I have a Brother printer + scanner too (MFC-L2750DW). Many Brother printers (and a lot of non-Brother printers too) are supported by default in Fedora using a “driverless” method. It’s part of “IPP Everywhere” (www.pwg.org/ipp/everywhere.html), AirPrint (Apple), and Direct Print (Microsoft), and most printers support it these days, and Fedora supports all of these. (Other distros likely do too.)
At least in GNOME (on Silverblue here), if it doesn’t already show up and work, you can click on “Add Printer…” and it should find and add it. KDE and other desktops will likely be different — although hopefully not much different.
Scanning with “Document Scanner”, aka: “Simple-Scan”, detects my networked Brother printer for scanning without having to do anything too. flathub.org/apps/org.gnome.SimpleScan
I hope this helps!
undervolting requires turning off secureboot or a patch
I haven’t looked into undervolting much. I know some people have mentioned CoreCtrl; I haven’t managed to figure it out yet.
If it requires turning off secureboot or a patch, that’s a bummer and might be why I couldn’t find the settings in CoreCtrl. I haven’t seen this when looking it up a while back, however (but the Internet is big). CoreCtrl setup docs @ gitlab.com/corectrl/corectrl/-/wikis/Setup don’t mention either.
I do see that it requires setting a kernel flag, which on ostree-based distributions is: