** Changed in: linux (Ubuntu)
       Status: In Progress => Fix Released

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  text VTs are unavailable on desktop after upgrade to Ubuntu 17.10

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Artful:
  Fix Released

Bug description:
  == SRU Justification ==
  After upgrading my laptop to Ubuntu 17.10, I am unable to access gettys on 
any of the text-mode VTs on my system.

  gdm3 is running on VT1, my user session is running on VT2.  I can
  switch between these.  If I switch to VT3, I know that the VT switch
  has happened in the kernel because the X cursor disappears; but the
  display retains the output of my X session, and the text console with
  getty never appears.

  Switching back to VT2 works fine.

  The same problem occurs with either Wayland or X.

  My laptop is docked with an external monitor, which could be a factor.
  (I also notice that during boot, plymouth is only rendered on the
  internal monitor, not the external monitor; this may be related).  I
  have not yet tested whether this problem is reproducible if I undock.

  The system is booting with vt.handoff=7, which I believe is still the
  default in Ubuntu 17.10.

  This bug is a regression in Artful introduced by mainline commit:
  7581d5ca2bb ("drm/i915/fbdev: Check for existence of ifbdev->vma before 

  It was first found that this bug was fixed in v4.14-rc1.  However, after a 
  "Reverse" bisect, the exact commit could not be identified.  This is because 
  fix came in via a merge base.  A regular bisect was then done to identify 
  7581d5ca2bb as the offending commit that introduced the bug.  Using the file 
  that this commit touched, a "Reverse" bisect was done again between
  7581d5ca2bb..v4.14-rc1.  This identified the following commit 88be58be886f as 
  the fix to this regression.

  == Fix ==
  commit 88be58be886f1215cc73dc8c273c985eecd7385c
  Author: Daniel Vetter <daniel.vet...@ffwll.ch>
  Date:   Thu Jul 6 15:00:19 2017 +0200

      drm/i915/fbdev: Always forward hotplug events

  == Regression Potential ==
  This patch fixes a current regression and is a minor one-liner.

  == Test Case ==
  A test kernel was built with this patch and tested by the original bug 
  The bug reporter states the test kernel resolved the bug.

  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: linux-image-4.13.0-16-generic 4.13.0-16.19
  ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
  Uname: Linux 4.13.0-16-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
  ApportVersion: 2.20.7-0ubuntu3
  Architecture: amd64
   /dev/snd/controlC1:  vorlon    24080 F.... pulseaudio
   /dev/snd/controlC0:  vorlon    24080 F.... pulseaudio
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Oct 19 09:57:59 2017
  HibernationDevice: RESUME=UUID=6df76279-19ea-45a4-bec9-e4fdc858729a
  InstallationDate: Installed on 2010-09-24 (2582 days ago)
  InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 
  MachineType: LENOVO 2306CTO
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.13.0-16-generic.efi.signed 
root=/dev/mapper/hostname-root ro quiet splash vt.handoff=7
   linux-restricted-modules-4.13.0-16-generic N/A
   linux-backports-modules-4.13.0-16-generic  N/A
   linux-firmware                             1.169
   0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: Upgraded to artful on 2017-10-19 (0 days ago)
  dmi.bios.date: 10/25/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: G2ET97WW (2.57 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 2306CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.product.family: ThinkPad X230
  dmi.product.name: 2306CTO
  dmi.product.version: ThinkPad X230
  dmi.sys.vendor: LENOVO

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