[Bug 98214] drm/i915: WARN_ON_ONCE(!crtc_clock || cdclk < crtc_clock)

Tue Oct 25 03:35:45 UTC 2016

https://bugs.freedesktop.org/show_bug.cgi?id=98214

--- Comment #6 from Joseph Yasi <joe.yasi at gmail.com> ---
I am also seeing this same issue on an i7-6700K desktop after upgrading to
v4.8. I never saw the issue in the 4.7.y series. It coincides with the screen
going black for about a second and returning.

[Mon Oct 24 20:39:53 2016] ------------[ cut here ]------------
[Mon Oct 24 20:39:53 2016] WARNING: CPU: 7 PID: 1731 at
drivers/gpu/drm/i915/intel_display.c:14178 skl_max_scale.part.123+0x64/0x70
[i915]
[Mon Oct 24 20:39:53 2016] WARN_ON_ONCE(!crtc_clock || cdclk < crtc_clock)
[Mon Oct 24 20:39:53 2016] Modules linked in:
[Mon Oct 24 20:39:53 2016]  rfcomm pci_stub vboxpci(O) vboxnetadp(O)
vboxnetflt(O) vboxdrv(O) bnep binfmt_misc vfat fat snd_hda_codec_hdmi uvcvideo
videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core videodev
snd_usb_audio snd_hda_codec_realtek snd_usbmidi_lib media snd_hda_codec_generic
intel_rapl x86_pkg_temp_thermal intel_powerclamp crct10dif_pclmul crc32_pclmul
crc32c_intel ghash_clmulni_intel input_leds aesni_intel aes_x86_64 lrw
glue_helper ablk_helper cryptd intel_cstate intel_rapl_perf snd_hda_intel
snd_hda_codec snd_hwdep snd_hda_core snd_pcm_oss efi_pstore snd_mixer_oss btusb
btrtl btbcm snd_pcm btintel bluetooth snd_seq_oss snd_seq_midi efivars
snd_rawmidi snd_seq_midi_event snd_seq snd_seq_device snd_timer snd soundcore
wl(PO) cfg80211 rfkill battery intel_lpss_acpi intel_lpss mfd_core
[Mon Oct 24 20:39:53 2016]  acpi_pad tpm_tis acpi_als tpm_tis_core kfifo_buf
tpm industrialio sg coretemp loop nfsd auth_rpcgss oid_registry nfs_acl lockd
grace sunrpc efivarfs ipv6 crc_ccitt hid_generic usbhid uas usb_storage mxm_wmi
igb bcache dca i915 e1000e psmouse intel_gtt ptp xhci_pci drm_kms_helper
pps_core syscopyarea hwmon sysfillrect sysimgblt xhci_hcd fb_sys_fops
i2c_algo_bit drm sr_mod usbcore cdrom i2c_core usb_common fan thermal wmi
pinctrl_sunrisepoint video pinctrl_intel button
[Mon Oct 24 20:39:53 2016] CPU: 7 PID: 1731 Comm: Xorg Tainted: P           O  
 4.8.4-customskl #1
[Mon Oct 24 20:39:53 2016] Hardware name: System manufacturer System Product
Name/Z170-DELUXE, BIOS 2202 09/19/2016
[Mon Oct 24 20:39:53 2016]  0000000000000000 ffffffffb235b4ad ffff8f149fd8f9e0
0000000000000000
[Mon Oct 24 20:39:53 2016]  ffffffffb204b194 ffff8f13df140300 ffff8f149fd8fa30
ffff8f14b7426000
[Mon Oct 24 20:39:53 2016]  ffff8f13df140300 ffff8f14b343f400 ffffffffc06e2aa0
