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[Gurvinder Dadyala <1406982@xxxxxxxxxxxxxxxxxx>]

Kernel 3.18.1-031801-generic from mainline seems to have fixed the
issue, System did not crash or screen display did not go off while
playing videos.

Regards Gurvinder

** Tags added: kernel-fixed-upstream kernel-fixed-
upstream-3.18.1-031801-generic

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https://bugs.launchpad.net/bugs/1406982

Title:
  WARNING: CPU: 1 PID: 1253 at
  /build/buildd/linux-3.13.0/drivers/gpu/drm/i915/intel_display.c:9237
  intel_modeset_check_state+0x62d/0x780 [i915]

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Hi there, I am also facing the same issue. I have Dell Inspiron 1525 running 14.04.1 LTS and kernel version 3.13.0-43-generic.
  System becomes unusable completly and screen goes off as well. Following is what i have found in dmesg

  [  144.446687] WARNING: CPU: 1 PID: 1253 at /build/buildd/linux-3.13.0/drivers/gpu/drm/i915/intel_display.c:9237 intel_modeset_check_state+0x62d/0x780 [i915]()
  [  144.446690] encoder's hw state doesn't match sw tracking (expected 0, found 1)
  [  144.446691] Modules linked in: cdc_ether usbnet mii usb_storage ctr ccm bnep rfcomm bluetooth snd_hda_codec_idt snd_hda_codec_hdmi uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core videodev gpio_ich dell_wmi sparse_keymap dell_laptop dcdbas snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_page_alloc snd_seq_midi snd_seq_midi_event dm_multipath scsi_dh snd_rawmidi coretemp snd_seq joydev serio_raw arc4 r852 sm_common nand nand_ecc nand_bch bch r592 nand_ids mtd memstick iwl3945 snd_seq_device iwlegacy mac80211 snd_timer snd cfg80211 lpc_ich i915 drm_kms_helper soundcore drm i2c_algo_bit mac_hid wmi video parport_pc ppdev lp parport hid_generic usbhid hid firewire_ohci psmouse sdhci_pci sdhci ahci firewire_core libahci crc_itu_t sky2
  [  144.446750] CPU: 1 PID: 1253 Comm: Xorg Tainted: G        W     3.13.0-43-generic #72-Ubuntu
  [  144.446753] Hardware name: Dell Inc. Inspiron 1525                   /0WP007, BIOS A17 10/27/2009
  [  144.446755]  0000000000000009 ffff8800aaaf99f8 ffffffff81720bf6 ffff8800aaaf9a40
  [  144.446759]  ffff8800aaaf9a30 ffffffff810677cd ffff8800aaaf9ab0 0000000000000001
  [  144.446763]  ffff880036621800 ffff880036621af8 ffff8800b6cc4800 ffff8800aaaf9a90
  [  144.446767] Call Trace:
  [  144.446770]  [<ffffffff81720bf6>] dump_stack+0x45/0x56
  [  144.446774]  [<ffffffff810677cd>] warn_slowpath_common+0x7d/0xa0
  [  144.446778]  [<ffffffff8106783c>] warn_slowpath_fmt+0x4c/0x50
  [  144.446802]  [<ffffffffa01ad285>] ? intel_sdvo_get_hw_state+0x55/0xc0 [i915]
  [  144.446823]  [<ffffffffa019751d>] intel_modeset_check_state+0x62d/0x780 [i915]
  [  144.446846]  [<ffffffffa0197705>] intel_set_mode+0x25/0x30 [i915]
  [  144.446867]  [<ffffffffa01977d6>] intel_release_load_detect_pipe+0xc6/0xf0 [i915]
  [  144.446892]  [<ffffffffa01bf8e9>] intel_tv_detect+0x359/0x500 [i915]
  [  144.446901]  [<ffffffffa00dc25b>] drm_helper_probe_single_connector_modes+0x1eb/0x380 [drm_kms_helper]
  [  144.446918]  [<ffffffffa011e617>] drm_mode_getconnector+0x417/0x480 [drm]
  [  144.446923]  [<ffffffff8108eb62>] ? __hrtimer_start_range_ns+0x1a2/0x3a0
  [  144.446936]  [<ffffffffa010fc22>] drm_ioctl+0x502/0x630 [drm]
  [  144.446942]  [<ffffffff81077f42>] ? __set_task_blocked+0x32/0x70
  [  144.446948]  [<ffffffff811d0e90>] do_vfs_ioctl+0x2e0/0x4c0
  [  144.446952]  [<ffffffff811d10f1>] SyS_ioctl+0x81/0xa0
  [  144.446956]  [<ffffffff817316ad>] system_call_fastpath+0x1a/0x1f
  [  144.446958] ---[ end trace ccc7cdf9d70214e2 ]---
  [  402.128351] perf samples too long (2503 > 2500), lowering kernel.perf_event_max_sample_rate to 50000

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-43-generic 3.13.0-43.72
  ProcVersionSignature: Ubuntu 3.13.0-43.72-generic 3.13.11.11
  Uname: Linux 3.13.0-43-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.6
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  gurvinder   2023 F.... pulseaudio
                        gurvinder   3161 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Fri Jan  2 01:27:54 2015
  HibernationDevice: RESUME=UUID=398088de-7b7e-4d91-adb0-4d5b4cb8d963
  InstallationDate: Installed on 2014-11-22 (40 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: Dell Inc. Inspiron 1525
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-43-generic root=UUID=6dc40c4b-5124-4216-a79f-44b870f54651 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-43-generic N/A
   linux-backports-modules-3.13.0-43-generic  N/A
   linux-firmware                             1.127.10
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/27/2009
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A17
  dmi.board.name: 0WP007
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA17:bd10/27/2009:svnDellInc.:pnInspiron1525:pvr:rvnDellInc.:rn0WP007:rvr:cvnDellInc.:ct8:cvr:
  dmi.product.name: Inspiron 1525
  dmi.sys.vendor: Dell Inc.

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