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[Sander Jonkers <1420290@xxxxxxxxxxxxxxxxxx>]

FWIW: I searched for "[drm:intel_pipe_update_end [i915]] *ERROR* Atomic
update failure on pipe A (start=76355 end=76356)" and found this source
code on http://lists.freedesktop.org/archives/intel-
gfx/2014-February/040161.html doing the "Atomic update failure on pipe":


115 static void intel_pipe_update_end(struct intel_crtc *crtc, u32 start_vbl_count)
116 {
117         struct drm_device *dev = crtc->base.dev;
118         enum pipe pipe = crtc->pipe;
119         u32 end_vbl_count = dev->driver->get_vblank_counter(dev, pipe);
120 
121         trace_i915_pipe_update_end(crtc, end_vbl_count);
122 
123         local_irq_enable();
124 
125         if (start_vbl_count != end_vbl_count)
126                 DRM_ERROR("Atomic update failure on pipe %c (start=%u end=%u)\n",
127                           pipe_name(pipe), start_vbl_count, end_vbl_count);
128 }

So because start_vbl_count != end_vbl_count I get that message in dmesg.

NB: I'm not sure the message "[drm:intel_pipe_update_end [i915]] *ERROR*
Atomic update failure on pipe A (start=76355 end=76356)" has to do with
the error message 12 seconds later "WARNING: CPU: 0 PID: 0 at
/home/kernel/COD/linux/drivers/gpu/drm/i915/intel_display.c:9698
intel_check_page_flip+0xe6/0xf0 [i915]()"

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https://bugs.launchpad.net/bugs/1420290

Title:
  WARNING: CPU: 0 PID: 2517 at
  /home/kernel/COD/linux/drivers/gpu/drm/i915/intel_display.c:9713
  intel_check_page_flip+0xe6/0xf0 [i915]()

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Running Vivid with kernel 3.19 (debs from http://kernel.ubuntu.com
  /~kernel-ppa/mainline/v3.19-vivid/), I get the warning below in dmesg.

  I can't use "ubuntu-bug linux" because I get "It appears you are
  currently running a mainline kernel.  It would be better to report
  this bug upstream at http://bugzilla.kernel.org/ so that the upstream
  kernel developers are aware of the issue.  If you'd still like to file
  a bug against the Ubuntu kernel, please boot with an official Ubuntu
  kernel and re-file.". IMHO that last advice would be a DTO (Defeating
  The Objective), as this message does not appear in the 3.18.

  
  $ uname -a
  Linux superstreamer 3.19.0-031900-generic #201502091451 SMP Mon Feb 9 14:52:52 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

