FWIW: 12 seconds before the described problem, there is this line in dmesg:
[drm:intel_pipe_update_end [i915]] *ERROR* Atomic update failure on pipe A (start=76355 end=76356) which I can't find on Google. More from dmesg: $ dmesg | grep "Linux version" [ 0.000000] Linux version 3.19.0-994-generic (kernel@gomeisa) (gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) ) #201502112105 SMP Thu Feb 12 02:06:42 UTC 2015 $ dmesg --level=err [ 0.038140] Ignoring BGRT: invalid status 0 (expected 1) [ 6.988640] ACPI PCC probe failed. [ 25.409944] systemd-logind[1530]: Failed to start user service: Unknown unit: user@108.service [ 29.503860] systemd-logind[1530]: Failed to start user service: Unknown unit: user@1000.service [ 2328.943941] [drm:intel_pipe_update_end [i915]] *ERROR* Atomic update failure on pipe A (start=76355 end=76356) The Intel GPU part: [ 2328.943941] [drm:intel_pipe_update_end [i915]] *ERROR* Atomic update failure on pipe A (start=76355 end=76356) [ 2342.508179] ------------[ cut here ]------------ [ 2342.508239] 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]() [ 2342.508243] Kicking stuck page flip: queued at 122851, now 122856 [ 2342.508246] Modules linked in: ctr ccm bnep rfcomm nls_iso8859_1 hid_generic usbhid btusb bluetooth hp_wmi sparse_keymap joydev intel_rapl arc4 intel_soc_dts_thermal rtl8723be intel_powerclamp btcoexist coretemp rtl8723_common kvm_intel uvcvideo rtl_pci rtlwifi videobuf2_vmalloc kvm mac80211 videobuf2_memops videobuf2_core crct10dif_pclmul crc32_pclmul ghash_clmulni_intel v4l2_common snd_hda_codec_hdmi videodev cryptd media snd_hda_codec_realtek snd_hda_codec_generic cfg80211 snd_intel_sst_acpi snd_intel_sst_core snd_soc_rt5640 snd_soc_rl6231 snd_soc_sst_mfld_platform i915 snd_hda_intel snd_soc_core rtsx_pci_ms snd_hda_controller memstick snd_hda_codec snd_compress snd_pcm_dmaengine snd_hwdep serio_raw snd_pcm drm_kms_helper shpchp drm mei_txe mei snd_seq_midi lpc_ich snd_seq_midi_event i2c_algo_bit [ 2342.508317] iosf_mbi snd_rawmidi wmi snd_seq dw_dmac video snd_seq_device dw_dmac_core snd_timer hp_wireless int3400_thermal parport_pc intel_smartconnect int3403_thermal processor_thermal_device acpi_thermal_rel ppdev snd i2c_hid rfkill_gpio hid soundcore lp i2c_designware_platform pwm_lpss_platform snd_soc_sst_acpi 8250_dw mac_hid parport i2c_designware_core pwm_lpss spi_pxa2xx_platform mmc_block rtsx_pci_sdmmc psmouse rtsx_pci sdhci_acpi sdhci [ 2342.508365] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.19.0-994-generic #201502112105 [ 2342.508368] Hardware name: Hewlett-Packard HP Stream Notebook PC 13/802A, BIOS F.05 11/28/2014 [ 2342.508372] 00000000000025e2 ffff880076c03d08 ffffffff817c5530 0000000000000007 [ 2342.508378] ffff880076c03d58 ffff880076c03d48 ffffffff81076e87 0000000000000924 [ 2342.508384] ffff880077d79000 ffff880079b729a8 ffff880079b72800 0000000000000000 [ 2342.508390] Call Trace: [ 2342.508394] <IRQ> [<ffffffff817c5530>] dump_stack+0x45/0x57 [ 2342.508412] [<ffffffff81076e87>] warn_slowpath_common+0x97/0xe0 [ 2342.508418] [<ffffffff81076f86>] warn_slowpath_fmt+0x46/0x50 [ 2342.508458] [<ffffffffc0752086>] intel_check_page_flip+0xe6/0xf0 [i915] [ 2342.508492] [<ffffffffc0714388>] valleyview_pipestat_irq_handler+0x188/0x220 [i915] [ 2342.508526] [<ffffffffc071ab1f>] valleyview_irq_handler+0xaf/0x180 [i915] [ 2342.508534] [<ffffffff810ce4cd>] handle_irq_event_percpu+0x5d/0x1e0 [ 2342.508540] [<ffffffff810ce698>] handle_irq_event+0x48/0x70 [ 2342.508546] [<ffffffff810d171f>] handle_edge_irq+0x7f/0x120 [ 2342.508552] [<ffffffff810178a2>] handle_irq+0x22/0x40 [ 2342.508559] [<ffffffff817d578c>] do_IRQ+0x5c/0x110 [ 2342.508565] [<ffffffff817d35ed>] common_interrupt+0x6d/0x6d [ 2342.508568] <EOI> [<ffffffff810d7575>] ? rcu_nocb_kthread+0xf5/0x190 [ 2342.508580] [<ffffffff8165a9b4>] ? cpuidle_enter_state+0x74/0x190 [ 2342.508586] [<ffffffff8165a99f>] ? cpuidle_enter_state+0x5f/0x190 [ 2342.508592] [<ffffffff8165ab97>] cpuidle_enter+0x17/0x20 [ 2342.508599] [<ffffffff810b79c1>] cpuidle_idle_call+0x101/0x1c0 [ 2342.508605] [<ffffffff810b7c55>] cpu_idle_loop+0x1d5/0x1f0 [ 2342.508613] [<ffffffff81d3a120>] ? early_idt_handlers+0x120/0x120 [ 2342.508618] [<ffffffff810b7cca>] cpu_startup_entry+0x5a/0x60 [ 2342.508625] [<ffffffff817ad277>] rest_init+0x77/0x80 [ 2342.508631] [<ffffffff81d3b124>] start_kernel+0x3e9/0x3f0 [ 2342.508637] [<ffffffff81d3abcd>] ? set_init_arg+0x56/0x56 [ 2342.508643] [<ffffffff817b3dc6>] ? memblock_reserve+0x4c/0x51 [ 2342.508649] [<ffffffff81d3a5f8>] x86_64_start_reservations+0x2a/0x2c [ 2342.508655] [<ffffffff81d3a73e>] x86_64_start_kernel+0x144/0x153 [ 2342.508659] ---[ end trace f62bf170971b3c29 ]--- -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. 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]() To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1420290/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
