Hello! I'm pretty new to Linux and Linux Mint and I have ran into this weird issue.
I've installed Mint on a Lenovo Thinkpad P17 Gen 1 with an Intel Xeon W-10855m CPU and Nvidia Quadro RTX 5000 GPU. It has a 17.3 inch 16:9 4K screen which can natively support resolutions up to 4K. It has the option in BIOS to switch between discrete and hybrid graphics. The performance in the discrete graphics mode is way better compared to the hybrid graphics in both Windows 11 and Linux Mint even when using the Nvidia Prime performance profile in Mint so discrete mode is a must.
So when I'm in discrete graphics mode on Windows 11 I can see all the available resolutions for my screen and change from 800x600 all the way up to 3840x2160 with no issue. In games I also have all the resolutions available as expected.
In discrete graphics mode when I boot into the Linux Mint live USB I can see all the available resolutions and change them fine. After I do a fresh install of Linux Mint while still in discrete graphics mode I can see and change all of the resolutions with no issue. Up to this point I think Linux Mint has been using the Nouveau driver.
As soon as I install the Nvidia drivers via driver manager and reboot the laptop my resolution is locked to 3840x2160 and its the same in games. This is an issue as I don't want to be in 3840x2160 all the time especially in demanding games where lowering the resolution can significantly improve performance. The weird thing is when I go into the BIOS and switch to hybrid graphics mode which enables the Intel CPU graphics as well then reboot I can change the native resolutions as expected but as mentioned before the performance is worse. So I go into the BIOS and switch back to discrete graphics mode and reboot only for the resolution to be locked to 3840x2160 again.
Any help or fix for this so I can see and change between all the native resolutions would be greatly appreciated. Thank you!