Public bug reported:

Using "ubuntu-gnome-desktop"  ("vanilla-gnome-desktop" also installed)
with external 1600x1200 monitor rotated 90 deg. Monitor connected via
HDMI and using Inel i915 driver.

1) Login to "Ubuntu" session. Use Settings -> Display to rotate monitor 90 deg 
left. Accept new settings. Logout.
2) Login to "Ubuntu on Wayland" External monitor gets no signal. 
Following line at the end of 'dmesg' output seems to relate to the issue:
Dec 12 14:37:46 saugage gnome-shell[6125]: Failed to set CRTC mode 1600x1200: 
No space left on device

Searching for this message reveals several reports of Gnome Shell
crashing at this point. It does not crash for me but the external
monitor remains unusable.

hbarta@saugage:/var/log$ lsb_release -rd
Description:    Ubuntu 18.04.1 LTS
Release:        18.04
hbarta@saugage:/var/log$

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gnome-shell 3.28.3-0ubuntu0.18.04.3
ProcVersionSignature: Ubuntu 4.15.0-42.45-generic 4.15.18
Uname: Linux 4.15.0-42-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Wed Dec 12 14:44:42 2018
DisplayManager: gdm3
GsettingsChanges:
 b'org.gnome.shell' b'command-history' redacted by apport
 b'org.gnome.shell' b'favorite-apps' redacted by apport
 b'org.gnome.desktop.interface' b'gtk-im-module' b"'gtk-im-context-simple'"
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US
 SHELL=/bin/bash
SourcePackage: gnome-shell
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: gnome-shell (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic wayland-session

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to gnome-shell in Ubuntu.
https://bugs.launchpad.net/bugs/1808226

Title:
  rotated screen is blank

Status in gnome-shell package in Ubuntu:
  New

Bug description:
  Using "ubuntu-gnome-desktop"  ("vanilla-gnome-desktop" also installed)
  with external 1600x1200 monitor rotated 90 deg. Monitor connected via
  HDMI and using Inel i915 driver.

  1) Login to "Ubuntu" session. Use Settings -> Display to rotate monitor 90 
deg left. Accept new settings. Logout.
  2) Login to "Ubuntu on Wayland" External monitor gets no signal. 
  Following line at the end of 'dmesg' output seems to relate to the issue:
  Dec 12 14:37:46 saugage gnome-shell[6125]: Failed to set CRTC mode 1600x1200: 
No space left on device

  Searching for this message reveals several reports of Gnome Shell
  crashing at this point. It does not crash for me but the external
  monitor remains unusable.

  hbarta@saugage:/var/log$ lsb_release -rd
  Description:  Ubuntu 18.04.1 LTS
  Release:      18.04
  hbarta@saugage:/var/log$

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: gnome-shell 3.28.3-0ubuntu0.18.04.3
  ProcVersionSignature: Ubuntu 4.15.0-42.45-generic 4.15.18
  Uname: Linux 4.15.0-42-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.9-0ubuntu7.5
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Wed Dec 12 14:44:42 2018
  DisplayManager: gdm3
  GsettingsChanges:
   b'org.gnome.shell' b'command-history' redacted by apport
   b'org.gnome.shell' b'favorite-apps' redacted by apport
   b'org.gnome.desktop.interface' b'gtk-im-module' b"'gtk-im-context-simple'"
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US
   SHELL=/bin/bash
  SourcePackage: gnome-shell
  UpgradeStatus: No upgrade log present (probably fresh install)

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https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1808226/+subscriptions

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