Public bug reported:

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

** Affects: xorg-server (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: dpms fault segfault segmentation xorg xorg.conf

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xorg-server in Ubuntu.
https://bugs.launchpad.net/bugs/1772498

Title:
  Command "X -configure" segmentation fault

Status in xorg-server package in Ubuntu:
  New

Bug description:
  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

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1772498/+subscriptions

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