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[V B <valentin.brasov@xxxxxxxxx>]

** Summary changed:

- Kernel 3.19.0-58 freezes Ubuntu 14.04 on Dell Inc. XPS 15 9530
+ Kernel 3.19.0-58 freezes Ubuntu 14.04 on Dell XPS 15 9530

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https://bugs.launchpad.net/bugs/1567237

Title:
  Kernel 3.19.0-58 freezes Ubuntu 14.04 on Dell XPS 15 9530

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  The latest security patch for  3.19.0 for Ubuntu 14.04 started
  freezing my laptop (Dell Inc. XPS 15 9530). All the patches before
  this one for the kernel 3.19.0 for Ubuntu 14.04 were OK. From log, the
  last message before freezing was "kernel: ...[drm] HPD interrupt storm
  detected on connector HDMI-A-1: switching from hotplug detection to
  polling", as you can see below:

  Apr 6 14:46:17 xxx-ubuntu dbus[1001]: [system] Activating service name='org.freedesktop.hostname1' (using servicehelper)
  Apr 6 14:46:17 xxx-ubuntu dbus[1001]: [system] Successfully activated service 'org.freedesktop.hostname1'
  Apr 6 14:46:17 xxx-ubuntu kernel: [ 945.147481] systemd-hostnamed[11982]: Warning: nss-myhostname is not installed. Changing the local hostname might make it unresolveable. Plea
  se install nss-myhostname!
  Apr 6 14:50:36 xxx-ubuntu sudo: pam_ecryptfs: pam_sm_authenticate: /home/xxx is already mounted
  Apr 6 15:00:01 xxx-ubuntu CRON[12829]: (root) CMD (if [ -x /usr/sbin/backupninja ]; then /usr/sbin/backupninja; fi)
  Apr 6 15:02:29 xxx-ubuntu kernel: [ 1916.954839] sound hdaudioC0D0: HDMI: ELD buf size is 0, force 128
  Apr 6 15:02:29 xxx-ubuntu kernel: [ 1916.954877] sound hdaudioC0D0: HDMI: invalid ELD data byte 0
  Apr 6 15:07:35 xxx-ubuntu kernel: [ 2222.796696] [drm] HPD interrupt storm detected on connector HDMI-A-1: switching from hotplug detection to polling

  This is the same symptom as described in the bug
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1552333, which is
  a bug raised for 4.2 kernel running on Ubuntu 14.04 using the same
  laptop and the same Ubuntu installation as for this bug.

  At the moment I switched back to kernel 3.19.0-51 that does not cause this problem, but the possibility that from now on all future security patches for 3.19.0 might freeze my laptop sounds very bad.
  --- 
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  valentinbrasov   3187 F.... pulseaudio
   /dev/snd/controlC2:  valentinbrasov   3187 F.... pulseaudio
   /dev/snd/controlC0:  valentinbrasov   3187 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 14.04
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2015-09-28 (192 days ago)
  InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
  MachineType: Dell Inc. XPS 15 9530
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-51-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro cgroup_enable=memory swapaccount=1 quiet splash crashkernel=384M-:128M vt.handoff=7
  ProcVersionSignature: Ubuntu 3.19.0-51.58~14.04.1-generic 3.19.8-ckt13
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-51-generic N/A
   linux-backports-modules-3.19.0-51-generic  N/A
   linux-firmware                             1.127.20
  Tags:  trusty
  Uname: Linux 3.19.0-51-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip docker lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 07/30/2015
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A09
  dmi.board.name: XPS 15 9530
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A09
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: Not Specified
  dmi.modalias: dmi:bvnDellInc.:bvrA09:bd07/30/2015:svnDellInc.:pnXPS159530:pvrA09:rvnDellInc.:rnXPS159530:rvrA09:cvnDellInc.:ct8:cvrNotSpecified:
  dmi.product.name: XPS 15 9530
  dmi.product.version: A09
  dmi.sys.vendor: Dell Inc.

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