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[Bug 1431655] Re: Stack traces on bott

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apport information

** Tags added: apport-collected vivid

** Description changed:

  Macbook Air 	
          Manufacturer: Apple Inc.
  	Product Name: Mac-66F35F19FE2A0D05
  	Version: MacBookAir5,1
  
  Kernel Version: Last Vivid Beta - Xubuntu
         Linux accensi-MacBookAir 3.19.0-9-generic #9-Ubuntu SMP Wed Mar 11 17:50:03 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
  Same errors on last 3 kernel versions
  
  Thunderbolt
  
  Could not check yet if video display port is working
  
  [Qui Mar 12 14:45:21 2015] ------------[ cut here ]------------
  [Qui Mar 12 14:45:21 2015] WARNING: CPU: 0 PID: 162 at /build/buildd/linux-3.19.
  0/drivers/thunderbolt/switch.c:95 tb_wait_for_port+0x376/0x410 [thunderbolt]()
  [Qui Mar 12 14:45:21 2015] thunderbolt 0000:05:00.0: 0:0: does not have PHY
  [Qui Mar 12 14:45:21 2015] Modules linked in: btusb bluetooth arc4 brcmsmac cord
  ic joydev brcmutil bcm5974 b43 uvcvideo videobuf2_vmalloc videobuf2_memops video
  buf2_core v4l2_common snd_hda_codec_hdmi videodev mac80211 snd_hda_codec_cirrus 
  snd_hda_codec_generic media cfg80211 ssb intel_rapl snd_hda_intel snd_hda_contro
  ller iosf_mbi snd_hda_codec x86_pkg_temp_thermal intel_powerclamp snd_hwdep core
  temp snd_pcm kvm_intel kvm crct10dif_pclmul crc32_pclmul snd_seq_midi ghash_clmu
  lni_intel snd_seq_midi_event applesmc input_polldev snd_rawmidi aesni_intel aes_
  x86_64 lrw gf128mul snd_seq glue_helper ablk_helper cryptd snd_seq_device snd_ti
  mer i915 snd thunderbolt lpc_ich bcma drm_kms_helper soundcore drm sbs mei_me me
  i sbshc mac_hid i2c_algo_bit shpchp video apple_bl parport_pc ppdev lp parport a
  utofs4 hid_generic hid_apple
  [Qui Mar 12 14:45:21 2015]  usbhid hid ahci libahci
  [Qui Mar 12 14:45:21 2015] CPU: 0 PID: 162 Comm: kworker/u16:4 Not tainted 3.19.
  0-9-generic #9-Ubuntu
