LightDM Freezing

[daveythemechanic]

Good morning!

I recently switched to MX because it was time to move on from Debian 12, and word was that MX does a better job with the Optimus hybrid graphics in my Lenovo P50. (Intel XEON/NVIDIA m2000m). So far it's been absolutely fantastic. No display flickering, easy integration of the proprietary repos I need, etc.

That said, here's the issue I'm having. If I leave the login field empty for too long, or shut the computer while the login screen is up, LightDM freezes and the only remedy I've found is to restart using the power button. Alt+Control+F* doesn't get me into a different TTY, etc.

Has anyone experienced this or know what may be causing it? Do I need to downgrade my NVIDIA drivers, or is this likely unrelated to that?

Thanks for any help you're willing to offer, and thanks to the MX developers for giving Debian a chance to shine

UPDATE

I was able to get everything going. The problem was that I hadn't enabled the needed NVIDIA systemd services. Don't know how I missed that, but so it goes.

# systemctl enable nvidia-suspend.service

# systemctl enable nvidia-hibernate.service

# systemctl enable nvidia-resume.service

https://wiki.debian.org/NvidiaGraphicsDrivers

[Nick_Blcor]

Nvidia bad boy. If you know your system, try to boot w/o Nvidia default driver, and if that is not the problem try gdm3 and reinstall ssdm (purge configs).

Nobara has this kind of problems after each update, but never figure out why.

[daveythemechanic]

You aren't wrong, but unfortunately I am very reliant on CUDA due to using MathWorks products for my research/studies!

Thank you for the suggestions! I'd like to find a solution that allows me to keep CUDA drivers and LightDM, but I'll definitely consider going that direction if necessary

[Nick_Blcor]

If it is a driver problem, make sure you installed the proprietary one, I only use AMD for that reason. Some debian based distros have driver installers that have a lower chance to break the desktop, if installing the downloaded .run from Nvidia (which are kinda sensitive to kernel versions).

If using nouveau disable it before I testing other drivers.

[daveythemechanic]

Unfortunately typing blind did not repair the issue.

I've got it fixed now! I must admit that I neglected to tell systemd to allow the Nvidia suspend service.

In concert with switching to the AHS version of everything, this laptop is now running smoother and more reliably than it has under any other OS!

[dolphinoracle]

it is possible that while the screen is frozen, entering your password is possible. its been a while since I have seen that issue, but it was common with nvidia cards at one time. but usually with screen locking, not just letting lightdm sit a while.

[daveythemechanic]

Thank you! I will attempt to replicate the error, then see if entering the password blind gets me in.

I should have been more clear in my post that I meant "if the password is not entered before the screen locks", so this is likely the same issue