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[V B <valentin.brasov@xxxxxxxxx>]

Public bug reported:

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.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

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

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

Status in linux package in Ubuntu:
  New

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.

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