  [Qui Mar 12 14:45:21 2015] Hardware name: Apple Inc. MacBookAir5,1/Mac-66F35F19F
  E2A0D05, BIOS MBA51.88Z.00EF.B02.1211271028 11/27/2012
  [Qui Mar 12 14:45:21 2015] Workqueue: thunderbolt tb_handle_hotplug [thunderbolt
  ]
  [Qui Mar 12 14:45:21 2015]  ffffffffc0432ff8 ffff8802621fbc88 ffffffff817c09b5 0
  000000000000007
  [Qui Mar 12 14:45:21 2015]  ffff8802621fbcd8 ffff8802621fbcc8 ffffffff8107595a f
  fff88008a485780
  [Qui Mar 12 14:45:21 2015]  0000000000000000 ffff88026572d630 0000000000000000 f
  fff880089ac5e00
  [Qui Mar 12 14:45:21 2015] Call Trace:
  [Qui Mar 12 14:45:21 2015]  [<ffffffff817c09b5>] dump_stack+0x45/0x57
  [Qui Mar 12 14:45:21 2015]  [<ffffffff8107595a>] warn_slowpath_common+0x8a/0xc0
  [Qui Mar 12 14:45:21 2015]  [<ffffffff810759d6>] warn_slowpath_fmt+0x46/0x50
  [Qui Mar 12 14:45:21 2015]  [<ffffffffc042e386>] tb_wait_for_port+0x376/0x410 [t
  hunderbolt]
  [Qui Mar 12 14:45:21 2015]  [<ffffffff810ad111>] ? put_prev_entity+0x31/0x430
  [Qui Mar 12 14:45:21 2015]  [<ffffffff815013c3>] ? _dev_info+0x53/0x60
  [Qui Mar 12 14:45:21 2015]  [<ffffffff810135e0>] ? __switch_to+0x150/0x5f0
  [Qui Mar 12 14:45:21 2015]  [<ffffffffc042d667>] tb_scan_port+0x67/0x1c0 [thunde
  rbolt]
  [Qui Mar 12 14:45:21 2015]  [<ffffffffc042d9e1>] tb_handle_hotplug+0x1d1/0x360 [thunderbolt]
  [Qui Mar 12 14:45:21 2015]  [<ffffffff8108eb48>] process_one_work+0x158/0x430
  [Qui Mar 12 14:45:21 2015]  [<ffffffff8108f5db>] worker_thread+0x5b/0x530
  [Qui Mar 12 14:45:21 2015]  [<ffffffff8108f580>] ? rescuer_thread+0x3a0/0x3a0
  [Qui Mar 12 14:45:21 2015]  [<ffffffff81094679>] kthread+0xc9/0xe0
  [Qui Mar 12 14:45:21 2015]  [<ffffffff810945b0>] ? kthread_create_on_node+0x1c0/0x1c0
  [Qui Mar 12 14:45:21 2015]  [<ffffffff817c7a3c>] ret_from_fork+0x7c/0xb0
  [Qui Mar 12 14:45:21 2015]  [<ffffffff810945b0>] ? kthread_create_on_node+0x1c0/0x1c0
  [Qui Mar 12 14:45:21 2015] ---[ end trace ae4c204be5c5e718 ]---
  [Qui Mar 12 14:46:51 2015] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
  
