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[Alvin <info@xxxxxxxx>]

I now tested with 4.3.0-040300rc4-generic
The error is still there, but now only appears once.

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https://bugs.launchpad.net/bugs/1501765

Title:
  [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in
  dpll_hw_state.wrpll (expected 0xb012040f, found 0x00000000)

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  No actual trouble, (except having to restart plasmashell manually
  after each login, but that might not be related). Logs are full of
  warnings:

  Oct 01 14:52:39 pc-alvin kernel: [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in dpll_hw_state.wrpll (expected 0xb012040f, found 0x00000000)
  Oct 01 14:52:39 pc-alvin kernel: ------------[ cut here ]------------
  Oct 01 14:52:39 pc-alvin kernel: WARNING: CPU: 3 PID: 1033 at /build/linux-X28llO/linux-4.2.0/drivers/gpu/drm/i915/intel_display.c:12326 check_crtc_state+0x2c5/0x440 [i915]()
  Oct 01 14:52:39 pc-alvin kernel: pipe state doesn't match!
  Oct 01 14:52:39 pc-alvin kernel: Modules linked in: rfcomm bnep nls_iso8859_1 xfs libcrc32c intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm snd_hda_codec_hdmi snd_h
  Oct 01 14:52:39 pc-alvin kernel:  nf_conntrack_ftp nf_conntrack iptable_filter parport_pc ip_tables ppdev x_tables lp parport autofs4 drbg ansi_cprng algif_skcipher af_alg uas usb_storage hid_gener
  Oct 01 14:52:39 pc-alvin kernel: CPU: 3 PID: 1033 Comm: Xorg Tainted: G        W       4.2.0-12-generic #14-Ubuntu
  Oct 01 14:52:39 pc-alvin kernel: Hardware name: FUJITSU D3222-B1/D3222-B1, BIOS V4.6.5.4 R1.37.0 for D3222-B1x 08/06/2015
  Oct 01 14:52:39 pc-alvin kernel:  ffffffffc027eab0 ffff8804087737e8 ffffffff817b0cd5 0000000000000000
  Oct 01 14:52:39 pc-alvin kernel:  ffff880408773838 ffff880408773828 ffffffff81076536 ffff880408773858
  Oct 01 14:52:39 pc-alvin kernel:  ffff8804087738c0 ffff88040ba1e800 0000000000000001 ffff88040ba1eb50
  Oct 01 14:52:39 pc-alvin kernel: Call Trace:
  Oct 01 14:52:39 pc-alvin kernel:  [<ffffffff817b0cd5>] dump_stack+0x45/0x57
  Oct 01 14:52:39 pc-alvin kernel:  [<ffffffff81076536>] warn_slowpath_common+0x86/0xc0
  Oct 01 14:52:39 pc-alvin kernel:  [<ffffffff810765b6>] warn_slowpath_fmt+0x46/0x50
  Oct 01 14:52:39 pc-alvin kernel:  [<ffffffffc0211407>] ? intel_pipe_config_compare+0xa67/0xc60 [i915]
  Oct 01 14:52:39 pc-alvin kernel:  [<ffffffffc02118c5>] check_crtc_state+0x2c5/0x440 [i915]
  Oct 01 14:52:39 pc-alvin kernel:  [<ffffffffc02253de>] intel_modeset_check_state+0x20e/0x6b0 [i915]
  Oct 01 14:52:39 pc-alvin kernel:  [<ffffffffc0226587>] intel_crtc_set_config+0x4c7/0x580 [i915]
  Oct 01 14:52:39 pc-alvin kernel:  [<ffffffffc0039915>] ? drm_mode_create+0x25/0x60 [drm]
  Oct 01 14:52:39 pc-alvin kernel:  [<ffffffffc0033036>] drm_mode_set_config_internal+0x66/0x100 [drm]
  Oct 01 14:52:39 pc-alvin kernel:  [<ffffffffc00375f8>] drm_mode_setcrtc+0x3a8/0x4c0 [drm]
  Oct 01 14:52:39 pc-alvin kernel:  [<ffffffffc0028365>] drm_ioctl+0x125/0x610 [drm]
  Oct 01 14:52:39 pc-alvin kernel:  [<ffffffffc0037250>] ? drm_mode_setplane+0x1b0/0x1b0 [drm]
  Oct 01 14:52:39 pc-alvin kernel:  [<ffffffff81200075>] do_vfs_ioctl+0x285/0x470
  Oct 01 14:52:39 pc-alvin kernel:  [<ffffffff8108190f>] ? recalc_sigpending+0x1f/0x60
  Oct 01 14:52:39 pc-alvin kernel:  [<ffffffff810828b2>] ? __set_task_blocked+0x32/0x70
  Oct 01 14:52:39 pc-alvin kernel:  [<ffffffff812002d9>] SyS_ioctl+0x79/0x90
  Oct 01 14:52:39 pc-alvin kernel:  [<ffffffff817b7572>] entry_SYSCALL_64_fastpath+0x16/0x75
  Oct 01 14:52:39 pc-alvin kernel: ---[ end trace 9b3399ab2e633e05 ]---

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: linux-image-4.2.0-12-generic 4.2.0-12.14
  ProcVersionSignature: Ubuntu 4.2.0-12.14-generic 4.2.1
  Uname: Linux 4.2.0-12-generic x86_64
  ApportVersion: 2.19-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  alvin      1495 F.... pulseaudio
   /dev/snd/controlC1:  alvin      1495 F.... pulseaudio
  CurrentDesktop: KDE
  Date: Thu Oct  1 15:28:34 2015
  HibernationDevice: RESUME=UUID=d6485f6e-2acf-4d0e-b368-65c0bb79b539
  InstallationDate: Installed on 2015-10-01 (0 days ago)
  InstallationMedia: Kubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150924)
  IwConfig:
   enp0s25   no wireless extensions.
   
   lo        no wireless extensions.
  MachineType: FUJITSU D3222-B1
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.2.0-12-generic.efi.signed root=/dev/mapper/kubuntu-root ro noprompt quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-12-generic N/A
   linux-backports-modules-4.2.0-12-generic  N/A
   linux-firmware                            1.148
  RfKill:
   0: hci0: Bluetooth
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/06/2015
  dmi.bios.vendor: FUJITSU // American Megatrends Inc.
  dmi.bios.version: V4.6.5.4 R1.37.0 for D3222-B1x
  dmi.board.name: D3222-B1
  dmi.board.vendor: FUJITSU
  dmi.board.version: S26361-D3222-B1
  dmi.chassis.type: 6
  dmi.chassis.vendor: FUJITSU
  dmi.modalias: dmi:bvnFUJITSU//AmericanMegatrendsInc.:bvrV4.6.5.4R1.37.0forD3222-B1x:bd08/06/2015:svnFUJITSU:pnD3222-B1:pvr:rvnFUJITSU:rnD3222-B1:rvrS26361-D3222-B1:cvnFUJITSU:ct6:cvr:
  dmi.product.name: D3222-B1
  dmi.sys.vendor: FUJITSU

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