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[Giuseppe Iannello <1492764@xxxxxxxxxxxxxxxxxx>]

Same error here, different stacktraces. It started with the upgrade of linux-image-generic from 4.1.0.3.3 to 4.2.0.7.7.
Hardware is a Lenovo T440s - no hybrid cards, only the integrated Intel. All the external display outputs available on the docking station are not working - X freezes as soon as I connect any external monitor (HDMI or DVI).
Using the docking station without any external monitor connected works fine.

[  215.283067] [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in ips_enabled (expected 1, found 0)
[  215.284105] ------------[ cut here ]------------
[  215.284119] WARNING: CPU: 1 PID: 6 at /build/linux-4dBub_/linux-4.2.0/drivers/gpu/drm/i915/intel_display.c:12324 check_crtc_state+0x2c5/0x440 [i915]()
[  215.284120] pipe state doesn't match!
[  215.284120] Modules linked in: rfcomm pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) ctr ccm bnep nls_iso8859_1 arc4 uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media iwlmvm mac80211 intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp snd_hda_codec_hdmi kvm_intel joydev kvm input_leds serio_raw snd_hda_codec_realtek btusb snd_hda_codec_generic btrtl btbcm btintel bluetooth iwlwifi snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep thinkpad_acpi snd_seq_midi snd_pcm nvram snd_seq_midi_event lpc_ich snd_rawmidi snd_seq cfg80211 rtsx_pci_ms memstick snd_seq_device shpchp snd_timer snd mei_me mei soundcore mac_hid nfsd auth_rpcgss nfs_acl lockd grace sunrpc parport_pc ppdev lp parport autofs4 drbg ansi_cprng algif_skcipher af_alg dm_crypt
[  215.284152]  hid_generic hid_cherry usbhid hid rtsx_pci_sdmmc crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper i915 cryptd psmouse ahci libahci rtsx_pci i2c_algo_bit drm_kms_helper e1000e drm ptp pps_core wmi video
[  215.284166] CPU: 1 PID: 6 Comm: kworker/u16:0 Tainted: G        W  OE   4.2.0-7-generic #7-Ubuntu
[  215.284167] Hardware name: LENOVO 20AQCTO1WW/20AQCTO1WW, BIOS GJET79WW (2.29 ) 09/03/2014
[  215.284178] Workqueue: i915-dp i915_digport_work_func [i915]
[  215.284180]  ffffffffc025d1e8 ffff88030ff2f698 ffffffff817b0465 0000000000000000
[  215.284182]  ffff88030ff2f6e8 ffff88030ff2f6d8 ffffffff81076536 ffff88030ff2f708
[  215.284183]  ffff88030ff2f770 ffff88030ab3d800 0000000000000001 ffff88030ab3db50
[  215.284185] Call Trace:
[  215.284188]  [<ffffffff817b0465>] dump_stack+0x45/0x57
[  215.284191]  [<ffffffff81076536>] warn_slowpath_common+0x86/0xc0
[  215.284193]  [<ffffffff810765b6>] warn_slowpath_fmt+0x46/0x50
[  215.284204]  [<ffffffffc01f1091>] ? intel_pipe_config_compare+0xb31/0xc60 [i915]
[  215.284215]  [<ffffffffc01f1485>] check_crtc_state+0x2c5/0x440 [i915]
[  215.284228]  [<ffffffffc0204f3e>] intel_modeset_check_state+0x20e/0x6b0 [i915]
[  215.284239]  [<ffffffffc02060e7>] intel_crtc_set_config+0x4c7/0x580 [i915]
[  215.284250]  [<ffffffffc0047036>] drm_mode_set_config_internal+0x66/0x100 [drm]
[  215.284255]  [<ffffffffc01063b2>] restore_fbdev_mode+0xc2/0xf0 [drm_kms_helper]
[  215.284259]  [<ffffffffc0108239>] drm_fb_helper_restore_fbdev_mode_unlocked+0x29/0x70 [drm_kms_helper]
[  215.284263]  [<ffffffffc01082a2>] drm_fb_helper_set_par+0x22/0x40 [drm_kms_helper]
[  215.284267]  [<ffffffffc01081ca>] drm_fb_helper_hotplug_event+0xca/0x110 [drm_kms_helper]
[  215.284279]  [<ffffffffc0213f1e>] intel_fbdev_output_poll_changed+0x1e/0x30 [i915]
[  215.284282]  [<ffffffffc00fc55b>] drm_kms_helper_hotplug_event+0x2b/0x40 [drm_kms_helper]
[  215.284294]  [<ffffffffc0226f15>] intel_dp_mst_hotplug+0x15/0x20 [i915]
[  215.284298]  [<ffffffffc00ffa61>] drm_dp_destroy_port+0xe1/0xf0 [drm_kms_helper]
[  215.284302]  [<ffffffffc00ffb8a>] drm_dp_destroy_mst_branch_device+0x11a/0x140 [drm_kms_helper]
[  215.284305]  [<ffffffffc0100875>] drm_dp_mst_topology_mgr_set_mst+0x125/0x390 [drm_kms_helper]
[  215.284318]  [<ffffffffc02250fc>] intel_dp_hpd_pulse+0xfc/0x470 [i915]
[  215.284328]  [<ffffffffc01cd935>] i915_digport_work_func+0x95/0x110 [i915]
[  215.284332]  [<ffffffff8108e01a>] process_one_work+0x1aa/0x440
[  215.284334]  [<ffffffff8108e2fb>] worker_thread+0x4b/0x4c0
[  215.284336]  [<ffffffff8108e2b0>] ? process_one_work+0x440/0x440
[  215.284338]  [<ffffffff81094369>] kthread+0xc9/0xe0
[  215.284340]  [<ffffffff810942a0>] ? kthread_create_on_node+0x1c0/0x1c0
[  215.284342]  [<ffffffff817b711f>] ret_from_fork+0x3f/0x70
[  215.284344]  [<ffffffff810942a0>] ? kthread_create_on_node+0x1c0/0x1c0
[  215.284345] ---[ end trace d503c504b95cc885 ]---

