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[V B <valentin.brasov@xxxxxxxxx>]

I installed again the 4.2 kernel yesterday after lunch and it happened
again at 16:52:02. You can see the kernel messages at that time in
syslog below:

  13143 Mar  8 16:14:44 my-ubuntu compiz: pam_ecryptfs: seteuid error
  13144 Mar  8 16:17:01 my-ubuntu CRON[10531]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
  13145 Mar  8 15:18:38 my-ubuntu avahi-daemon[865]: Invalid response packet from host fe80::6e40:8ff:fe8c:be7a.
  13146 Mar  8 16:40:41 my-ubuntu avahi-daemon[865]: Invalid response packet from host fe80::6a5b:35ff:febd:7254.
  13147 Mar  8 16:50:02 my-ubuntu kernel: [ 8849.220446] [drm] HPD interrupt storm detected on connector HDMI-A-1: switching from hotplug detection to polling
  13148 Mar  8 16:52:02 my-ubuntu kernel: [ 8969.150065] BUG: unable to handle kernel NULL pointer dereference at 00000000000000d4
  13149 Mar  8 16:52:02 my-ubuntu kernel: [ 8969.150111] IP: [<ffffffffc02d5457>] intel_hpd_irq_reenable_work+0xa7/0x150 [i915]
  13150 Mar  8 16:52:02 my-ubuntu kernel: [ 8969.150205] PGD c912b067 PUD c912a067 PMD 0 
  13151 Mar  8 16:52:02 my-ubuntu kernel: [ 8969.150231] Oops: 0000 [#1] SMP 
  13152 Mar  8 16:52:02 my-ubuntu kernel: [ 8969.150247] Modules linked in: uas usb_storage btrfs xor raid6_pq ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c xt_conntrac
  13152 k xt_addrtype br_netfilter aufs xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack xt_tcpud
  13152 p bridge stp llc iptable_filter ip_tables x_tables cmac snd_hda_codec_realtek snd_hda_codec_hdmi snd_hda_codec_generic pn544_mei mei_phy pn544 hci nfc bnep snd_hda_intel uvcvideo vid
  13152 eobuf2_vmalloc snd_hda_codec wl(POE) videobuf2_memops videobuf2_core dell_laptop btusb dell_wmi snd_hda_core dcdbas snd_usb_audio intel_rapl sparse_keymap x86_pkg_temp_thermal rfcomm
  13152  btrtl intel_powerclamp btbcm snd_seq_midi snd_usbmidi_lib v4l2_common coretemp btintel snd_hwdep videodev snd_seq_midi_event bluetooth kvm_intel snd_pcm snd_rawmidi asix kvm media u
  13152 sbnet mii snd_seq snd_seq_device cfg80211 snd_timer rtsx_pci_ms input_leds memstick joydev snd serio_raw mei_me soundcore shpchp mei ie31200_edac edac_core lpc_ich binfmt_misc nls_is
  13152 o8859_1 acpi_als kfifo_buf industrialio int3403_thermal parport_pc ppdev dell_rbtn dell_smo8800 int3400_thermal processor_thermal_device int3402_thermal acpi_thermal_rel intel_soc_dt
  13152 s_iosf int340x_thermal_zone mac_hid lp parport drbg ansi_cprng dm_crypt hid_generic usbhid hid rtsx_pci_sdmmc nouveau i915 crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf
  13152 128mul glue_helper mxm_wmi ttm ablk_helper i2c_algo_bit cryptd drm_kms_helper psmouse ahci drm libahci rtsx_pci video wmi
  13153 Mar  8 16:52:02 my-ubuntu kernel: [ 8969.150825] CPU: 0 PID: 10468 Comm: kworker/0:4 Tainted: P           OE   4.2.0-30-generic #36~14.04.1-Ubuntu
  13154 Mar  8 16:52:02 my-ubuntu kernel: [ 8969.150859] Hardware name: Dell Inc. XPS 15 9530/XPS 15 9530, BIOS A09 07/30/2015
  13155 Mar  8 16:52:02 my-ubuntu kernel: [ 8969.150922] Workqueue: events intel_hpd_irq_reenable_work [i915]
  13156 Mar  8 16:52:02 my-ubuntu kernel: [ 8969.150943] task: ffff880050820000 ti: ffff880284870000 task.ti: ffff880284870000
  13157 Mar  8 16:52:02 my-ubuntu kernel: [ 8969.150966] RIP: 0010:[<ffffffffc02d5457>]  [<ffffffffc02d5457>] intel_hpd_irq_reenable_work+0xa7/0x150 [i915]
  13158 Mar  8 16:52:02 my-ubuntu kernel: [ 8969.151020] RSP: 0000:ffff880284873da8  EFLAGS: 00010002
  13159 Mar  8 16:52:02 my-ubuntu kernel: [ 8969.151037] RAX: 0000000000000000 RBX: ffff880416c20800 RCX: ffff88041cdfbb38
  13160 Mar  8 16:52:02 my-ubuntu kernel: [ 8969.151062] RDX: ffff880416c20818 RSI: 0000000000000202 RDI: ffff8804172d7b08
  13161 Mar  8 16:52:02 my-ubuntu kernel: [ 8969.151085] RBP: ffff880284873df8 R08: 0000000000000001 R09: 0000000000000000
  13162 Mar  8 16:52:02 my-ubuntu kernel: [ 8969.151107] R10: ffff88041cdfb800 R11: 0000000000000005 R12: 0000000000000004
  13163 Mar  8 16:52:02 my-ubuntu kernel: [ 8969.151130] R13: ffff8804172d0000 R14: ffff8804172d7cc0 R15: ffff8804172d7c84
  13164 Mar  8 16:52:02 my-ubuntu kernel: [ 8969.151152] FS:  0000000000000000(0000) GS:ffff88042fa00000(0000) knlGS:0000000000000000
  13165 Mar  8 16:52:02 my-ubuntu kernel: [ 8969.151177] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  13166 Mar  8 16:52:02 my-ubuntu kernel: [ 8969.151196] CR2: 00000000Mar  9 06:49:01 my-ubuntu rsyslogd: [origin software="rsyslogd" swVersion="7.4.4" x-pid="885" x-
  13166 info="http://www.rsyslog.com";] start
  13167 Mar  9 06:49:01 my-ubuntu rsyslogd: rsyslogd's groupid changed to 104
  13168 Mar  9 06:49:01 my-ubuntu rsyslogd: rsyslogd's userid changed to 101

