kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

James, this bug was reported a while ago and there hasn't been any
activity in it recently. We were wondering if this is still an issue? If
so, could you please test for this with the latest development release
of Ubuntu? ISO images are available from http://cdimage.ubuntu.com
/daily-live/current/ .

If it remains an issue, could you please run the following command in
the development release from a Terminal
(Applications->Accessories->Terminal), as it will automatically gather
and attach updated debug information to this report:

apport-collect -p linux <replace-with-bug-number>

** This bug is no longer a duplicate of bug 978891
   ubuntu 12.04 doesn't boot when usb device plugged in (except usb mouse)

** Package changed: ubuntu => linux (Ubuntu)

** Changed in: linux (Ubuntu)
       Status: Confirmed => Incomplete

** Tags added: needs-kernel-logs needs-upstream-testing precise

-- 
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/963933

Title:
  System freeze when hotplug 27" monitor in Ubuntu 12.04

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  I'm not sure if this is a bug yet, hence the question.

  I have a Dell XPS 17" laptop (1920x1080 resolution) and recently got a
  new Dell 27" monitor (2560x1440 res). The laptop has an nVidia
  discrete card, but I don't actually have it set up (i.e. I haven't got
  around to successfully setting up Bumblebee yet), so I'm assuming this
  is all on the Intel card. The external monitor is connected via a Mini
  Display Port to Dual-Link DVI (the Apple branded one) adapter, then
  via DVI cable to the monitor (it's all I have around that works).

  If I boot the laptop with the external monitor connected, everything
  works perfectly (except the login screen goes very low res, but I can
  live with that). However, if I unplug it while connected, the display
  will go black with the mouse cursor still visible, and completely lock
  up. Caps lock does not go on/off, will not respond to SysRq,
  Ctrl+Alt+Del, switching to a different terminal (Ctrl+Alt+F1 etc.).
  Only a hard reboot will do the job.

  The same happens in all these scenarios:
  - Unplugging the monitor when booted with it connected
  - "Hot" plugging the monitor after booted
  - Hitting "Apply" after making changes in System Settings > Display (e.g. if I try to move the monitor positions around)

  It's not a show stopper for me, I just must be careful not to do the
  above, which can be inconvenient sometimes.

  I am not sure where to even start looking, /var/log/syslog does not
  seem to contain any useful information, nor does /var/log/dmesg.0 or
  /var/log/Xorg.0.log

  If I boot from cold with the monitor attached, and avoid the Display
  settings, everything works perfectly - correct resolution etc.

  System details follow:

  $ cat /etc/lsb-release 
  DISTRIB_ID=Ubuntu
  DISTRIB_RELEASE=12.04
  DISTRIB_CODENAME=precise
  DISTRIB_DESCRIPTION="Ubuntu precise (development branch)"

  
  $ lspci | grep -i vga
  00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
  01:00.0 VGA compatible controller: NVIDIA Corporation Device 124d (rev ff)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/963933/+subscriptions