and

[  215.286091] [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in ips_enabled (expected 1, found 0)
[  215.287883] ------------[ cut here ]------------
[  215.287908] WARNING: CPU: 0 PID: 216 at /build/linux-4dBub_/linux-4.2.0/drivers/gpu/drm/i915/intel_display.c:12324 check_crtc_state+0x2c5/0x440 [i915]()
[  215.287911] pipe state doesn't match!
[  215.287912] Modules linked in: rfcomm pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) ctr ccm bnep nls_iso8859_1 arc4 uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media iwlmvm mac80211 intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp snd_hda_codec_hdmi kvm_intel joydev kvm input_leds serio_raw snd_hda_codec_realtek btusb snd_hda_codec_generic btrtl btbcm btintel bluetooth iwlwifi snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep thinkpad_acpi snd_seq_midi snd_pcm nvram snd_seq_midi_event lpc_ich snd_rawmidi snd_seq cfg80211 rtsx_pci_ms memstick snd_seq_device shpchp snd_timer snd mei_me mei soundcore mac_hid nfsd auth_rpcgss nfs_acl lockd grace sunrpc parport_pc ppdev lp parport autofs4 drbg ansi_cprng algif_skcipher af_alg dm_crypt
[  215.287959]  hid_generic hid_cherry usbhid hid rtsx_pci_sdmmc crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper i915 cryptd psmouse ahci libahci rtsx_pci i2c_algo_bit drm_kms_helper e1000e drm ptp pps_core wmi video
[  215.287978] CPU: 0 PID: 216 Comm: kworker/0:3 Tainted: G        W  OE   4.2.0-7-generic #7-Ubuntu
[  215.287980] Hardware name: LENOVO 20AQCTO1WW/20AQCTO1WW, BIOS GJET79WW (2.29 ) 09/03/2014
[  215.287987] Workqueue: events drm_dp_destroy_connector_work [drm_kms_helper]
[  215.287990]  ffffffffc025d1e8 ffff88030a4578f8 ffffffff817b0465 0000000000000000
[  215.287993]  ffff88030a457948 ffff88030a457938 ffffffff81076536 ffff88030a457968
[  215.287995]  ffff88030a4579d0 ffff88030ab3d800 0000000000000001 ffff88030ab3db50
[  215.287998] Call Trace:
[  215.288003]  [<ffffffff817b0465>] dump_stack+0x45/0x57
[  215.288008]  [<ffffffff81076536>] warn_slowpath_common+0x86/0xc0
[  215.288011]  [<ffffffff810765b6>] warn_slowpath_fmt+0x46/0x50
[  215.288029]  [<ffffffffc01f1091>] ? intel_pipe_config_compare+0xb31/0xc60 [i915]
[  215.288044]  [<ffffffffc01f1485>] check_crtc_state+0x2c5/0x440 [i915]
[  215.288063]  [<ffffffffc0204f3e>] intel_modeset_check_state+0x20e/0x6b0 [i915]
[  215.288078]  [<ffffffffc020542e>] intel_connector_dpms+0x4e/0x70 [i915]
[  215.288094]  [<ffffffffc0227844>] intel_dp_destroy_mst_connector+0x34/0xc0 [i915]
[  215.288099]  [<ffffffffc00ffc3e>] drm_dp_destroy_connector_work+0x8e/0xf0 [drm_kms_helper]
[  215.288104]  [<ffffffff8108e01a>] process_one_work+0x1aa/0x440
[  215.288106]  [<ffffffff8108e2fb>] worker_thread+0x4b/0x4c0
[  215.288109]  [<ffffffff8108e2b0>] ? process_one_work+0x440/0x440
[  215.288112]  [<ffffffff8108e2b0>] ? process_one_work+0x440/0x440
[  215.288114]  [<ffffffff81094369>] kthread+0xc9/0xe0
[  215.288117]  [<ffffffff810942a0>] ? kthread_create_on_node+0x1c0/0x1c0
[  215.288120]  [<ffffffff817b711f>] ret_from_fork+0x3f/0x70
[  215.288124]  [<ffffffff810942a0>] ? kthread_create_on_node+0x1c0/0x1c0
[  215.288125] ---[ end trace d503c504b95cc887 ]---