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1552333

Title:
  After upgrade to 4.2 kernel Ubuntu 14.04 LTS randomly freezes
  completely

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I am not sure whether this is related to Xorg because of following:

  Today it happened a few times this complete freeze. Before today never
  happened. Today I did a normal system update in the morning, then a
  ditro upgrade which just upgraded a few unimportant packages, then the
  first freeze happened. Later I upgraded the kernel from 3.19.0 to
  4.2.0 and after that a few more freezes happened. I attached the apt
  log generated today and including the last update yesterday:
  apt_log_for_day_with_upgrade_to_kernel4.2.log. Each time this
  happened, before freeze I saw in the log something like:

     9492 Mar  2 14:00:08 my-ubunty kernel: [ 2514.659171] [drm] HPD
  interrupt storm detected on connector HDMI-A-1: switching from hotplug
  detection to polling

  And once or twice I saw right after that something like:

     9493 Mar  2 14:01:13 my-ubuntu compiz: pam_ecryptfs: seteuid error
  Then some binary content

  I also use disk encryption (the one from Ubuntu).

  Each time the freezing happened, the mouse and keyboard weer dead and
  the screen was frozen in whatever content was displaying at that
  point. So the only think I could do is to press the power button for 5
  seconds.

  I upgraded from 3.19 kernel (linux-generic-lts-vivid) as follows:
  $ sudo apt-get update
  $ sudo apt-get install linux-generic-lts-wily

  Thank you.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: xorg 1:7.7+1ubuntu8.1
  ProcVersionSignature: Ubuntu 4.2.0-30.36~14.04.1-generic 4.2.8-ckt3
  Uname: Linux 4.2.0-30-generic x86_64
  NonfreeKernelModules: wl
  .tmp.unity.support.test.0:

  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  CurrentDesktop: Unity
  Date: Wed Mar  2 16:35:13 2016
  DistUpgraded: Fresh install
  DistroCodename: trusty
  DistroVariant: ubuntu
  DkmsStatus:
   bcmwl, 6.30.223.248+bdcom, 3.19.0-51-generic, x86_64: installed
   bcmwl, 6.30.223.248+bdcom, 4.2.0-30-generic, x86_64: installed
  EcryptfsInUse: Yes
  GpuHangFrequency: Several times a day
  GpuHangReproducibility: Seems to happen randomly
  GpuHangStarted: Today
  GraphicsCard:
   Intel Corporation 4th Gen Core Processor Integrated Graphics Controller [8086:0416] (rev 06) (prog-if 00 [VGA controller])
     Subsystem: Dell Device [1028:05fe]
     Subsystem: Dell Device [1028:05fe]
  InstallationDate: Installed on 2015-09-28 (156 days ago)
  InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
  MachineType: Dell Inc. XPS 15 9530
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.2.0-30-generic root=/dev/mapper/ubuntu--vg-root ro cgroup_enable=memory swapaccount=1 quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  Title: Xorg freeze
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/15/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A07
  dmi.board.name: XPS 15 9530
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A07
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: Not Specified
  dmi.modalias: dmi:bvnDellInc.:bvrA07:bd10/15/2014:svnDellInc.:pnXPS159530:pvrA07:rvnDellInc.:rnXPS159530:rvrA07:cvnDellInc.:ct8:cvrNotSpecified:
  dmi.product.name: XPS 15 9530
  dmi.product.version: A07
  dmi.sys.vendor: Dell Inc.
  version.compiz: compiz 1:0.9.11.3+14.04.20150313-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.64-1~ubuntu14.04.1
  version.libgl1-mesa-dri: libgl1-mesa-dri N/A
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx N/A
  version.xserver-xorg-core: xserver-xorg-core N/A
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
  version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A
  xserver.bootTime: Wed Mar  2 16:15:49 2016
  xserver.configfile: default
  xserver.errors:
   Failed to load module "nvidia" (module does not exist, 0)
   Failed to load module "nvidia" (module does not exist, 0)
   NOUVEAU(G0): Failed to initialise context object: 2D_NVC0 (0)
   NOUVEAU(G0): Error initialising acceleration.  Falling back to NoAccel
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:

  xserver.version: 2:1.17.1-0ubuntu3.1~trusty1

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