  
  DRM Crash
  
  [Qui Mar 12 14:45:23 2015] ------------[ cut here ]------------
  [Qui Mar 12 14:45:23 2015] WARNING: CPU: 0 PID: 536 at /build/buildd/linux-3.19.0/drivers/gpu/drm/i915/intel_audio.c:291 ilk_audio_codec_disable+0x170/0x1b0 [i915]()
  [Qui Mar 12 14:45:23 2015] WARN_ON(!port)
  [Qui Mar 12 14:45:23 2015] Modules linked in:
  [Qui Mar 12 14:45:23 2015]  nls_iso8859_1 btusb bluetooth arc4 brcmsmac cordic joydev brcmutil bcm5974 b43 uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common snd_hda_codec_hdmi videodev mac80211 snd_hda_codec_cirrus snd_hda_codec_generic media cfg80211 ssb intel_rapl snd_hda_intel snd_hda_controller iosf_mbi snd_hda_codec x86_pkg_temp_thermal intel_powerclamp snd_hwdep coretemp snd_pcm kvm_intel kvm crct10dif_pclmul crc32_pclmul snd_seq_midi ghash_clmulni_intel snd_seq_midi_event applesmc input_polldev snd_rawmidi aesni_intel aes_x86_64 lrw gf128mul snd_seq glue_helper ablk_helper cryptd snd_seq_device snd_timer i915 snd thunderbolt lpc_ich bcma drm_kms_helper soundcore drm sbs mei_me mei sbshc mac_hid i2c_algo_bit shpchp video apple_bl parport_pc ppdev lp parport autofs4 hid_generic hid_apple
  [Qui Mar 12 14:45:23 2015]  usbhid hid ahci libahci
  [Qui Mar 12 14:45:23 2015] CPU: 0 PID: 536 Comm: plymouthd Tainted: G        W      3.19.0-9-generic #9-Ubuntu
  [Qui Mar 12 14:45:23 2015] Hardware name: Apple Inc. MacBookAir5,1/Mac-66F35F19FE2A0D05, BIOS MBA51.88Z.00EF.B02.1211271028 11/27/2012
  [Qui Mar 12 14:45:23 2015]  ffffffffc051a4b0 ffff8802647239b8 ffffffff817c09b5 0000000000000007
  [Qui Mar 12 14:45:23 2015]  ffff880264723a08 ffff8802647239f8 ffffffff8107595a 0000000000000086
  [Qui Mar 12 14:45:23 2015]  ffff880262eb0000 00000000fffffeee 0000000030000000 00000000000e50c0
  [Qui Mar 12 14:45:23 2015] Call Trace:
  [Qui Mar 12 14:45:23 2015]  [<ffffffff817c09b5>] dump_stack+0x45/0x57
  [Qui Mar 12 14:45:23 2015]  [<ffffffff8107595a>] warn_slowpath_common+0x8a/0xc0
  [Qui Mar 12 14:45:23 2015]  [<ffffffff810759d6>] warn_slowpath_fmt+0x46/0x50
  [Qui Mar 12 14:45:23 2015]  [<ffffffffc04aba00>] ilk_audio_codec_disable+0x170/0x1b0 [i915]
  [Qui Mar 12 14:45:23 2015]  [<ffffffffc04ac2fe>] intel_audio_codec_disable+0x1e/0x30 [i915]
  [Qui Mar 12 14:45:23 2015]  [<ffffffffc04e3565>] intel_disable_dp+0x75/0xb0 [i915]
  [Qui Mar 12 14:45:23 2015]  [<ffffffffc04bfe4a>] ironlake_crtc_disable+0x15a/0x7b0 [i915]
  [Qui Mar 12 14:45:23 2015]  [<ffffffffc04c1489>] __intel_set_mode+0xa59/0xc80 [i915]
  [Qui Mar 12 14:45:23 2015]  [<ffffffffc04c810b>] intel_crtc_set_config+0xbfb/0xf70 [i915]
  [Qui Mar 12 14:45:23 2015]  [<ffffffffc04c1489>] __intel_set_mode+0xa59/0xc80 [i
  915]
  [Qui Mar 12 14:45:23 2015]  [<ffffffffc04c810b>] intel_crtc_set_config+0xbfb/0xf
  70 [i915]
  [Qui Mar 12 14:45:23 2015]  [<ffffffffc036a926>] drm_mode_set_config_internal+0x
  66/0x100 [drm]
  [Qui Mar 12 14:45:23 2015]  [<ffffffffc036ea03>] drm_mode_setcrtc+0x283/0x580 [d
  rm]
  [Qui Mar 12 14:45:23 2015]  [<ffffffffc035fadf>] drm_ioctl+0x1df/0x680 [drm]
  [Qui Mar 12 14:45:23 2015]  [<ffffffff812077b0>] do_vfs_ioctl+0x2e0/0x4e0
  [Qui Mar 12 14:45:23 2015]  [<ffffffff811afbf8>] ? SyS_mmap_pgoff+0xe8/0x290
  [Qui Mar 12 14:45:23 2015]  [<ffffffff81207a31>] SyS_ioctl+0x81/0xa0
  [Qui Mar 12 14:45:23 2015]  [<ffffffff817c7aed>] system_call_fastpath+0x16/0x1b
  [Qui Mar 12 14:45:23 2015] ---[ end trace ae4c204be5c5e719 ]---
  [Qui Mar 12 14:46:51 2015] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
  [Qui Mar 12 14:46:51 2015] Bluetooth: BNEP filters: protocol multicast
  [Qui Mar 12 14:46:51 2015] Bluetooth: BNEP socket layer initialized
  [Qui Mar 12 14:46:51 2015] Bluetooth: RFCOMM TTY layer initialized
  
