[Bug 2056331] Re: [SRU] fix suspend/resume when there are no input devices

[Daniel van Vugt]

The fix is also missing from Noble so please start with Noble.

** Bug watch added: gitlab.freedesktop.org/xorg/xserver/-/issues #1387
   https://gitlab.freedesktop.org/xorg/xserver/-/issues/1387

** Also affects: xorg-server via
   https://gitlab.freedesktop.org/xorg/xserver/-/issues/1387
   Importance: Unknown
       Status: Unknown

** Changed in: xorg-server (Ubuntu)
   Importance: Undecided => Medium

** Changed in: xorg-server (Ubuntu)
       Status: New => Triaged

** Tags added: jammy noble

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https://bugs.launchpad.net/bugs/2056331

Title:
  [SRU] fix suspend/resume when there are no input devices

Status in X.Org X server:
  Unknown
Status in xorg-server package in Ubuntu:
  Triaged

Bug description:
  [Impact]

  Bug is impacting the suspend/resume flow when there is no input device
  connected to machine. xorg hangs in this case.

  [Where problems could occur]

  The problem could occur in places where there is no input device
  connected to the system but a suspend/resume is triggered.

  [Test Case]

  * Enable proposed updates (https://wiki.ubuntu.com/Testing/EnableProposed)
  * Update xorg-server to the version in -proposed: sudo apt install -t jammy-proposed xorg-server
  * Unplug all USB devices such as USB drive, keyboard, mouse, etc.
  * Set RTC timer and suspend the system via UART console
      $ echo 8 > /proc/sys/kernel/printk
      $ sudo rtcwake -v -m no -s 240
      $ sudo systemctl suspend

  [Regression Potential]

  The patch defines a default behavior in systemd_logind_drop_master
  function so there is a possibility that there might be a regression
  that may affect all the systems that utilizes
  systemd_logind_drop_master

  ------------------------
  Upstream Bug: https://gitlab.freedesktop.org/xorg/xserver/-/issues/1387

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