[Bug 1637629] [NEW] monitors become unavailable after blanking

[Kevin O'Gorman]

Public bug reported:

My monitors become unavailable and hard to configure after blanking, or
switching to a different input, let alone unplugging.

I can boot into 14.04 and do not see this problem.  It is present in
16.04.  I did not use the releases in between on this system.

It is a core-i7 machine, so the graphics is Intel and is on the
motherboard.  I'm using all three of the outputs provided by my
Z97-Deluxe mobo.  I have had to disable blanking because otherwise I
will definitely have at least one monitor no longer active when I wake
up the system.  Getting it active again requires a number, at least 3,
of attempts to "use this monitor" in the Display widget. plus un-
mirroring and putting it back in its proper place.

This also happens if I switch the monitors to using another input, which
I wanted to do because I have two systems and I'd like to switch the
monitors between them.  I'm having to use a workspace of ssh+tmux
instances instead, which has some drawbacks of its own, but is at least
workable.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: apport 2.20.1-0ubuntu2.1
ProcVersionSignature: Ubuntu 4.4.0-45.66-generic 4.4.21
Uname: Linux 4.4.0-45-generic x86_64
NonfreeKernelModules: wl
ApportLog:
 
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: XFCE
Date: Fri Oct 28 12:50:37 2016
InstallationDate: Installed on 2016-08-08 (80 days ago)
InstallationMedia: Xubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
PackageArchitecture: all
SourcePackage: apport
UpgradeStatus: No upgrade log present (probably fresh install)

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


** Tags: amd64 apport-bug xenial

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https://bugs.launchpad.net/bugs/1637629

Title:
  monitors become unavailable after blanking

Status in apport package in Ubuntu:
  New

Bug description:
  My monitors become unavailable and hard to configure after blanking,
  or switching to a different input, let alone unplugging.

  I can boot into 14.04 and do not see this problem.  It is present in
  16.04.  I did not use the releases in between on this system.

  It is a core-i7 machine, so the graphics is Intel and is on the
  motherboard.  I'm using all three of the outputs provided by my
  Z97-Deluxe mobo.  I have had to disable blanking because otherwise I
  will definitely have at least one monitor no longer active when I wake
  up the system.  Getting it active again requires a number, at least 3,
  of attempts to "use this monitor" in the Display widget. plus un-
  mirroring and putting it back in its proper place.

  This also happens if I switch the monitors to using another input,
  which I wanted to do because I have two systems and I'd like to switch
  the monitors between them.  I'm having to use a workspace of ssh+tmux
  instances instead, which has some drawbacks of its own, but is at
  least workable.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: apport 2.20.1-0ubuntu2.1
  ProcVersionSignature: Ubuntu 4.4.0-45.66-generic 4.4.21
  Uname: Linux 4.4.0-45-generic x86_64
  NonfreeKernelModules: wl
  ApportLog:
   
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Fri Oct 28 12:50:37 2016
  InstallationDate: Installed on 2016-08-08 (80 days ago)
  InstallationMedia: Xubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  PackageArchitecture: all
  SourcePackage: apport
  UpgradeStatus: No upgrade log present (probably fresh install)

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