  Resumes normal boot after 90 sec, audio and video are funcional
+ --- 
+ ApportVersion: 2.16.2-0ubuntu2
+ Architecture: amd64
+ AudioDevicesInUse:
+  USER        PID ACCESS COMMAND
+  /dev/snd/controlC0:  accensi    1697 F.... pulseaudio
+ CurrentDesktop: XFCE
+ DistroRelease: Ubuntu 15.04
+ InstallationDate: Installed on 2015-02-04 (36 days ago)
+ InstallationMedia: Xubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
+ MachineType: Apple Inc. MacBookAir5,1
+ Package: linux (not installed)
+ ProcFB: 0 inteldrmfb
+ ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-9-generic.efi.signed root=UUID=eac2d024-2c90-4e64-a96e-782a883f0c22 ro quiet splash vt.handoff=7
+ ProcVersionSignature: Ubuntu 3.19.0-9.9-generic 3.19.1
+ Tags:  vivid
+ Uname: Linux 3.19.0-9-generic x86_64
+ UpgradeStatus: Upgraded to vivid on 2015-03-10 (2 days ago)
+ UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
+ _MarkForUpload: True
+ dmi.bios.date: 11/27/2012
+ dmi.bios.vendor: Apple Inc.
+ dmi.bios.version: MBA51.88Z.00EF.B02.1211271028
+ dmi.board.asset.tag: Base Board Asset Tag#
+ dmi.board.name: Mac-66F35F19FE2A0D05
+ dmi.board.vendor: Apple Inc.
+ dmi.board.version: MacBookAir5,1
+ dmi.chassis.type: 10
+ dmi.chassis.vendor: Apple Inc.
+ dmi.chassis.version: Mac-66F35F19FE2A0D05
+ dmi.modalias: dmi:bvnAppleInc.:bvrMBA51.88Z.00EF.B02.1211271028:bd11/27/2012:svnAppleInc.:pnMacBookAir5,1:pvr1.0:rvnAppleInc.:rnMac-66F35F19FE2A0D05:rvrMacBookAir5,1:cvnAppleInc.:ct10:cvrMac-66F35F19FE2A0D05:
+ dmi.product.name: MacBookAir5,1
+ dmi.product.version: 1.0
+ dmi.sys.vendor: Apple Inc.

** Attachment added: "AlsaInfo.txt"
   https://bugs.launchpad.net/bugs/1431655/+attachment/4343663/+files/AlsaInfo.txt

-- 
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https://bugs.launchpad.net/bugs/1431655

Title:
  Stack traces on bott

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Macbook Air 	
          Manufacturer: Apple Inc.
  	Product Name: Mac-66F35F19FE2A0D05
  	Version: MacBookAir5,1

  Kernel Version: Last Vivid Beta - Xubuntu
         Linux accensi-MacBookAir 3.19.0-9-generic #9-Ubuntu SMP Wed Mar 11 17:50:03 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
  Same errors on last 3 kernel versions

