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

[Launchpad Bug Tracker]

You have been subscribed to a public bug by Talha Can Havadar (tchavadar):

[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

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


** Tags: patch
-- 
[SRU] fix suspend/resume when there are no input devices
https://bugs.launchpad.net/bugs/2056331
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