ffffffffb204b1fa
[Mon Oct 24 20:39:53 2016] Call Trace:
[Mon Oct 24 20:39:53 2016]  [<ffffffffb235b4ad>] ? dump_stack+0x46/0x59
[Mon Oct 24 20:39:53 2016]  [<ffffffffb204b194>] ? __warn+0xb4/0xd0
[Mon Oct 24 20:39:53 2016]  [<ffffffffb204b1fa>] ? warn_slowpath_fmt+0x4a/0x50
[Mon Oct 24 20:39:53 2016]  [<ffffffffb210a3fd>] ? kmemdup+0x2d/0x40
[Mon Oct 24 20:39:53 2016]  [<ffffffffc05b26b7>] ?
drm_atomic_helper_normalize_zpos+0x237/0x2d0 [drm_kms_helper]
[Mon Oct 24 20:39:53 2016]  [<ffffffffc068b584>] ?
skl_max_scale.part.123+0x64/0x70 [i915]
[Mon Oct 24 20:39:53 2016]  [<ffffffffc068b64b>] ?
intel_check_primary_plane+0xbb/0xd0 [i915]
[Mon Oct 24 20:39:53 2016]  [<ffffffffc05b26b7>] ?
drm_atomic_helper_normalize_zpos+0x237/0x2d0 [drm_kms_helper]
[Mon Oct 24 20:39:53 2016]  [<ffffffffc067d715>] ?
intel_plane_atomic_check+0x125/0x1c0 [i915]
[Mon Oct 24 20:39:53 2016]  [<ffffffffc05af8d7>] ?
drm_atomic_helper_check_planes+0x77/0x1d0 [drm_kms_helper]
[Mon Oct 24 20:39:53 2016]  [<ffffffffc0696988>] ?
intel_atomic_check+0xa58/0x11a0 [i915]
[Mon Oct 24 20:39:53 2016]  [<ffffffffc04c7adc>] ?
drm_atomic_check_only+0x17c/0x600 [drm]
[Mon Oct 24 20:39:53 2016]  [<ffffffffc04c7f6d>] ? drm_atomic_commit+0xd/0x50
[drm]
[Mon Oct 24 20:39:53 2016]  [<ffffffffc05b1941>] ?
drm_atomic_helper_disable_plane+0xa1/0xe0 [drm_kms_helper]
[Mon Oct 24 20:39:53 2016]  [<ffffffffc04b8361>] ?
__setplane_internal+0x171/0x270 [drm]
[Mon Oct 24 20:39:53 2016]  [<ffffffffc04b8572>] ?
drm_mode_cursor_universal+0x112/0x1f0 [drm]
[Mon Oct 24 20:39:53 2016]  [<ffffffffc04b86c6>] ?
drm_mode_cursor_common+0x76/0x170 [drm]
[Mon Oct 24 20:39:53 2016]  [<ffffffffc04bc82f>] ?
drm_mode_cursor_ioctl+0x3f/0x50 [drm]
[Mon Oct 24 20:39:53 2016]  [<ffffffffc04b03a7>] ? drm_ioctl+0x197/0x430 [drm]
[Mon Oct 24 20:39:53 2016]  [<ffffffffc04bc7f0>] ? drm_mode_setcrtc+0x510/0x510
[drm]
[Mon Oct 24 20:39:53 2016]  [<ffffffffb20161be>] ? do_signal+0x17e/0x670
[Mon Oct 24 20:39:53 2016]  [<ffffffffb211a854>] ? handle_mm_fault+0x774/0xf20
[Mon Oct 24 20:39:53 2016]  [<ffffffffb216b1ca>] ? do_vfs_ioctl+0x8a/0x5b0
[Mon Oct 24 20:39:53 2016]  [<ffffffffb217531b>] ? __fget+0x6b/0xb0
[Mon Oct 24 20:39:53 2016]  [<ffffffffb216b75f>] ? SyS_ioctl+0x6f/0x80
[Mon Oct 24 20:39:53 2016]  [<ffffffffb25ff41f>] ?
entry_SYSCALL_64_fastpath+0x17/0x93
[Mon Oct 24 20:39:53 2016] ---[ end trace f134d3732f849a88 ]---
[Mon Oct 24 20:39:54 2016] [drm:gen8_irq_handler [i915]] *ERROR* CPU pipe A
FIFO underrun

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