mark neidorff composed on 2022-02-17 17:41 (UTC-0500):
If the problem is not nouveau, what should I run to get more diagnostic information? Needless to say, my goal is a stable, graphical KDE environment.
It used to be with a Dell desktop that if a discrete graphics card was installed on a model that includes motherboard IGP or CPU IGP, that connecting a display to the IGP output would result in a BIOS message reporting that you are not allowed to do that, and must connect your display(s) to the discrete card's output(s) instead. I've not seen a Dell BIOS anywhere near as new as yours so as to know what to suggest you might need or want to do there. Motherboards for self-built PC's provide a lot more options re graphics setup. You might want to poke in yours for a suitable change to make. Ideally you have two ways to go: 1-Remove the discrete card 2-configure use of the discrete card to the exclusion of the IGP Another option would be to utilize the concept of "offloading", where the IGP and GPU share the job. That's more complicated and something I've never done. Whether anyone with such experience reads this list I have no idea, but I know there is at least one person routinely on the openSUSE forums who does, so you might want to do a search or inquire there. https://forums.opensuse.org/forumdisplay.php/668-Install-Boot-Login For option 1, it should be simple. Remove the discrete card, and let automagic do its thing without interference. NAICT, you have a 400 series Intel chipset PC, which supports Comet Lake (10th gen) and Rocket Lake (11th gen) Intel processors. At some point we may need to know the specific CPU model you have installed to be sure of how to proceed, as with Rocket Lake there could be an added problem if you ever connect more than one display at a time. All the bugs aren't out of Rocket Lake support yet. For option 2, you may need to blacklist i915 and/or i965, and/or change a BIOS option, to prevent interference from the IGP in using either of the two ostensibly competent FOSS display drivers for GeForce. If the GeForce cannot be made to work properly with the FOSS drivers, a bug report would be in order, as it should just work automagically. Installing *nouveau* may be necessary to enable that, as well as purging any residue from any prior attempt to install proprietary NVidia drivers that you might have made. To be complete, there's also the proprietary NVidia driver option, which I never use, so won't comment further about. -- Evolution as taught in public schools is, like religion, based on faith, not based on science. Team OS/2 ** Reg. Linux User #211409 ** a11y rocks! Felix Miata