Command "X -configure" segmentation fault

[Head Monkey]

Was searching for a method to disable DPMS via a custom /etc/X11/xorg.conf file and discovered this bug. Under a fresh Ubuntu 18.04 minimal desktop installation, after stopping gdm3 and executing "sudo X -configure" in /etc/X11 subdirectory to create an xorg.conf file, this happens:

X.Org X Server 1.19.6
Release Date: 2017-12-20
X Protocol Version 11, Revision 0
Build Operating System: Linux 4.4.0-119-generic x86_64 Ubuntu
Current Operating System: Linux {hostname} 4.15.0-20-generic #21-Ubuntu SMP Tue Apr 24 06:16:15 UTC 2018 x86_64
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.15.0-20-generic root=UUID=562f17d1-d033-4aa0-ba91-f8a04e7510a6 ro quiet splash vt.handoff=1
Build Date: 13 April 2018 08:07:36PM
xorg-server 2:1.19.6-1ubuntu4 (For technical support please see http://www.ubuntu.com/support)
Current version of pixman: 0.34.0
Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Mon May 21 11:26:02 2018
(EE)
(EE) Backtrace:
(EE) 0: /usr/lib/xorg/Xorg (xorg_backtrace+0x4d) [0x564f083b08ad]
(EE) 1: /usr/lib/xorg/Xorg (0x564f081f8000+0x1bc649) [0x564f083b4649]
(EE) 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7fb92b9ca000+0x12890) [0x7fb92b9dc890]
(EE) 3: /usr/lib/xorg/Xorg (0x564f081f8000+0xb2294) [0x564f082aa294]
(EE) 4: /usr/lib/xorg/Xorg (xf86BusProbe+0x9) [0x564f08282229]
(EE) 5: /usr/lib/xorg/Xorg (InitOutput+0x7f1) [0x564f08290e51]
(EE) 6: /usr/lib/xorg/Xorg (0x564f081f8000+0x56cd3) [0x564f0824ecd3]
(EE) 7: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xe7) [0x7fb92b5fab97]
(EE) 8: /usr/lib/xorg/Xorg (_start+0x2a) [0x564f08238b8a]
(EE)
(EE) Segmentation fault at address 0x50
(EE)
Fatal server error:
(EE) Caught signal 11 (Segmentation fault). Server aborting
(EE)
(EE)
Please consult the The X.Org Foundation support
at http://wiki.x.org
for help.
(EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
(EE)
(EE) Server terminated with error (1). Closing log file.

lsb_release -rd

Description: Ubuntu 18.04 LTS
Release : 18.04

apt-cache policy xorg

xorg:
  Installed: 1:7.7+19ubuntu7
  Candidate: 1:7.7+19ubuntu7
  Version table:
 *** 1:7.7+19ubuntu7 500
        500 http://us.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
        100 /var/lib/dpkg/status

What I expected:

  I expected "X -configure" to write a default xorg.conf file in /etc/X11

What happened instead:

  X binary crashed

Personal Note:

  Will create ugly hack to solve my problem while this bug gets fixed. Not holding my breathe, please add "you don't need an xorg.conf file" comments below. :D

[Daniel van Vugt (vanvugt)]

Thanks for the bug report.

This appears to be bug 1772550.

[Daniel van Vugt (vanvugt)]

Make that bug 1753012.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.