb_helper_set_par+0x2d/0x50 [drm_kms_helper]
[    1.756847]  [<ffffffffa01db39a>] intel_fbdev_set_par+0x1a/0x60 [i915]
[    1.756853]  [<ffffffff814283c0>] fbcon_init+0x570/0x5f0
[    1.756858]  [<ffffffff814a9eca>] visual_init+0xca/0x130
[    1.756861]  [<ffffffff814abd61>] do_bind_con_driver+0x1c1/0x3a0
[    1.756865]  [<ffffffff814ac279>] do_take_over_console+0x149/0x1a0
[    1.756870]  [<ffffffff81424227>] do_fbcon_takeover+0x57/0xb0
[    1.756874]  [<ffffffff81428e38>] fbcon_event_notify+0x658/0x750
[    1.756878]  [<ffffffff810c369a>] notifier_call_chain+0x4a/0x70
[    1.756882]  [<ffffffff810c39d7>] __blocking_notifier_call_chain+0x47/0x60
[    1.756885]  [<ffffffff810c3a06>] blocking_notifier_call_chain+0x16/0x20
[    1.756890]  [<ffffffff8142ea8b>] fb_notifier_call_chain+0x1b/0x20
[    1.756896]  [<ffffffff81430daf>] register_framebuffer+0x20f/0x350
[    1.756909]  [<ffffffffa00f46aa>] drm_fb_helper_initial_config+0x28a/0x410 [drm_kms_helper]
[    1.756978]  [<ffffffffa01dbe9b>] intel_fbdev_initial_config+0x1b/0x20 [i915]
[    1.756984]  [<ffffffff810c510a>] async_run_entry_fn+0x4a/0x140
[    1.756988]  [<ffffffff810bc709>] process_one_work+0x159/0x430
[    1.756993]  [<ffffffff810bca2e>] worker_thread+0x4e/0x450
[    1.756997]  [<ffffffff810bc9e0>] ? process_one_work+0x430/0x430
[    1.757000]  [<ffffffff810c27b8>] kthread+0xd8/0xf0
[    1.757003]  [<ffffffff810c26e0>] ? kthread_worker_fn+0x160/0x160
[    1.757008]  [<ffffffff817a128f>] ret_from_fork+0x3f/0x70
[    1.757011]  [<ffffffff810c26e0>] ? kthread_worker_fn+0x160/0x160
[    1.757041] ---[ end trace fafafc83ac3f9b24 ]---

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https://bugs.launchpad.net/bugs/1523088

Title:
  WARN_ON(!wm_changed) warning and stacktrace in kernel log

Status in X.Org X server:
  Confirmed
Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I always get an warning and stacktrace (and it seems to hang a little
  bit). This occurs after reboot as well as when I move with the cursor
  between my hdmi monitor and my laptop. (This only occurs when HDMI is
  connected)

  Default Kubuntu install version 15.10 with kernel 4.2.0-19-generic
  Processor: i5 6300hq
  Graphics: gtx950m

