It's a desktop, so I'm always using an external monitor. There is no integrated graphics either; the motherboard has an HDMI port to support it with a processor that included them but I've got a Ryzen 3600 which does not include any so that port does nothing.
It's definitely something to do with NVIDIA's drivers being sticky-wicket on Linux; the Ubuntu recovery mode works because it's using the generic nouveau driver instead of NVIDIA's, but that means I get no sound-out through HDMI, no high resolution (it's a 43" 4k TV, but 1080p or below are all that's available) no actual hardware rendering, etc. I'm fairly sure it's also running the CPU and RAM clock speeds at the lowest settings, too, but the dock widget I'd usually use to track that is for the XFCE desktop environment and as I said I'm currently stuck in Cinnamon. Not that that can't be changed of course, but changing DE's is such a pain in the ass people usually just do a whole new install instead, and that' s effort I'd rather spend on fixing my original system. If I could figure out how to switch to nouveau from the command line I'd probably at least be able to get this level of semi-functionality back on that, but that is proving to be a very obscure ask.
I actually had the same problem with only the nouveau driver working when I first got the GeForce RTX3060 to replace my original Radeon RX580, but I can't remember what I did to sort it out then, only that it took days to find something that worked, and that I never actually figured out why it worked.
It's definitely something to do with NVIDIA's drivers being sticky-wicket on Linux; the Ubuntu recovery mode works because it's using the generic nouveau driver instead of NVIDIA's, but that means I get no sound-out through HDMI, no high resolution (it's a 43" 4k TV, but 1080p or below are all that's available) no actual hardware rendering, etc. I'm fairly sure it's also running the CPU and RAM clock speeds at the lowest settings, too, but the dock widget I'd usually use to track that is for the XFCE desktop environment and as I said I'm currently stuck in Cinnamon. Not that that can't be changed of course, but changing DE's is such a pain in the ass people usually just do a whole new install instead, and that' s effort I'd rather spend on fixing my original system. If I could figure out how to switch to nouveau from the command line I'd probably at least be able to get this level of semi-functionality back on that, but that is proving to be a very obscure ask.
I actually had the same problem with only the nouveau driver working when I first got the GeForce RTX3060 to replace my original Radeon RX580, but I can't remember what I did to sort it out then, only that it took days to find something that worked, and that I never actually figured out why it worked.
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‎noli esse culus
‎noli esse culus