  Thunderbolt

  Could not check yet if video display port is working

  [Qui Mar 12 14:45:21 2015] ------------[ cut here ]------------
  [Qui Mar 12 14:45:21 2015] WARNING: CPU: 0 PID: 162 at /build/buildd/linux-3.19.
  0/drivers/thunderbolt/switch.c:95 tb_wait_for_port+0x376/0x410 [thunderbolt]()
  [Qui Mar 12 14:45:21 2015] thunderbolt 0000:05:00.0: 0:0: does not have PHY
  [Qui Mar 12 14:45:21 2015] Modules linked in: btusb bluetooth arc4 brcmsmac cord
  ic joydev brcmutil bcm5974 b43 uvcvideo videobuf2_vmalloc videobuf2_memops video
  buf2_core v4l2_common snd_hda_codec_hdmi videodev mac80211 snd_hda_codec_cirrus 
  snd_hda_codec_generic media cfg80211 ssb intel_rapl snd_hda_intel snd_hda_contro
  ller iosf_mbi snd_hda_codec x86_pkg_temp_thermal intel_powerclamp snd_hwdep core
  temp snd_pcm kvm_intel kvm crct10dif_pclmul crc32_pclmul snd_seq_midi ghash_clmu
  lni_intel snd_seq_midi_event applesmc input_polldev snd_rawmidi aesni_intel aes_
  x86_64 lrw gf128mul snd_seq glue_helper ablk_helper cryptd snd_seq_device snd_ti
  mer i915 snd thunderbolt lpc_ich bcma drm_kms_helper soundcore drm sbs mei_me me
  i sbshc mac_hid i2c_algo_bit shpchp video apple_bl parport_pc ppdev lp parport a
  utofs4 hid_generic hid_apple
  [Qui Mar 12 14:45:21 2015]  usbhid hid ahci libahci
  [Qui Mar 12 14:45:21 2015] CPU: 0 PID: 162 Comm: kworker/u16:4 Not tainted 3.19.
  0-9-generic #9-Ubuntu
  [Qui Mar 12 14:45:21 2015] Hardware name: Apple Inc. MacBookAir5,1/Mac-66F35F19F
  E2A0D05, BIOS MBA51.88Z.00EF.B02.1211271028 11/27/2012
  [Qui Mar 12 14:45:21 2015] Workqueue: thunderbolt tb_handle_hotplug [thunderbolt
  ]
  [Qui Mar 12 14:45:21 2015]  ffffffffc0432ff8 ffff8802621fbc88 ffffffff817c09b5 0
  000000000000007
  [Qui Mar 12 14:45:21 2015]  ffff8802621fbcd8 ffff8802621fbcc8 ffffffff8107595a f
  fff88008a485780
  [Qui Mar 12 14:45:21 2015]  0000000000000000 ffff88026572d630 0000000000000000 f
  fff880089ac5e00
  [Qui Mar 12 14:45:21 2015] Call Trace:
  [Qui Mar 12 14:45:21 2015]  [<ffffffff817c09b5>] dump_stack+0x45/0x57
  [Qui Mar 12 14:45:21 2015]  [<ffffffff8107595a>] warn_slowpath_common+0x8a/0xc0
  [Qui Mar 12 14:45:21 2015]  [<ffffffff810759d6>] warn_slowpath_fmt+0x46/0x50
  [Qui Mar 12 14:45:21 2015]  [<ffffffffc042e386>] tb_wait_for_port+0x376/0x410 [t
  hunderbolt]
  [Qui Mar 12 14:45:21 2015]  [<ffffffff810ad111>] ? put_prev_entity+0x31/0x430
  [Qui Mar 12 14:45:21 2015]  [<ffffffff815013c3>] ? _dev_info+0x53/0x60
  [Qui Mar 12 14:45:21 2015]  [<ffffffff810135e0>] ? __switch_to+0x150/0x5f0
  [Qui Mar 12 14:45:21 2015]  [<ffffffffc042d667>] tb_scan_port+0x67/0x1c0 [thunde
  rbolt]
  [Qui Mar 12 14:45:21 2015]  [<ffffffffc042d9e1>] tb_handle_hotplug+0x1d1/0x360 [thunderbolt]
  [Qui Mar 12 14:45:21 2015]  [<ffffffff8108eb48>] process_one_work+0x158/0x430
  [Qui Mar 12 14:45:21 2015]  [<ffffffff8108f5db>] worker_thread+0x5b/0x530
  [Qui Mar 12 14:45:21 2015]  [<ffffffff8108f580>] ? rescuer_thread+0x3a0/0x3a0
  [Qui Mar 12 14:45:21 2015]  [<ffffffff81094679>] kthread+0xc9/0xe0
  [Qui Mar 12 14:45:21 2015]  [<ffffffff810945b0>] ? kthread_create_on_node+0x1c0/0x1c0
  [Qui Mar 12 14:45:21 2015]  [<ffffffff817c7a3c>] ret_from_fork+0x7c/0xb0
  [Qui Mar 12 14:45:21 2015]  [<ffffffff810945b0>] ? kthread_create_on_node+0x1c0/0x1c0
  [Qui Mar 12 14:45:21 2015] ---[ end trace ae4c204be5c5e718 ]---
  [Qui Mar 12 14:46:51 2015] Bluetooth: BNEP (Ethernet Emulation) ver 1.3