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https://bugs.launchpad.net/bugs/1492764

Title:
  [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in ips_enabled
  (expected 1, found 0)

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  System: Kubuntu 15.10

  Since kernel version 4.2 I have a few of this errors:

  Sep 06 16:16:35 benediktZ50-70 kernel: [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in ips_enabled (expected 1, found 0)
  Sep 06 16:16:35 benediktZ50-70 kernel: ------------[ cut here ]------------
  Sep 06 16:16:35 benediktZ50-70 kernel: WARNING: CPU: 0 PID: 187 at /build/linux-4dBub_/linux-4.2.0/drivers/gpu/drm/i915/intel_display.c:12324 check_crtc_state+0x2c5/0x440 [i915]()
  Sep 06 16:16:35 benediktZ50-70 kernel: pipe state doesn't match!
  Sep 06 16:16:35 benediktZ50-70 kernel: Modules linked in: rtsx_usb_sdmmc rtsx_usb i915 i2c_algo_bit drm_kms_helper psmouse ahci drm libahci r8169 mii sdhci_acpi video sdhci i2c_hid hid
  Sep 06 16:16:35 benediktZ50-70 kernel: CPU: 0 PID: 187 Comm: plymouthd Tainted: G        W       4.2.0-7-generic #7-Ubuntu
  Sep 06 16:16:35 benediktZ50-70 kernel: Hardware name: LENOVO 20354/Lancer 5A5, BIOS 9BCN91WW 07/21/2015
  Sep 06 16:16:35 benediktZ50-70 kernel:  ffffffffc023f1e8 ffff8802413277e8 ffffffff817b0465 0000000000000000
  Sep 06 16:16:35 benediktZ50-70 kernel:  ffff880241327838 ffff880241327828 ffffffff81076536 ffff880241327858
  Sep 06 16:16:35 benediktZ50-70 kernel:  ffff8802413278c0 ffff880241152000 0000000000000001 ffff880241152350
  Sep 06 16:16:35 benediktZ50-70 kernel: Call Trace:
  Sep 06 16:16:35 benediktZ50-70 kernel:  [<ffffffff817b0465>] dump_stack+0x45/0x57
  Sep 06 16:16:35 benediktZ50-70 kernel:  [<ffffffff81076536>] warn_slowpath_common+0x86/0xc0
  Sep 06 16:16:35 benediktZ50-70 kernel:  [<ffffffff810765b6>] warn_slowpath_fmt+0x46/0x50
  Sep 06 16:16:35 benediktZ50-70 kernel:  [<ffffffffc01d3091>] ? intel_pipe_config_compare+0xb31/0xc60 [i915]
  Sep 06 16:16:35 benediktZ50-70 kernel:  [<ffffffffc01d3485>] check_crtc_state+0x2c5/0x440 [i915]
  Sep 06 16:16:35 benediktZ50-70 kernel:  [<ffffffffc01e6f3e>] intel_modeset_check_state+0x20e/0x6b0 [i915]
  Sep 06 16:16:35 benediktZ50-70 kernel:  [<ffffffffc01e80e7>] intel_crtc_set_config+0x4c7/0x580 [i915]
  Sep 06 16:16:35 benediktZ50-70 kernel:  [<ffffffffc009f915>] ? drm_mode_create+0x25/0x60 [drm]
  Sep 06 16:16:35 benediktZ50-70 kernel:  [<ffffffffc0099036>] drm_mode_set_config_internal+0x66/0x100 [drm]
