Kevin Dalley:

1) To advise, you will not want to manually attach crash reports. This
is due to how they may contain sensitive information you would not want
to release publicly.

2) Regarding those crash reports, in order to process them automatically and in 
a privacy respectful way, it is best to execute the following via a terminal on 
each crash report:
ubuntu-bug /var/crash/FILENAME.crash

where FILENAME is replaced with the actual file name.

3) Regarding i915.i915_enable_rc6=1 could you please advise to:
* Why you were using it to begin with?
* Now that you removed it, do you have more/less/same issues?

4) To rule out left over update cruft and self-compiled programs, could
you please test http://cdimage.ubuntu.com/daily-live/current/ and advise
to the results?

** Attachment removed: 
"/var/crash/_usr_lib_gnome-initial-setup_gnome-initial-setup.1000.crash"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1770306/+attachment/5144845/+files/_usr_lib_gnome-initial-setup_gnome-initial-setup.1000.crash

** Attachment removed: "/var/crash/_usr_sbin_unity-greeter.119.crash"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1770306/+attachment/5144823/+files/_usr_sbin_unity-greeter.119.crash

** Attachment removed: "/var/crash/_usr_bin_xfce4-power-manager.1000.crash"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1770306/+attachment/5144822/+files/_usr_bin_xfce4-power-manager.1000.crash

** Attachment removed: "/var/crash/_usr_bin_plasmashell.1000.crash"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1770306/+attachment/5144821/+files/_usr_bin_plasmashell.1000.crash

** Attachment removed: "/var/crash/_usr_bin_kwin_wayland.1000.crash"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1770306/+attachment/5144820/+files/_usr_bin_kwin_wayland.1000.crash

** Attachment removed: "/var/crash/_usr_bin_ksplashqml.1000.crash"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1770306/+attachment/5144819/+files/_usr_bin_ksplashqml.1000.crash

** Description changed:

  I can manually start lightdm, and that will give me a login screen,
  
  Unfortunately, most of the desktop environments crash after login.
  
  Only plasma gives me a little bit of clients, though even plasma
  complains
  
  All shell packages missing
  And
  Vboxclient warning
  
  Under 17.10, I successfully used Wayland
+ 
+ WORKAROUND: Use GNOME Flashback (Metacity).
  
  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: xorg 1:7.7+19ubuntu7
  ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
  Uname: Linux 4.15.0-20-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.20.9-0ubuntu7
  Architecture: amd64
  CompizPlugins: 
[core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
  Date: Wed May  9 19:15:12 2018
  DistUpgraded: Fresh install
  DistroCodename: bionic
  DistroVariant: ubuntu
  EcryptfsInUse: Yes
  ExtraDebuggingInterest: Yes
  GraphicsCard:
-  Intel Corporation HD Graphics 5500 [8086:1616] (rev 09) (prog-if 00 [VGA 
controller])
-    Subsystem: Dell HD Graphics 5500 [1028:0665]
+  Intel Corporation HD Graphics 5500 [8086:1616] (rev 09) (prog-if 00 [VGA 
controller])
+    Subsystem: Dell HD Graphics 5500 [1028:0665]
  InstallationDate: Installed on 2015-05-18 (1087 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  MachineType: Dell Inc. XPS 13 9343
  ProcEnviron:
-  TERM=linux
-  PATH=(custom, no user)
-  XDG_RUNTIME_DIR=<set>
-  LANG=en_US.UTF-8
-  SHELL=/bin/bash
+  TERM=linux
+  PATH=(custom, no user)
+  XDG_RUNTIME_DIR=<set>
+  LANG=en_US.UTF-8
+  SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic 
root=/dev/mapper/ubuntu--vg-root ro persistent quiet splash 
i915.i915_enable_rc6=1 vt.handoff=1
  SourcePackage: xorg
  Symptom: display
  Title: Xorg crash
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/23/2018
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A15
  dmi.board.name: 0310JH
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvrA15:bd01/23/2018:svnDellInc.:pnXPS139343:pvr:rvnDellInc.:rn0310JH:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: XPS 13 9343
  dmi.sys.vendor: Dell Inc.
  version.compiz: compiz 1:0.9.13.1+18.04.20180302-0ubuntu1
  version.libdrm2: libdrm2 2.4.91-2
  version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.0~rc5-1ubuntu1
  version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.0~rc5-1ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.5-1ubuntu1
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20171229-1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1770306

Title:
  X display is black after 18.04 upgrade from 17.10

Status in xorg package in Ubuntu:
  Incomplete

Bug description:
  I can manually start lightdm, and that will give me a login screen,

  Unfortunately, most of the desktop environments crash after login.

  Only plasma gives me a little bit of clients, though even plasma
  complains

  All shell packages missing
  And
  Vboxclient warning

  Under 17.10, I successfully used Wayland

  WORKAROUND: Use GNOME Flashback (Metacity).

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: xorg 1:7.7+19ubuntu7
  ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
  Uname: Linux 4.15.0-20-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.20.9-0ubuntu7
  Architecture: amd64
  CompizPlugins: 
[core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
  Date: Wed May  9 19:15:12 2018
  DistUpgraded: Fresh install
  DistroCodename: bionic
  DistroVariant: ubuntu
  EcryptfsInUse: Yes
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Intel Corporation HD Graphics 5500 [8086:1616] (rev 09) (prog-if 00 [VGA 
controller])
     Subsystem: Dell HD Graphics 5500 [1028:0665]
  InstallationDate: Installed on 2015-05-18 (1087 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  MachineType: Dell Inc. XPS 13 9343
  ProcEnviron:
   TERM=linux
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic 
root=/dev/mapper/ubuntu--vg-root ro persistent quiet splash 
i915.i915_enable_rc6=1 vt.handoff=1
  SourcePackage: xorg
  Symptom: display
  Title: Xorg crash
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/23/2018
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A15
  dmi.board.name: 0310JH
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvrA15:bd01/23/2018:svnDellInc.:pnXPS139343:pvr:rvnDellInc.:rn0310JH:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: XPS 13 9343
  dmi.sys.vendor: Dell Inc.
  version.compiz: compiz 1:0.9.13.1+18.04.20180302-0ubuntu1
  version.libdrm2: libdrm2 2.4.91-2
  version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.0~rc5-1ubuntu1
  version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.0~rc5-1ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.5-1ubuntu1
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20171229-1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2

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