Judging by linux-image-4.15.0-46-generic.259292.crash, it appears a
kernel crash in the nouveau driver is the problem here.

If you are able and willing to disable the Nvidia GPU in your system
BIOS then you might find that also works around the problem.

A different solution would likely to be to install the proprietary
Nvidia driver instead:

  sudo apt install nvidia-driver-390


** Summary changed:

- After Ubuntu Base update tp 4.15.0-46-generic computer freezes after login
+ [nouveau] After Ubuntu Base update tp 4.15.0-46-generic computer freezes 
after login

** Package changed: xorg (Ubuntu) => xorg-server (Ubuntu)

** Tags added: nouveau

** Package changed: xorg-server (Ubuntu) => xserver-xorg-video-nouveau
(Ubuntu)

** Also affects: linux (Ubuntu)
   Importance: Undecided
       Status: New

-- 
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https://bugs.launchpad.net/bugs/1818899

Title:
  [nouveau] After Ubuntu Base update tp 4.15.0-46-generic computer
  freezes after login

Status in linux package in Ubuntu:
  New
Status in xserver-xorg-video-nouveau package in Ubuntu:
  New

Bug description:
  I can boot to login, but if I input correct information it freezes. If
  I boot in recovery mode and choose to resume boot, I can login. But my
  external display doesn't register. If I choose the failsafeX version
  there is an error text related to xorg.

  I have not had any problems before on this terminal. It came when I
  let the system update and reboot.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: xorg 1:7.7+19ubuntu7.1
  ProcVersionSignature: Ubuntu 4.15.0-45.48-generic 4.15.18
  Uname: Linux 4.15.0-45-generic x86_64
  .tmp.unity_support_test.1:
   
  ApportVersion: 2.20.9-0ubuntu7.5
  Architecture: amd64
  CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: None
  CurrentDesktop: ubuntu:GNOME
  Date: Wed Mar  6 20:26:56 2019
  DistUpgraded: Fresh install
  DistroCodename: bionic
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes, if not too technical
  GpuHangFrequency: This is the first time
  GraphicsCard:
   Intel Corporation Device [8086:591b] (rev 04) (prog-if 00 [VGA controller])
     Subsystem: Acer Incorporated [ALI] Device [1025:119b]
   NVIDIA Corporation GP107M [GeForce GTX 1050 Mobile] [10de:1c8d] (rev a1) 
(prog-if 00 [VGA controller])
     Subsystem: Acer Incorporated [ALI] GP107M [GeForce GTX 1050 Mobile] 
[1025:1197]
  InstallationDate: Installed on 2018-11-26 (100 days ago)
  InstallationMedia: Ubuntu 16.04.5 LTS "Xenial Xerus" - Release amd64 
(20180731)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 1bcf:2ca0 Sunplus Innovation Technology Inc. 
   Bus 001 Device 002: ID 04ca:3016 Lite-On Technology Corp. 
   Bus 001 Device 004: ID 04f3:0c03 Elan Microelectronics Corp. 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Acer Aspire A715-71G
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-45-generic 
root=UUID=06e8310e-d1a9-42d8-a804-841358355e74 ro recovery nomodeset
  SourcePackage: xorg
  Symptom: display
  Title: Xorg freeze
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/22/2017
  dmi.bios.vendor: Insyde Corp.
  dmi.bios.version: V1.10
  dmi.board.asset.tag: Type2 - Board Serial Number
  dmi.board.name: Charmeleon_KLS
  dmi.board.vendor: KBL
  dmi.board.version: V1.10
  dmi.chassis.type: 10
  dmi.chassis.vendor: Acer
  dmi.chassis.version: V1.10
  dmi.modalias: 
dmi:bvnInsydeCorp.:bvrV1.10:bd08/22/2017:svnAcer:pnAspireA715-71G:pvrV1.10:rvnKBL:rnCharmeleon_KLS:rvrV1.10:cvnAcer:ct10:cvrV1.10:
  dmi.product.family: Aspire 7
  dmi.product.name: Aspire A715-71G
  dmi.product.version: V1.10
  dmi.sys.vendor: Acer
  version.compiz: compiz 1:0.9.13.1+18.04.20180302-0ubuntu1
  version.libdrm2: libdrm2 2.4.95-1~18.04.1
  version.libgl1-mesa-dri: libgl1-mesa-dri 18.2.2-0ubuntu1~18.04.2
  version.libgl1-mesa-glx: libgl1-mesa-glx 18.2.2-0ubuntu1~18.04.2
  version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4.2
  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
  xserver.bootTime: Wed Mar  6 20:16:01 2019
  xserver.configfile: default
  xserver.errors:
   open /dev/dri/card0: No such file or directory
   open /dev/dri/card0: No such file or directory
   Screen 0 deleted because of no matching config section.
   AIGLX: reverting to software rendering
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   
  xserver.version: 2:1.19.6-1ubuntu4.2
  --- 
  ProblemType: Bug
  .tmp.unity_support_test.1:
   
