A few days ago my system (Ubuntu 22.04.3 LTS 64bit) was working completely. Out of seemingly nowhere (I don't remember doing anything different from usual) my laptop started not going to sleep when I close the lid. The screen goes black but is still lit, the fans keep going, and my mouse still glows which should not happen in sleep mode, so the computer is not actually suspended. The problem is I can't wake the PC up from this state, anything I do doesn't seem to affect it in any way, and I have to force a shut down by holding the power button. I tried making it sleep from the shutdown menu, and still I get the same result. Every time my PC goes to "sleep" (I don't think it's actually going to sleep since I can hear the fans and I see the mouse glowing) I have no way of waking it up except with a forced shutdown.
I tried shutting it down and rebooting it as well, and I get similar results: the shut down screen pops up, with my computer's logo and the loading wheel, but after the loading wheel goes away the logo just stays there and the computer doesn't actually shut down, so again I have to force it to by pressing the power button.
I tried googling for answers but couldn't find much, and I have really no idea of where to start to diagnose the problem. Anyone has any idea of what could be happening?
edit:
Running the journalctl --grep='sleep|suspend|resume' --no-pager --since='-1hour' command gave me this output:
ago 13 18:51:58 antonio-omen-ubuntu kernel: nvme 0000:3b:00.0: platform quirk: setting simple suspend
ago 13 18:53:55 antonio-omen-ubuntu systemd-logind[934]: Suspending...
ago 13 18:53:55 antonio-omen-ubuntu NetworkManager[861]: <info> [1691945635.2727] manager: sleep: sleep requested (sleeping: no enabled: yes)
ago 13 18:53:55 antonio-omen-ubuntu NetworkManager[861]: <info> [1691945635.2728] device (eno1): state change: unavailable -> unmanaged (reason 'sleeping', sys-iface-state: 'managed')
ago 13 18:53:55 antonio-omen-ubuntu ModemManager[1018]: <info> [sleep-monitor-systemd] system is about to suspend
ago 13 18:53:55 antonio-omen-ubuntu NetworkManager[861]: <info> [1691945635.2842] device (p2p-dev-wlo1): state change: disconnected -> unmanaged (reason 'sleeping', sys-iface-state: 'managed')
ago 13 18:53:55 antonio-omen-ubuntu NetworkManager[861]: <info> [1691945635.2843] manager: NetworkManager state is now ASLEEP
ago 13 18:53:55 antonio-omen-ubuntu NetworkManager[861]: <info> [1691945635.2845] device (wlo1): state change: activated -> deactivating (reason 'sleeping', sys-iface-state: 'managed')
ago 13 18:53:55 antonio-omen-ubuntu NetworkManager[861]: <info> [1691945635.4598] device (wlo1): state change: deactivating -> disconnected (reason 'sleeping', sys-iface-state: 'managed')
ago 13 18:53:55 antonio-omen-ubuntu NetworkManager[861]: <info> [1691945635.5232] device (wlo1): state change: disconnected -> unmanaged (reason 'sleeping', sys-iface-state: 'managed')
ago 13 18:53:56 antonio-omen-ubuntu systemd[1]: Reached target Sleep.
ago 13 18:53:56 antonio-omen-ubuntu systemd[1]: Starting System Suspend...
ago 13 18:53:56 antonio-omen-ubuntu systemd-sleep[5841]: Entering sleep state 'suspend'...
ago 13 18:53:56 antonio-omen-ubuntu kernel: PM: suspend entry (deep)
-- Boot f8879360ce544bcebc850319ae0a13ad --
ago 13 18:58:07 antonio-omen-ubuntu kernel: nvme 0000:3b:00.0: platform quirk: setting simple suspend
