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[Bug 1542939] Re: system freeze after vt switching

 

This is affecting an increasing set of users; for instance, it seems to
be the underlying problem in bug 1545238. My Thinkpad X220 is also
showing the same problem, which suggests multiple Intel graphics systems
may be affected.

See upstream bugs: https://bugzilla.kernel.org/show_bug.cgi?id=92171 and
https://bugs.freedesktop.org/show_bug.cgi?id=89108

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

** Bug watch added: Linux Kernel Bug Tracker #92171
   http://bugzilla.kernel.org/show_bug.cgi?id=92171

** Bug watch added: freedesktop.org Bugzilla #89108
   https://bugs.freedesktop.org/show_bug.cgi?id=89108

** Bug watch added: freedesktop.org Bugzilla #93509
   https://bugs.freedesktop.org/show_bug.cgi?id=93509

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https://bugs.launchpad.net/bugs/1542939

Title:
  system freeze after vt switching

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I'm trying to use the ctrl+alt+1 to switch to a terminal - ok,
  after switching back by  ctrl+alt+7 the system freeze

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-3-generic 4.4.0-3.17
  ProcVersionSignature: Ubuntu 4.4.0-3.17-generic 4.4.1
  Uname: Linux 4.4.0-3-generic x86_64
  ApportVersion: 2.19.4-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  stinger    1644 F.... pulseaudio
  Date: Sun Feb  7 22:27:42 2016
  HibernationDevice: RESUME=UUID=888e93f3-1a7d-4bf8-a00d-cea6a759d03a
  InstallationDate: Installed on 2015-11-12 (87 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20151112)
  Lsusb:
   Bus 002 Device 003: ID 24ae:2000  
   Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
   Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: ASUSTeK Computer Inc. P53E
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-3-generic root=UUID=9ad09333-ac7d-4b10-99a0-1e598daa4753 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-3-generic N/A
   linux-backports-modules-4.4.0-3-generic  N/A
   linux-firmware                           1.155
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 03/15/2012
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: P53E.209
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: P53E
  dmi.board.vendor: ASUSTeK Computer Inc.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK Computer Inc.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP53E.209:bd03/15/2012:svnASUSTeKComputerInc.:pnP53E:pvr1.0:rvnASUSTeKComputerInc.:rnP53E:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
  dmi.product.name: P53E
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK Computer Inc.

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References