Switch User feature on KDE login/unlock screen is broken

[Mister Pi]

I have an HP Envy laptop with an NVIDIA GeForce MX150 graphics card. I installed Bionic, and set up accounts for several people. The laptop is configured to suspend on close. On opening, it would show a KDE screen to unlock, or "Switch User." Switch User worked seamlessly. At one time I had 4 users simultaneously logged in (though only one would be active at a time, obviously).

Now it is broken. If I log in from a fresh boot, it is fine. If I close (or KDE->Leave->suspend) and then resume, if I hit Switch User I get the big + icon (New Session) and can log in to a different account. So far, so good. But it seems to have (mostly) killed my original session. There are only 10 processes under the original username (all suspended, naturally). Furthermore, wireless no longer works. If I suspend again, I can't switch back to my original login; I have to hit New Session and log in again. And wireless is still non-functional. (Sometimes no networks appear at all, while other times it asks for authentication.) The only way to get wireless back is to reboot.

I installed the NVIDIA proprietary driver recently. Could it have something to do with this, or UEFI? When I installed the driver, a screen that looked like a BIOS or old-style VGA screen came onto my terminal and made me set up a password for UEFI.

[Mister Pi]

I installed the NVIDIA proprietary driver recently. Could it have something to do with this, or UEFI? When I installed the driver, a screen that looked like a BIOS or old-style VGA screen came onto my terminal and made me set up a password for UEFI.

It seems to be the driver. I disabled the Nvidia driver, as described in https://www.kubuntuforums.net/showth...t-deinstalling, and the problem went away (i.e., I could switch to other users without losing my login, and everyone had wireless access).

Does anyone have any ideas about this? I suspect the driver is causing some instability with the switch user feature in KDE, which in turn is messing up the wireless. For instance, switch user somehow partially kills the other login, but it thinks the wireless is still "owned" by the other login?

[claydoh]

In the settings for your specific connection, there will be an option to have it available to all users, which may help with that part of the problem. I believe this will keeps the wifi up when switching users, as well as connecting earlier in the boot process (before user login).

[Mister Pi]

In the settings for your specific connection, there will be an option to have it available to all users, which may help with that part of the problem. I believe this will keeps the wifi up when switching users, as well as connecting earlier in the boot process (before user login).

OK, I clicked on the networks icon in the toolbar, then clicked on the configure icon, then under the General configuration tab, there is a check box "All users may connect to this network." Is this what you're talking about?

So it's not checked, and I never checked it before, so why am I able to do Switch User and the other user is able to use the wireless (EXCEPT when the Nvidia driver is active)?

But it's something I can try next time I try the Nvidia driver.