  
  [ 2243.390997] ------------[ cut here ]------------
  [ 2243.391046] WARNING: CPU: 0 PID: 2517 at /home/kernel/COD/linux/drivers/gpu/drm/i915/intel_display.c:9713 intel_check_page_flip+0xe6/0xf0 [i915]()
  [ 2243.391049] Kicking stuck page flip: queued at 134027, now 134031
  [ 2243.391051] Modules linked in: hid_generic(E) hp_wmi(E) sparse_keymap(E) joydev(E) rfcomm(E) bnep(E) intel_rapl(E) intel_soc_dts_thermal(E) intel_powerclamp(E) snd_hda_codec_hdmi(E) coretemp(E) kvm_intel(E) snd_hda_codec_realtek(E) kvm(E) snd_hda_codec_generic(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) cryptd(E) arc4(E) rtl8723be(E) btcoexist(E) snd_hda_intel(E) usbhid(E) rtl8723_common(E) snd_hda_controller(E) rtl_pci(E) serio_raw(E) rtlwifi(E) snd_hda_codec(E) snd_intel_sst_acpi(E) nls_iso8859_1(E) snd_hwdep(E) snd_intel_sst_core(E) snd_soc_sst_mfld_platform(E) mac80211(E) rtsx_pci_ms(E) snd_seq_midi(E) memstick(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_seq_midi_event(E) cfg80211(E) lpc_ich(E) i915(E) snd_soc_core(E) snd_rawmidi(E) snd_compress(E) wmi(E) hp_wireless(E) snd_pcm_dmaengine(E)
  [ 2243.391089]  snd_seq(E) dw_dmac(E) dw_dmac_core(E) int3400_thermal(E) snd_seq_device(E) snd_pcm(E) int3403_thermal(E) processor_thermal_device(E) acpi_thermal_rel(E) intel_smartconnect(E) video(E) drm_kms_helper(E) drm(E) i2c_hid(E) snd_timer(E) hid(E) snd(E) i2c_designware_platform(E) soundcore(E) i2c_designware_core(E) i2c_algo_bit(E) shpchp(E) parport_pc(E) snd_soc_sst_acpi(E) btusb(E) mei_txe(E) mei(E) rfkill_gpio(E) iosf_mbi(E) ppdev(E) spi_pxa2xx_platform(E) bluetooth(E) 8250_dw(E) pwm_lpss_platform(E) pwm_lpss(E) lp(E) parport(E) mac_hid(E) mmc_block(E) rtsx_pci_sdmmc(E) psmouse(E) rtsx_pci(E) sdhci_acpi(E) sdhci(E)
  [ 2243.391129] CPU: 0 PID: 2517 Comm: Chrome_IOThread Tainted: G            E  3.19.0-031900-generic #201502091451
  [ 2243.391131] Hardware name: Hewlett-Packard HP Stream Notebook PC 13/802A, BIOS F.05 11/28/2014
  [ 2243.391134]  00000000000025f1 ffff880076c03630 ffffffff817c4c00 0000000000000007
  [ 2243.391138]  ffff880076c03680 ffff880076c03670 ffffffff81076e87 0748a000000008c1
  [ 2243.391142]  ffff880036b91000 ffff8800700909a8 ffff880070090800 0000000000000000
  [ 2243.391146] Call Trace:
  [ 2243.391149]  <IRQ>  [<ffffffff817c4c00>] dump_stack+0x45/0x57
  [ 2243.391162]  [<ffffffff81076e87>] warn_slowpath_common+0x97/0xe0
  [ 2243.391166]  [<ffffffff81076f86>] warn_slowpath_fmt+0x46/0x50
  [ 2243.391192]  [<ffffffffc04408a6>] intel_check_page_flip+0xe6/0xf0 [i915]
  [ 2243.391214]  [<ffffffffc0405628>] valleyview_pipestat_irq_handler+0x188/0x220 [i915]
  [ 2243.391236]  [<ffffffffc040bd2f>] valleyview_irq_handler+0xaf/0x180 [i915]
  [ 2243.391242]  [<ffffffff8175d745>] ? ip6_finish_output+0x95/0xd0
  [ 2243.391247]  [<ffffffff810ce4cd>] handle_irq_event_percpu+0x5d/0x1e0
  [ 2243.391251]  [<ffffffff8175b18a>] ? ip6_xmit+0x22a/0x490
  [ 2243.391255]  [<ffffffff810ce698>] handle_irq_event+0x48/0x70
  [ 2243.391258]  [<ffffffff810d171f>] handle_edge_irq+0x7f/0x120
  [ 2243.391263]  [<ffffffff810178a2>] handle_irq+0x22/0x40
  [ 2243.391267]  [<ffffffff817d4e4c>] do_IRQ+0x5c/0x110
  [ 2243.391271]  [<ffffffff817d2cad>] common_interrupt+0x6d/0x6d
  [ 2243.391276]  [<ffffffff81703921>] ? tcp_queue_rcv+0x21/0x130
  [ 2243.391280]  [<ffffffff816a7ac2>] ? __skb_checksum_complete+0x22/0xd0
  [ 2243.391284]  [<ffffffff81708b54>] tcp_rcv_established+0x194/0x740
  [ 2243.391289]  [<ffffffff81786126>] tcp_v6_do_rcv+0x216/0x450
  [ 2243.391294]  [<ffffffff81312226>] ? security_sock_rcv_skb+0x16/0x20
  [ 2243.391298]  [<ffffffff817872c6>] tcp_v6_rcv+0x796/0x7e0
  [ 2243.391304]  [<ffffffffc073523f>] ? _rtl_pci_rx_interrupt+0x4af/0x680 [rtl_pci]
  [ 2243.391309]  [<ffffffff8175da20>] ip6_input_finish+0x140/0x420
  [ 2243.391313]  [<ffffffff8175e202>] ip6_input+0x22/0x60
  [ 2243.391317]  [<ffffffff81784f58>] ? tcp_v6_early_demux+0x58/0x70
  [ 2243.391321]  [<ffffffff8175d8a8>] ip6_rcv_finish+0x78/0xb0
  [ 2243.391324]  [<ffffffff8175dff7>] ipv6_rcv+0x2f7/0x4e0
  [ 2243.391329]  [<ffffffff816b3c63>] __netif_receive_skb_core+0x513/0x670
  [ 2243.391332]  [<ffffffff816b3de1>] __netif_receive_skb+0x21/0x70
  [ 2243.391336]  [<ffffffff816b3fa3>] netif_receive_skb_internal+0x23/0x90
  [ 2243.391339]  [<ffffffff816b403d>] netif_receive_skb+0x2d/0x80
  [ 2243.391364]  [<ffffffffc061a113>] ieee80211_deliver_skb+0x133/0x250 [mac80211]
  [ 2243.391381]  [<ffffffffc061b8d8>] ieee80211_rx_h_data+0x1a8/0x2b0 [mac80211]
  [ 2243.391399]  [<ffffffffc061cea5>] ieee80211_rx_handlers+0x115/0x1e0 [mac80211]
  [ 2243.391416]  [<ffffffffc061d04f>] ieee80211_prepare_and_rx_handle+0xdf/0x130 [mac80211]
  [ 2243.391420]  [<ffffffff817d4e55>] ? do_IRQ+0x65/0x110
  [ 2243.391437]  [<ffffffffc061d257>] __ieee80211_rx_handle_packet+0x1b7/0x360 [mac80211]
  [ 2243.391441]  [<ffffffff817d2cad>] ? common_interrupt+0x6d/0x6d
  [ 2243.391459]  [<ffffffffc061d515>] ieee80211_rx+0x115/0x240 [mac80211]
  [ 2243.391473]  [<ffffffffc05f6324>] ieee80211_tasklet_handler+0xd4/0xe0 [mac80211]
  [ 2243.391477]  [<ffffffff8107b307>] tasklet_action+0xc7/0xe0
  [ 2243.391480]  [<ffffffff8107ac9e>] __do_softirq+0xde/0x2d0
  [ 2243.391484]  [<ffffffff8107b0ae>] irq_exit+0x7e/0xa0
  [ 2243.391488]  [<ffffffff817d4e55>] do_IRQ+0x65/0x110
  [ 2243.391491]  [<ffffffff817d2cad>] common_interrupt+0x6d/0x6d
  [ 2243.391493]  <EOI>  [<ffffffff817d1f2d>] ? system_call_fastpath+0x16/0x1b
  [ 2243.391499] ---[ end trace 88263cf4c37bf81b ]---

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