  
  DRM Crash

  [Qui Mar 12 14:45:23 2015] ------------[ cut here ]------------
  [Qui Mar 12 14:45:23 2015] WARNING: CPU: 0 PID: 536 at /build/buildd/linux-3.19.0/drivers/gpu/drm/i915/intel_audio.c:291 ilk_audio_codec_disable+0x170/0x1b0 [i915]()
  [Qui Mar 12 14:45:23 2015] WARN_ON(!port)
  [Qui Mar 12 14:45:23 2015] Modules linked in:
  [Qui Mar 12 14:45:23 2015]  nls_iso8859_1 btusb bluetooth arc4 brcmsmac cordic joydev brcmutil bcm5974 b43 uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common snd_hda_codec_hdmi videodev mac80211 snd_hda_codec_cirrus snd_hda_codec_generic media cfg80211 ssb intel_rapl snd_hda_intel snd_hda_controller iosf_mbi snd_hda_codec x86_pkg_temp_thermal intel_powerclamp snd_hwdep coretemp snd_pcm kvm_intel kvm crct10dif_pclmul crc32_pclmul snd_seq_midi ghash_clmulni_intel snd_seq_midi_event applesmc input_polldev snd_rawmidi aesni_intel aes_x86_64 lrw gf128mul snd_seq glue_helper ablk_helper cryptd snd_seq_device snd_timer i915 snd thunderbolt lpc_ich bcma drm_kms_helper soundcore drm sbs mei_me mei sbshc mac_hid i2c_algo_bit shpchp video apple_bl parport_pc ppdev lp parport autofs4 hid_generic hid_apple
  [Qui Mar 12 14:45:23 2015]  usbhid hid ahci libahci
  [Qui Mar 12 14:45:23 2015] CPU: 0 PID: 536 Comm: plymouthd Tainted: G        W      3.19.0-9-generic #9-Ubuntu
  [Qui Mar 12 14:45:23 2015] Hardware name: Apple Inc. MacBookAir5,1/Mac-66F35F19FE2A0D05, BIOS MBA51.88Z.00EF.B02.1211271028 11/27/2012
  [Qui Mar 12 14:45:23 2015]  ffffffffc051a4b0 ffff8802647239b8 ffffffff817c09b5 0000000000000007
  [Qui Mar 12 14:45:23 2015]  ffff880264723a08 ffff8802647239f8 ffffffff8107595a 0000000000000086
  [Qui Mar 12 14:45:23 2015]  ffff880262eb0000 00000000fffffeee 0000000030000000 00000000000e50c0
  [Qui Mar 12 14:45:23 2015] Call Trace:
  [Qui Mar 12 14:45:23 2015]  [<ffffffff817c09b5>] dump_stack+0x45/0x57
  [Qui Mar 12 14:45:23 2015]  [<ffffffff8107595a>] warn_slowpath_common+0x8a/0xc0
  [Qui Mar 12 14:45:23 2015]  [<ffffffff810759d6>] warn_slowpath_fmt+0x46/0x50
  [Qui Mar 12 14:45:23 2015]  [<ffffffffc04aba00>] ilk_audio_codec_disable+0x170/0x1b0 [i915]
  [Qui Mar 12 14:45:23 2015]  [<ffffffffc04ac2fe>] intel_audio_codec_disable+0x1e/0x30 [i915]
  [Qui Mar 12 14:45:23 2015]  [<ffffffffc04e3565>] intel_disable_dp+0x75/0xb0 [i915]
  [Qui Mar 12 14:45:23 2015]  [<ffffffffc04bfe4a>] ironlake_crtc_disable+0x15a/0x7b0 [i915]
  [Qui Mar 12 14:45:23 2015]  [<ffffffffc04c1489>] __intel_set_mode+0xa59/0xc80 [i915]
  [Qui Mar 12 14:45:23 2015]  [<ffffffffc04c810b>] intel_crtc_set_config+0xbfb/0xf70 [i915]
  [Qui Mar 12 14:45:23 2015]  [<ffffffffc04c1489>] __intel_set_mode+0xa59/0xc80 [i
  915]
  [Qui Mar 12 14:45:23 2015]  [<ffffffffc04c810b>] intel_crtc_set_config+0xbfb/0xf
  70 [i915]
  [Qui Mar 12 14:45:23 2015]  [<ffffffffc036a926>] drm_mode_set_config_internal+0x
  66/0x100 [drm]
  [Qui Mar 12 14:45:23 2015]  [<ffffffffc036ea03>] drm_mode_setcrtc+0x283/0x580 [d
  rm]
  [Qui Mar 12 14:45:23 2015]  [<ffffffffc035fadf>] drm_ioctl+0x1df/0x680 [drm]
  [Qui Mar 12 14:45:23 2015]  [<ffffffff812077b0>] do_vfs_ioctl+0x2e0/0x4e0
  [Qui Mar 12 14:45:23 2015]  [<ffffffff811afbf8>] ? SyS_mmap_pgoff+0xe8/0x290
  [Qui Mar 12 14:45:23 2015]  [<ffffffff81207a31>] SyS_ioctl+0x81/0xa0
  [Qui Mar 12 14:45:23 2015]  [<ffffffff817c7aed>] system_call_fastpath+0x16/0x1b
  [Qui Mar 12 14:45:23 2015] ---[ end trace ae4c204be5c5e719 ]---
  [Qui Mar 12 14:46:51 2015] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
  [Qui Mar 12 14:46:51 2015] Bluetooth: BNEP filters: protocol multicast
  [Qui Mar 12 14:46:51 2015] Bluetooth: BNEP socket layer initialized
  [Qui Mar 12 14:46:51 2015] Bluetooth: RFCOMM TTY layer initialized

