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> I'm not sure why GNOME screensaver cannot do something like this. Lock screen crashing seems like something inevitable (especially considering buggy graphic card drivers and so on), and it makes sense to prepare for it so that crashes won't bypass the screen locker.
That is an option Linux Mint is considering[0] among other options.
[0]: https://github.com/linuxmint/cinnamon-screensaver/issues/354...
I'm surprised he doesn't mention XSecureLock. Its entire focus is on preventing issues like this with modularity and redundancy.
https://github.com/google/xsecurelock
Anecdotally, I use xidle[0] and xlock[1], and have found both to be very reliable. xidle supports locking the screen by sending it SIGUSR1, which is really useful since you can trigger it from a process that doesn't have DISPLAY set.
The trick on laptops is to block on sending the signal in the script you use to suspend, so that when the laptop resumes the display is already locked.
0 - https://github.com/steinex/xidle-linux
1 - http://sillycycle.com/xlockmore.html
I use physlock[0] which locks all of the ttys. I've had no issues.
[1] https://github.com/muennich/physlock
The screensharing can be worked around by building a somewhat hacky solution by recording the desktop to an XWayland window and sharing that, for example by using https://gitlab.com/lelgenio/dotfiles/-/blob/master/dotfiles/...