Comment 6 for bug 1775392

I'm also running into this bug (or at least something that looks like it). Typically what happens for me is that I resume from suspend, get an unlock prompt (the system is locked on suspend) and when I log in, the unlock prompt stays visible (the password dots disappear, but I cannot type anything or click any buttons). When I then kill X to recover (ctrl-alt-backspace), I get a new login prompt. Sometimes, logging in again no longer works then, seeing such messages in the console:

jun 21 17:01:50 grubby at-spi-bus-launcher[30649]: XIO: fatal IO error 11 (Resource temporarily unavailable) on X server ":1024"
jun 21 17:01:50 grubby at-spi-bus-launcher[30649]: after 21 requests (21 known processed) with 0 events remaining.
jun 21 17:01:50 grubby gsd-power[30703]: gsd-power: Fatal IO error 11 (Resource temporarily unavailable) on X server :1024.
jun 21 17:01:50 grubby gsd-keyboard[30715]: gsd-keyboard: Fatal IO error 11 (Resource temporarily unavailable) on X server :1024.
jun 21 17:01:50 grubby gsd-xsettings[30696]: gsd-xsettings: Fatal IO error 11 (Resource temporarily unavailable) on X server :1024.
jun 21 17:01:50 grubby gsd-media-keys[30731]: gsd-media-keys: Fatal IO error 11 (Resource temporarily unavailable) on X server :1024.
jun 21 17:01:50 grubby systemd-logind[1100]: Session c9 logged out. Waiting for processes to exit.
jun 21 17:01:50 grubby gsd-clipboard[30695]: gsd-clipboard: Fatal IO error 11 (Resource temporarily unavailable) on X server :1024.
jun 21 17:01:50 grubby gsd-color[30713]: gsd-color: Fatal IO error 11 (Resource temporarily unavailable) on X server :1024.
jun 21 17:01:50 grubby gnome-shell[30633]: Connection to xwayland lost

From the messages, I suspect this might be the same problem as the original poster.

However, I'm not entirely sure if at-spi-bus-launcher is actually the culprit here. Could it be that that the xserver or xwayland (I'm not sure which - I'm using the GNOME xorg session since the wayland session doesn't work for me, but the log does talk about xwayland) crashes and that at-spi-bus-launcher is just the first process to find out (because it does so many requests maybe?). I've also seen some instances where at-spi-bus-launcher is not the first one in the log, and I've tried disabling at-spi-bus-launcher by masking it in systemd (not entirely sure if that really worked), but then I also think I saw a crash where at-spi-bus-launcher would not show up in the log at all.

One additional observation: At some point during testing, while login would not work, I found a logged in session in some virtual terminal. After logging out that session, logins would work again as normal. I'm not entirely sure if there's a causal relationship there, nor where that logged in session came from (but I was testing with two different users to see if there was something in my homedir that triggered it, so perhaps it came from one of those tests...). Vague, but I wanted to mention this just in case it triggers an idea somewhere :-)

As for reporting an upstream issue, that is probably a good idea, though I'm not entirely sure where the cause is. It's probably safe to say it is something in gnome, though.