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[Launchpad Bug Tracker <1396852@xxxxxxxxxxxxxxxxxx>]

*** This bug is a duplicate of bug 1384297 ***
    https://bugs.launchpad.net/bugs/1384297

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: linux-signed (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1396852

Title:
  repeated stacktrace about slowpath

Status in linux-signed package in Ubuntu:
  Confirmed

Bug description:
  [145984.025831] WARNING: CPU: 0 PID: 3405 at /build/buildd/linux-3.16.0/drivers/gpu/drm/i915/intel_pm.c:6001 intel_display_power_put+0xf9/0x160 [i915]()
  [145984.025833] Modules linked in: snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel snd_hda_controller btrfs xor raid6_pq ufs qnx4 hfsplus hfs minix ntfs msdos jfs asix usbnet mii hidp pl2303 usbserial nfnetlink xt_recent pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) veth xt_CHECKSUM bridge stp llc ctr ccm aufs rfcomm bnep binfmt_misc dm_crypt ip6t_REJECT nls_iso8859_1 xt_hl ip6t_rt nf_conntrack_ipv6 nf_defrag_ipv6 ipt_REJECT xt_comment xt_LOG xt_limit ipt_MASQUERADE xt_REDIRECT xt_tcpudp xt_addrtype xt_conntrack iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 intel_rapl ip6table_mangle x86_pkg_temp_thermal intel_powerclamp arc4 coretemp uvcvideo videobuf2_vmalloc kvm_intel videobuf2_memops videobuf2_core v4l2_common kvm btusb bluetooth videodev iptable_mangle 6lowpan_iphc
  [145984.025873]  media crct10dif_pclmul ip6table_filter hid_multitouch snd_hda_codec_generic ip6_tables crc32_pclmul nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat ghash_clmulni_intel nf_conntrack_ftp nf_conntrack snd_hda_codec iptable_filter snd_hwdep ip_tables x_tables iwlmvm snd_pcm mac80211 aesni_intel snd_seq_midi_event aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd thinkpad_acpi snd_rawmidi nvram iwlwifi snd_seq snd_seq_device cfg80211 snd_timer joydev rtsx_pci_ms serio_raw memstick snd mei_me soundcore mei shpchp lpc_ich mac_hid intel_smartconnect parport_pc xfs ppdev lp parport libcrc32c hid_generic usbhid hid rtsx_pci_sdmmc i915 e1000e ptp psmouse i2c_algo_bit pps_core drm_kms_helper ahci drm libahci rtsx_pci wmi video [last unloaded: snd_seq_midi]
  [145984.025913] CPU: 0 PID: 3405 Comm: Xorg Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
  [145984.025915] Hardware name: LENOVO 20ALCTO1WW/20ALCTO1WW, BIOS GIET69WW (2.19 ) 02/06/2014
  [145984.025916]  0000000000000009 ffff88001b173af8 ffffffff8277fcbc 0000000000000000
  [145984.025919]  ffff88001b173b30 ffffffff8206fd8d ffffffffc029c800 0000000000000001
  [145984.025922]  ffff8800da208520 0000000000000000 ffff8800da200000 ffff88001b173b40
  [145984.025925] Call Trace:
  [145984.025932]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
  [145984.025936]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
  [145984.025943]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
  [145984.025958]  [<ffffffffc01ee209>] intel_display_power_put+0xf9/0x160 [i915]
  [145984.025981]  [<ffffffffc0236ff4>] modeset_update_crtc_power_domains+0x204/0x210 [i915]
  [145984.026001]  [<ffffffffc023700e>] haswell_modeset_global_resources+0xe/0x10 [i915]
  [145984.026020]  [<ffffffffc023870a>] __intel_set_mode+0x5fa/0xab0 [i915]
  [145984.026039]  [<ffffffffc023baf6>] intel_set_mode+0x16/0x30 [i915]
  [145984.026057]  [<ffffffffc023cbba>] intel_crtc_set_config+0xa4a/0xda0 [i915]
  [145984.026077]  [<ffffffffc01066d1>] drm_mode_set_config_internal+0x61/0xe0 [drm]
  [145984.026094]  [<ffffffffc010a413>] drm_mode_setcrtc+0x283/0x580 [drm]
  [145984.026106]  [<ffffffffc00faa4f>] drm_ioctl+0x1df/0x680 [drm]
  [145984.026113]  [<ffffffff821f4bc8>] do_vfs_ioctl+0x2c8/0x4a0
  [145984.026116]  [<ffffffff821e31a1>] ? __sb_end_write+0x31/0x60
  [145984.026120]  [<ffffffff821e0d12>] ? vfs_write+0x1b2/0x1f0
  [145984.026122]  [<ffffffff821f4e21>] SyS_ioctl+0x81/0xa0
  [145984.026125]  [<ffffffff82787ced>] system_call_fastpath+0x1a/0x1f
  [145984.026127] ---[ end trace d30ba54846748be9 ]---
  [145984.332518] ------------[ cut here ]------------

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: linux-signed-image-3.16.0-25-generic 3.16.0-25.33
  ProcVersionSignature: Ubuntu 3.16.0-24.32-generic 3.16.4
  Uname: Linux 3.16.0-24-generic x86_64
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Wed Nov 26 18:39:18 2014
  SourcePackage: linux-signed
  UpgradeStatus: Upgraded to utopic on 2014-10-24 (33 days ago)

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