  Sep 06 16:16:35 benediktZ50-70 kernel:  [<ffffffffc009d5f8>] drm_mode_setcrtc+0x3a8/0x4c0 [drm]
  Sep 06 16:16:35 benediktZ50-70 kernel:  [<ffffffffc008e365>] drm_ioctl+0x125/0x610 [drm]
  Sep 06 16:16:35 benediktZ50-70 kernel:  [<ffffffffc009d250>] ? drm_mode_setplane+0x1b0/0x1b0 [drm]
  Sep 06 16:16:35 benediktZ50-70 kernel:  [<ffffffff811fffd5>] do_vfs_ioctl+0x285/0x470
  Sep 06 16:16:35 benediktZ50-70 kernel:  [<ffffffff811ac159>] ? do_munmap+0x349/0x480
  Sep 06 16:16:35 benediktZ50-70 kernel:  [<ffffffff81200239>] SyS_ioctl+0x79/0x90
  Sep 06 16:16:35 benediktZ50-70 kernel:  [<ffffffff817b6cf2>] entry_SYSCALL_64_fastpath+0x16/0x75
  Sep 06 16:16:35 benediktZ50-70 kernel: ---[ end trace 724377a3c01e4270 ]---

  
  I will check next week if these errors have any impact on my system.

  This is a Nvidia Optimus System with the Intel graphic card activated
  by default.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: linux-image-4.2.0-7-generic 4.2.0-7.7
  ProcVersionSignature: Ubuntu 4.2.0-7.7-generic 4.2.0
  Uname: Linux 4.2.0-7-generic x86_64
  ApportVersion: 2.18-0ubuntu9
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  benedikt   1550 F.... pulseaudio
   /dev/snd/controlC1:  benedikt   1550 F.... pulseaudio
  CurrentDesktop: KDE
  Date: Sun Sep  6 16:22:48 2015
  HibernationDevice: UUID=3383b02e-b89c-462c-903a-cb936e81b2bf
  InstallationDate: Installed on 2014-12-21 (259 days ago)
  InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20141218)
  MachineType: LENOVO 20354
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-7-generic root=UUID=b549945a-67ac-4d14-849c-b54e561d47cc ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-7-generic N/A
   linux-backports-modules-4.2.0-7-generic  N/A
   linux-firmware                           1.147
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/21/2015
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 9BCN91WW
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: Lancer 5A5
  dmi.board.vendor: LENOVO
  dmi.board.version: 31900058WIN
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo Z50-70
  dmi.modalias: dmi:bvnLENOVO:bvr9BCN91WW:bd07/21/2015:svnLENOVO:pn20354:pvrLenovoZ50-70:rvnLENOVO:rnLancer5A5:rvr31900058WIN:cvnLENOVO:ct10:cvrLenovoZ50-70:
  dmi.product.name: 20354
  dmi.product.version: Lenovo Z50-70
  dmi.sys.vendor: LENOVO

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