  ApportVersion: 2.20.9-0ubuntu7.5
  Architecture: amd64
  CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: None
  CurrentDesktop: ubuntu:GNOME
  DistUpgraded: Fresh install
  DistroCodename: bionic
  DistroRelease: Ubuntu 18.04
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Intel Corporation Device [8086:591b] (rev 04) (prog-if 00 [VGA controller])
     Subsystem: Acer Incorporated [ALI] Device [1025:119b]
   NVIDIA Corporation GP107M [GeForce GTX 1050 Mobile] [10de:1c8d] (rev a1) 
(prog-if 00 [VGA controller])
     Subsystem: Acer Incorporated [ALI] GP107M [GeForce GTX 1050 Mobile] 
[1025:1197]
  InstallationDate: Installed on 2018-11-26 (100 days ago)
  InstallationMedia: Ubuntu 16.04.5 LTS "Xenial Xerus" - Release amd64 
(20180731)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 1bcf:2ca0 Sunplus Innovation Technology Inc. 
   Bus 001 Device 002: ID 04ca:3016 Lite-On Technology Corp. 
   Bus 001 Device 004: ID 04f3:0c03 Elan Microelectronics Corp. 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Acer Aspire A715-71G
  Package: xorg 1:7.7+19ubuntu7.1
  PackageArchitecture: amd64
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-45-generic 
root=UUID=06e8310e-d1a9-42d8-a804-841358355e74 ro recovery nomodeset
  ProcVersionSignature: Ubuntu 4.15.0-45.48-generic 4.15.18
  Tags:  bionic ubuntu
  Uname: Linux 4.15.0-45-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev roccat sambashare sudo www-data
  _MarkForUpload: True
  dmi.bios.date: 08/22/2017
  dmi.bios.vendor: Insyde Corp.
  dmi.bios.version: V1.10
  dmi.board.asset.tag: Type2 - Board Serial Number
  dmi.board.name: Charmeleon_KLS
  dmi.board.vendor: KBL
  dmi.board.version: V1.10
  dmi.chassis.type: 10
  dmi.chassis.vendor: Acer
  dmi.chassis.version: V1.10
  dmi.modalias: 
dmi:bvnInsydeCorp.:bvrV1.10:bd08/22/2017:svnAcer:pnAspireA715-71G:pvrV1.10:rvnKBL:rnCharmeleon_KLS:rvrV1.10:cvnAcer:ct10:cvrV1.10:
  dmi.product.family: Aspire 7
  dmi.product.name: Aspire A715-71G
  dmi.product.version: V1.10
  dmi.sys.vendor: Acer
  version.compiz: compiz 1:0.9.13.1+18.04.20180302-0ubuntu1
  version.libdrm2: libdrm2 2.4.95-1~18.04.1
  version.libgl1-mesa-dri: libgl1-mesa-dri 18.2.2-0ubuntu1~18.04.2
  version.libgl1-mesa-glx: libgl1-mesa-glx 18.2.2-0ubuntu1~18.04.2
  version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4.2
  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
  xserver.bootTime: Wed Mar  6 20:16:01 2019
  xserver.configfile: default
  xserver.errors:
   open /dev/dri/card0: No such file or directory
   open /dev/dri/card0: No such file or directory
   Screen 0 deleted because of no matching config section.
   AIGLX: reverting to software rendering
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   
  xserver.version: 2:1.19.6-1ubuntu4.2

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