  WARNING: CPU: 1 PID: 827 at /build/linux-26_gwp/linux-4.2.0/drivers/gpu/drm/i915/intel_pm.c:3404 skl_update_other_pipe_wm+0x1de/0x1f0 [i915]()
  [Sam Dez  5 12:34:46 2015] WARN_ON(!wm_changed)
  [Sam Dez  5 12:34:46 2015] Modules linked in:
  [Sam Dez  5 12:34:46 2015]  nls_iso8859_1 pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) drbg ansi_cprng ctr ccm rfcomm bnep arc4 rtsx_usb_ms memstick i2c_designware_platform i2c_designware_core acer_wmi sparse_keymap snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core intel_rapl snd_hwdep iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul snd_seq_device glue_helper snd_timer ablk_helper cryptd ath10k_pci ath10k_core snd ath mac80211 serio_raw soundcore idma64 virt_dma cfg80211 joydev input_leds uvcvideo mei_me videobuf2_vmalloc videobuf2_memops mei videobuf2_core v4l2_common intel_lpss_pci videodev media
  [Sam Dez  5 12:34:46 2015]  btusb btrtl btbcm btintel bluetooth shpchp dell_smo8800 intel_lpss_acpi intel_lpss tpm_crb acpi_pad mac_hid parport_pc ppdev lp parport autofs4 hid_generic hid_logitech_hidpp hid_logitech_dj usbhid rtsx_usb_sdmmc rtsx_usb uas usb_storage nouveau i915 mxm_wmi ttm i2c_algo_bit drm_kms_helper r8169 mii drm ahci libahci i2c_hid hid wmi pinctrl_sunrisepoint video pinctrl_intel
  [Sam Dez  5 12:34:46 2015] CPU: 1 PID: 827 Comm: Xorg Tainted: G        W  OE   4.2.0-19-generic #23-Ubuntu
  [Sam Dez  5 12:34:46 2015] Hardware name: Acer Aspire V5-591G/Usopp_SLS, BIOS V1.03 10/23/2015
  [Sam Dez  5 12:34:46 2015]  0000000000000000 00000000a287b8f0 ffff880071b03518 ffffffff817e93f9
  [Sam Dez  5 12:34:46 2015]  0000000000000000 ffff880071b03570 ffff880071b03558 ffffffff8107b3d6
  [Sam Dez  5 12:34:46 2015]  ffff880071b03620 ffff880071b036c4 ffff880279bf2000 ffff880279bf7000
  [Sam Dez  5 12:34:46 2015] Call Trace:
  [Sam Dez  5 12:34:46 2015]  [<ffffffff817e93f9>] dump_stack+0x45/0x57
  [Sam Dez  5 12:34:46 2015]  [<ffffffff8107b3d6>] warn_slowpath_common+0x86/0xc0
  [Sam Dez  5 12:34:46 2015]  [<ffffffff8107b465>] warn_slowpath_fmt+0x55/0x70
  [Sam Dez  5 12:34:46 2015]  [<ffffffffc017eb9e>] skl_update_other_pipe_wm+0x1de/0x1f0 [i915]
  [Sam Dez  5 12:34:46 2015]  [<ffffffffc017ed6b>] skl_update_wm+0x1bb/0x740 [i915]
  [Sam Dez  5 12:34:46 2015]  [<ffffffffc01ca837>] ? gen9_read32+0xf7/0x2d0 [i915]
  [Sam Dez  5 12:34:46 2015]  [<ffffffffc01b32a2>] ? i915_get_vblank_timestamp+0x62/0xa0 [i915]
  [Sam Dez  5 12:34:46 2015]  [<ffffffffc01824be>] intel_update_watermarks+0x1e/0x30 [i915]
  [Sam Dez  5 12:34:46 2015]  [<ffffffffc01e5ad9>] intel_finish_crtc_commit+0x169/0x190 [i915]
  [Sam Dez  5 12:34:46 2015]  [<ffffffffc00f3793>] drm_atomic_helper_commit_planes_on_crtc+0x143/0x260 [drm_kms_helper]
  [Sam Dez  5 12:34:46 2015]  [<ffffffffc01fee3b>] intel_atomic_commit+0x6b/0x100 [i915]
  [Sam Dez  5 12:34:46 2015]  [<ffffffffc0094d47>] drm_atomic_commit+0x37/0x60 [drm]
  [Sam Dez  5 12:34:46 2015]  [<ffffffffc00f20cf>] drm_atomic_helper_disable_plane+0xef/0x130 [drm_kms_helper]
  [Sam Dez  5 12:34:46 2015]  [<ffffffffc008493a>] __setplane_internal+0x23a/0x2f0 [drm]
  [Sam Dez  5 12:34:46 2015]  [<ffffffffc0084b1b>] drm_mode_cursor_universal+0x12b/0x210 [drm]
  [Sam Dez  5 12:34:46 2015]  [<ffffffff817edf2f>] ? __ww_mutex_lock+0x5f/0xa0
  [Sam Dez  5 12:34:46 2015]  [<ffffffffc0084c81>] drm_mode_cursor_common+0x81/0x180 [drm]
  [Sam Dez  5 12:34:46 2015]  [<ffffffffc0088ca0>] drm_mode_cursor_ioctl+0x50/0x70 [drm]
  [Sam Dez  5 12:34:46 2015]  [<ffffffffc0079495>] drm_ioctl+0x125/0x610 [drm]
  [Sam Dez  5 12:34:46 2015]  [<ffffffffc0088c50>] ? drm_mode_setcrtc+0x500/0x500 [drm]
  [Sam Dez  5 12:34:46 2015]  [<ffffffff81210a25>] do_vfs_ioctl+0x295/0x480
  [Sam Dez  5 12:34:46 2015]  [<ffffffff81087f71>] ? __set_task_blocked+0x41/0xa0
  [Sam Dez  5 12:34:46 2015]  [<ffffffff81210c89>] SyS_ioctl+0x79/0x90
  [Sam Dez  5 12:34:46 2015]  [<ffffffff817f01f2>] entry_SYSCALL_64_fastpath+0x16/0x75
  [Sam Dez  5 12:34:46 2015] ---[ end trace c72c2dc92b88cd01 ]---

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: xserver-xorg-core 2:1.17.2-1ubuntu9.1
  ProcVersionSignature: Ubuntu 4.2.0-19.23-generic 4.2.6
  Uname: Linux 4.2.0-19-generic x86_64
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  Date: Sat Dec  5 12:35:24 2015
  ExecutablePath: /usr/bin/Xorg
  InstallationDate: Installed on 2015-12-04 (0 days ago)
  InstallationMedia: Kubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
  SourcePackage: xorg-server
  UpgradeStatus: No upgrade log present (probably fresh install)

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