I have a legacy BIOS Kubuntu 22.04 install on a hard drive from another old Laptop, while I have another hard drive other OSs are installed on it in UEFI. However, From my mainbaord's BIOS/UEFI I terminated the CSM comparability and then the Legacy BIOS hard drive does not appear in the UEFI boot menu. However, there is an entry called Fedora when I choose it, it boots my Kubuntu 22.04 and it booted successfully without any error messages and I can login as ordinary as booting in CSM, but there is a bunch of missing drivers, such as WiFi, Audio etc
screenfetch./+o+- said@Satellite-L850-A700yyyyy- -yyyyyy+ OS: Ubuntu 22.04 jammy://+//////-yyyyyyo Kernel: x86_64 Linux 5.11.12-300.fc34.x86_64.++ .:/++++++/-.+sss/` Uptime: 55m.:++o: /++++++++/:--:/- Packages: 4058o:+o+:++.`..```.-/oo+++++/ Shell: fish 3.3.1.:+o:+o/. `+sssoo+/ Resolution: 1440x900.++/+:+oo+o:` /sssooo. DE: KDE 5.92.0 / Plasma 5.24.7/+++//+:`oo+o /::--:. WM: KWin\+/+o+++`o++o ++////. GTK Theme: Aritim-Light-GTK [GTK2/3].++.o+++oo+:` /dddhhh. Icon Theme: Amy-Light-Icons.+.o+oo:. `oddhhhh+ Disk: 156G / 570G (29%)\+.++o+o``-````.:ohdhhhhh+ CPU: AMD Ryzen 5 PRO 4650G with Radeon Graphics @ 12x 3.7GHz`:o+++ `ohhhhhhhhyo++os: GPU: AMD Radeon Graphics (renoir, LLVM 17.0.4, DRM 3.40, 5.11.12-300.fc34.x86_64).o:`.syhhhhhhh/.oo++o` RAM: 2751MiB / 11899MiB/osyyyyyyo++ooo+++/````` +oo+++o\:`oo++.As seen from screenfetch output, my old laptop is shown, while my current PC is a desktop based on AMD Ryzen and AsROCK steel legend mainbaord. Also the Firmware version is very old.
I tried to run sudo apt update to get the new drivers, but it does not work.