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Installing the nvidia-driver-390 package and disabling (or not) the
nouveau drivers results in a system that superficially appears to busy
hang before reaching the login screen, leaving only the fsck
"/dev/sda1: clean,..." message on the screen.

The machine is alive, and logging in remotely gives a hint at what is
happening. The output of top shows that init and systemd are struggling
with something:

```
top - 17:24:00 up 1 min,  1 user,  load average: 2.76, 1.00, 0.36
Tasks: 188 total,   2 running, 106 sleeping,   0 stopped,   0 zombie
%Cpu(s): 17.0 us, 15.2 sy,  0.0 ni, 67.6 id,  0.0 wa,  0.0 hi,  0.1 si,  0.0 st
KiB Mem : 16238012 total, 15513832 free,   242248 used,   481932 buff/cache
KiB Swap: 16001020 total, 16001020 free,        0 used. 15716900 avail Mem 

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND     
                                                               
    1 root      20   0  225600   9312   6672 S  60.4  0.1   0:51.63 /sbin/init 
nosplash                                                        
  797 root      20   0   71656   7180   5296 S  26.8  0.0   0:14.92 
/lib/systemd/systemd-logind                                                
 1133 root      20   0   46368   3584   1976 R  13.9  0.0   0:12.01 
/lib/systemd/systemd-udevd                                                 
  795 root      20   0 1773200  30772  12548 S  13.2  0.2   0:11.71 
/usr/lib/snapd/snapd                                                       
  784 message+  20   0   51464   6036   3988 S  12.9  0.0   0:11.15 
/usr/bin/dbus-daemon --system --address=systemd: --nofork --nopidfile --s+ 
  308 root      19  -1  249904 120460 114260 S  10.7  0.7   0:10.60 
/lib/systemd/systemd-journald                                              
 1132 root      20   0   46368   3584   1976 S  10.0  0.0   0:08.71 
/lib/systemd/systemd-udevd                                                 
 1134 root      20   0   46368   3260   1656 S  10.0  0.0   0:08.61 
/lib/systemd/systemd-udevd                                                 
  333 root      20   0   46368   4684   3084 S   5.0  0.0   0:04.25 
/lib/systemd/systemd-udevd       
```

Eventually, Xorg does manage to get a word in, but falls over, to try
again repeatedly.

```
top - 16:52:36 up 2 min,  1 user,  load average: 1.69, 1.04, 0.43
Tasks: 187 total,   2 running, 106 sleeping,   0 stopped,   0 zombie
%Cpu(s):  9.5 us,  3.7 sy,  0.0 ni, 85.6 id,  0.0 wa,  0.0 hi,  1.2 si,  0.0 st
KiB Mem : 16238012 total, 15457080 free,   278152 used,   502780 buff/cache
KiB Swap: 16001020 total, 16001020 free,        0 used. 15680684 avail Mem 

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND     
                                                               
 1821 root      20   0  312908  61228  20584 R  65.2  0.4   0:01.97 
/usr/lib/xorg/Xorg vt1 -displayfd 3 -auth /run/user/121/gdm/Xauthority -b+ 
  806 root      20   0   71656   7200   5320 S  18.5  0.0   0:24.83 
/lib/systemd/systemd-logind                                                
```

A further hint comes from syslog which is spammed with systemd trying to
start nvidia-persistenced, which is then killed. This happens hundreds
of times while the machine is up. This except shows one instance.

```
May 22 16:34:52 cube systemd[1]: Starting NVIDIA Persistence Daemon...
May 22 16:34:52 cube nvidia-persistenced: Verbose syslog connection opened
May 22 16:34:52 cube nvidia-persistenced: Now running with user ID 123 and 
group ID 127
May 22 16:34:52 cube systemd[1]: Started NVIDIA Persistence Daemon.
May 22 16:34:52 cube nvidia-persistenced: Started (31927)
May 22 16:34:52 cube nvidia-persistenced: device 0000:01:00.0 - registered
May 22 16:34:52 cube nvidia-persistenced: Local RPC service initialized
May 22 16:34:52 cube nvidia-persistenced: Received signal 15
May 22 16:34:52 cube systemd[1]: Stopping NVIDIA Persistence Daemon...
May 22 16:34:52 cube nvidia-persistenced: Socket closed.
May 22 16:34:52 cube nvidia-persistenced: PID file unlocked.
May 22 16:34:52 cube nvidia-persistenced: PID file closed.
May 22 16:34:52 cube nvidia-persistenced: The daemon no longer has permission 
to remove its runtime data directory /var/run/nvidia-persistenced
May 22 16:34:52 cube nvidia-persistenced: Shutdown (31927)
May 22 16:34:52 cube systemd[1]: Stopped NVIDIA Persistence Daemon.
```

This is a fresh install of 18.04.2 (less than an hour old). If apport
has not collected all the necessary details I'll post them after this.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: xorg 1:7.7+19ubuntu7.1
ProcVersionSignature: Ubuntu 4.18.0-20.21~18.04.1-generic 4.18.20
Uname: Linux 4.18.0-20-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
.proc.driver.nvidia.gpus.0000.01.00.0: Error: [Errno 21] Is a directory: 
'/proc/driver/nvidia/gpus/0000:01:00.0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module  390.116  Sun Jan 27 07:21:36 
PST 2019
 GCC version:  gcc version 7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04)
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: amd64
BootLog:
 
Date: Wed May 22 17:24:31 2019
DistUpgraded: Fresh install
DistroCodename: bionic
DistroVariant: ubuntu
DkmsStatus: nvidia, 390.116, 4.18.0-20-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation HD Graphics 530 [8086:191b] (rev 06) (prog-if 00 [VGA 
controller])
   Subsystem: CLEVO/KAPOK Computer HD Graphics 530 [1558:6540]
 NVIDIA Corporation GM204M [GeForce GTX 970M] [10de:13d8] (rev a1) (prog-if 00 
[VGA controller])
   Subsystem: CLEVO/KAPOK Computer GM204M [GeForce GTX 970M] [1558:6540]
InstallationDate: Installed on 2019-05-22 (0 days ago)
InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 004: ID 5986:066d Acer, Inc 
 Bus 001 Device 003: ID 0cf3:e300 Atheros Communications, Inc. 
 Bus 001 Device 002: ID 1c7a:0603 LighTuning Technology Inc. 
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Notebook P65_P67RGRERA
ProcEnviron:
 LANGUAGE=en_AU:en
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-20-generic 
root=UUID=d6da27fa-5d91-4240-b3c9-c7de06124a36 ro nomodeset quiet nosplash
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/27/2016
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1.05.13
dmi.board.asset.tag: Tag 12345
dmi.board.name: P65_P67RGRERA
dmi.board.vendor: Notebook
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Notebook
dmi.chassis.version: N/A
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr1.05.13:bd01/27/2016:svnNotebook:pnP65_P67RGRERA:pvrNotApplicable:rvnNotebook:rnP65_P67RGRERA:rvrNotApplicable:cvnNotebook:ct10:cvrN/A:
dmi.product.family: Not Applicable
dmi.product.name: P65_P67RGRERA
dmi.product.sku: Not Applicable
dmi.product.version: Not Applicable
dmi.sys.vendor: Notebook
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.95-1~18.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 18.2.8-0ubuntu0~18.04.2
version.libgl1-mesa-glx: libgl1-mesa-glx 18.2.8-0ubuntu0~18.04.2
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core N/A
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A

** Affects: gdm3 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic ubuntu
-- 
NVIDIA driver (390) does not allow progress to login screen
https://bugs.launchpad.net/bugs/1830000
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