Hello, I've installed Slack15 on my laptop in dual-boot with Win10, UEFI installation, without any particular problem, so decided to upgrade my PC as well.

My PC has a i5 10600 processor, 32 Gb RAM, a (listen listen) Nvidia GT 710 card and 2 hard disks, so I decided to perform a single boot Legacy (not UEFI) installation.
This PC has happily (excluding some GUI freezing) run Slack 14.2_current till now.

I had been waiting the 15 Stable version for a long time, eager to install it, attracted by its greater stability. Now that I could finally install it, unfortunately I've encountered some headaches:

1) Nouveau driver: it needs to reboot to complete the X configuration. After that it's unstable at first when switching between root and user, then seems to stabilize. However its quality shows poorer than the 14.2 one: the background is dotted and the fonts are a bit knurled.

2) Display configuration: available resolutions and refresh rates of the same monitor are different for root and simple user. It happens for my 3rd monitor (I've connected 3 monitors to my video card): 1024x768@70 vs 1280x1024@60. No way to align settings since the relevant entries are missing (!).

3) Time goes onward at every boot, I need to reset it again and again running hwclock. And this is a single-boot installation, not a dual-boot one.

4) Konsole: it doesn't remember the window size although selected in Settings.

5) Virtualbox: while the 6.1.32 works fine on my laptop, it shows the following error messages on my PC:
____________________________________________________________________________________________________ ________

(process:21819): GLib-GObject-WARNING **: 18:35:06.213: cannot register existing type 'NMAgentManagerError'

(process:21819): GLib-CRITICAL **: 18:35:06.213: g_once_init_leave: assertion 'result != 0' failed

(process:21819): GLib-GObject-WARNING **: 18:35:06.213: cannot retrieve class for invalid (unclassed) type '<invalid>'
Segmentation fault
____________________________________________________________________________________________________ ________

So I've installed the 6.1.33 and have found that it works fine if running as root, while shows the above error if running as user. Maybe it could be a matter of permissions, but on which file(s)?


Any suggestions would be very appreciated.

Which desktop? If its KDE, are you trying to run in wayland? Nvidia and wayland do not mix well. Running the xserver works well on my system.

How are you determing this? I have a Nvidia GT710 also, and I see the same results as a regular user and as root.

You can see I'm running Nvidis 470.94, and I don't see any of the issues you describe using Nouveau. I have alos used this driver; NVIDIA-Linux-x86_64-390.147.run from Nvidia with excellent results.

How have you set up time on your system? Is hwclock set to local time or GMT?

No ideas on the last 2 items. Hopefully someone else does.

- I've kept the default setting, no idea how to set wayland.
- FYI nouveau is the default driver that must be disabled if you mean to install nvidia drivers. The nvidia installer requires that. So, if you are running nvidia cannot run (and therefore see any interference with) nouveau.
- Just installed nvidia 470.103.1, the same problem persists. Are you using contemporarily 3 monitors with the same PC as I've written?
- Clock problem solved setting time to GMT and letting Windows to do the watchmaker.

You can select wayland form the sddm login screen. Depending on the background (KDE allows download different backgrounds) you are using, the option moves around, so have a close look before you log in. I see artifacts and other video issues if I use wayland on a system with an Nvidia card regardless what video driver I have loaded. Wayland works on my laptop without problems, its pure intel.

I don't use multiple monitors, just one. I have no way of testing multiple mointors. You have not said if you have more than one video card for the 3 monitors.

I login from the shell and then I run startx, so I don't use sddm.
I'm using only one video card for 3 monitors (0=LCD + 1=HDMI + 2=CRT), it has 3 slots.

This implies you are not running wayland.

Wish I could help more, at this point I have nothing more to add. Possibly someone else will chime in.

GT710 is Kepler card. If you want to use it with nouveau, you should mount the debugfs and bump the clock speeds up.Look at /sys/kernel/debug/dri/0/pstate
The 0 in that path may vary as your cpu has an additional gpu. Also both your intel & nvidia gpus could be active at same time. Run xrandr --listproviders in terminal app with X running. If there is more that one provider, you need to use xorg.conf and or environment variables to control which gpu does what for you. The two provider issue could exist for both proprietary & nouveau drivers.

Thank you, meanwhile I've installed the nvidia drivers and hope to be fine like that.

At the moment my bigger problem remains:

Why log in and run X as root, su or sudo are not an option for what you want to do?

That's not the point, I haven't written that.
Exactly, the Display Configuration *of the same monitor* shows different refresh rate entries for root and for simple user.
That's a malfunctioning and that's what I'd like to solve.