Sway: Unlocking physlock after lid is closed (suspend/sleep) causes blank screen

[nyancow]

#96 is similar to my issue, but in my case I am using Sway, not LightDM.
swayidle is used to trigger the lock before suspend like so:

swayidle -w \
          timeout 60 'physlock -dsm -p "1"' \
          timeout 300 'swaymsg "output * dpms off"' resume 'swaymsg "output * dpms on"' \
          before-sleep 'physlock -dsm -p "2"'

When the lid is closed, suspend is triggered according to /etc/systemd/logind.conf which defines:

[Login]
...
HandleLidSwitch=suspend
...

When closing the lid, suspend is indeed triggered, and when waking form suspend, physlock shows a password prompt. But when the correct password is entered, the screen switches to a blank black screen. The only way to fix this is to switch to a different TTY, login, and kill Sway.

Just to clarify, the blank screen does not occur when using physlock during "regular" usage, i.e. without sleep/suspend triggers.
If I manually lock, then close the lid and suspend, the blank screen doesn't happen. But in that case, when I wake from suspend, then unlock, then proceed to lock again, this is the output:

physlock -d -s -m
physlock: /dev/tty-1: No such file or directory

And ps aux | grep physlock returns a list of ~60 physlock processes for the root user.

[savchenko]

swaylock appears to be broken and now this... What session lockers are still viable under Wayland?

[nyancow]

Honestly, it's beginning to look like the answer is none. The current state of session lockers is embarrassing.
I've tried swaylock, waylock and now physlock, and none of them supply basic out-of-the-box functionality I would expect from a locker (and that's before going into anything regarding design/aesthetics or more advanced capabilities like fingerprint unlocking).
I really appreciate the effort that developers are putting into this, but the fact is none of them provide the basic functionality needed:

• Session lock: no sudden flashes of the unlocked session, no crashes that leave an unlocked session
• Session unlock: no remaining locked when it's been unlocked, no freezes on wake from sleep, no double locking

You can follow the discussion here, but it doesn't look to be moving forward: swaywm/wlroots#2706

[savchenko]

Reading the relevant topic at Freedesktop/Wayland and swaywm/wlroots#2706 makes me think that exiting to TTY suddenly does not look as bad.

[travankor]

Try hikari's screen locker.

[nyancow]

Try hikari's screen locker.

Is it provided in a separate package? If so, I can't seem to find it.

[travankor]

No, it's part of the compositor. Logo+Shift+Backspace is the keybinding in the default configuration.

[savchenko]

No, it's part of the compositor.

Well, then it's more of a "switch to another WM".

[travankor]

Ok, well that was just a suggestion. I'm happy if you fix sway with physlock or update swaylock to use the lockscreen protocol.

Session lock: no sudden flashes of the unlocked session
Session unlock: no remaining locked when it's been unlocked, no freezes on wake from sleep, no double locking

BTW, these are either bugs in the compositor or layer shell protocol, not the screen locker.

[savchenko]

BTW, these are either bugs in the compositor or layer shell protocol, not the screen locker.

This is being discussed here: https://gitlab.freedesktop.org/wayland/wayland-protocols/-/merge_requests/100