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[Ricardo Ferreira <1492764@xxxxxxxxxxxxxxxxxx>]

I also experience this in kubuntu 15.10 (upgrade), laptop hp g840

multiple traces of this type after boot

[   19.491720] [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in ips_enabled (expected 1, found 0)
[   19.491751] ------------[ cut here ]------------
[   19.491764] WARNING: CPU: 2 PID: 1424 at /build/linux-jJX2Dm/linux-4.2.0/drivers/gpu/drm/i915/intel_display.c:12326 check_crtc_state+0x2c5/0x440 [i915]()
[   19.491765] pipe state doesn't match!
[   19.491765] Modules linked in: pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) binfmt_misc bnep nls_iso8859_1 arc4 hp_wmi sparse_keymap intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp uvcvideo coretemp videobuf2_vmalloc crct10dif_pclmul videobuf2_memops btusb videobuf2_core btrtl crc32_pclmul v4l2_common ghash_clmulni_intel btbcm videodev btintel snd_hda_codec_hdmi bluetooth aesni_intel media snd_hda_codec_idt snd_hda_codec_generic aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd snd_hda_intel snd_hda_codec snd_hda_core iwlmvm snd_hwdep input_leds mac80211 joydev snd_pcm serio_raw snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq iwlwifi snd_seq_device snd_timer cfg80211 rtsx_pci_ms lpc_ich snd memstick mei_me mei shpchp soundcore 8250_fintek hp_accel lis3lv02d input_polldev
[   19.491792]  intel_smartconnect hp_wireless tpm_infineon mac_hid ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 kvm_intel kvm xt_hl ip6t_rt nf_conntrack_ipv6 nf_defrag_ipv6 ipt_REJECT nf_reject_ipv4 nf_log_ipv4 nf_log_common xt_LOG xt_limit xt_tcpudp xt_addrtype nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack ip6table_filter ip6_tables nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack iptable_filter ip_tables x_tables parport_pc ppdev lp parport autofs4 btrfs xor raid6_pq hid_generic usbhid hid rtsx_pci_sdmmc i915 rtsx_pci ahci i2c_algo_bit psmouse libahci drm_kms_helper e1000e drm ptp pps_core wmi video
[   19.491814] CPU: 2 PID: 1424 Comm: Xorg Tainted: G        W  OE   4.2.0-18-generic #22-Ubuntu
[   19.491815] Hardware name: Hewlett-Packard HP EliteBook 840 G1/198F, BIOS L71 Ver. 01.30 12/09/2014
[   19.491816]  0000000000000000 0000000044c43655 ffff88032c2c3878 ffffffff817e8c09
[   19.491818]  0000000000000000 ffff88032c2c38d0 ffff88032c2c38b8 ffffffff8107b3c6
[   19.491819]  ffff88032c2c38f8 ffff88032c2c3960 ffff88032aa5a800 0000000000000001
[   19.491821] Call Trace:
[   19.491823]  [<ffffffff817e8c09>] dump_stack+0x45/0x57
[   19.491826]  [<ffffffff8107b3c6>] warn_slowpath_common+0x86/0xc0
[   19.491828]  [<ffffffff8107b455>] warn_slowpath_fmt+0x55/0x70
[   19.491841]  [<ffffffffc0268bc1>] ? intel_pipe_config_compare+0xb31/0xc60 [i915]
[   19.491853]  [<ffffffffc0268fb5>] check_crtc_state+0x2c5/0x440 [i915]
[   19.491867]  [<ffffffffc027cd6d>] intel_modeset_check_state+0x21d/0x6d0 [i915]
[   19.491880]  [<ffffffffc027df27>] intel_crtc_set_config+0x4c7/0x580 [i915]
[   19.491888]  [<ffffffffc003d4c6>] drm_mode_set_config_internal+0x66/0x100 [drm]
[   19.491892]  [<ffffffffc00fd632>] restore_fbdev_mode+0xc2/0xf0 [drm_kms_helper]
[   19.491897]  [<ffffffffc00ff4e9>] drm_fb_helper_restore_fbdev_mode_unlocked+0x29/0x70 [drm_kms_helper]
[   19.491909]  [<ffffffffc028c07e>] intel_fbdev_restore_mode+0x1e/0x50 [i915]
[   19.491923]  [<ffffffffc02b5a9e>] i915_driver_lastclose+0xe/0x20 [i915]
[   19.491929]  [<ffffffffc003096e>] drm_lastclose+0x2e/0x140 [drm]
[   19.491934]  [<ffffffffc0030d96>] drm_release+0x316/0x500 [drm]
[   19.491936]  [<ffffffff811fee84>] __fput+0xe4/0x220
[   19.491938]  [<ffffffff811ff00e>] ____fput+0xe/0x10
[   19.491939]  [<ffffffff81098b55>] task_work_run+0x85/0xb0
[   19.491942]  [<ffffffff81014ea9>] do_notify_resume+0x69/0x70
[   19.491944]  [<ffffffff817efbc4>] int_signal+0x12/0x17
[   19.491945] ---[ end trace bff15b000dbe1aca ]---

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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:
  Incomplete

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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