  Resumes normal boot after 90 sec, audio and video are funcional
  --- 
  ApportVersion: 2.16.2-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  accensi    1697 F.... pulseaudio
  CurrentDesktop: XFCE
  DistroRelease: Ubuntu 15.04
  InstallationDate: Installed on 2015-02-04 (36 days ago)
  InstallationMedia: Xubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  MachineType: Apple Inc. MacBookAir5,1
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-9-generic.efi.signed root=UUID=eac2d024-2c90-4e64-a96e-782a883f0c22 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.19.0-9.9-generic 3.19.1
  Tags:  vivid
  Uname: Linux 3.19.0-9-generic x86_64
  UpgradeStatus: Upgraded to vivid on 2015-03-10 (2 days ago)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 11/27/2012
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBA51.88Z.00EF.B02.1211271028
  dmi.board.asset.tag: Base Board Asset Tag#
  dmi.board.name: Mac-66F35F19FE2A0D05
  dmi.board.vendor: Apple Inc.
  dmi.board.version: MacBookAir5,1
  dmi.chassis.type: 10
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-66F35F19FE2A0D05
  dmi.modalias: dmi:bvnAppleInc.:bvrMBA51.88Z.00EF.B02.1211271028:bd11/27/2012:svnAppleInc.:pnMacBookAir5,1:pvr1.0:rvnAppleInc.:rnMac-66F35F19FE2A0D05:rvrMacBookAir5,1:cvnAppleInc.:ct10:cvrMac-66F35F19FE2A0D05:
  dmi.product.name: MacBookAir5,1
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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References

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