Arch Linux

What configuration would you put there?

The only reason it exists for is to add the "missing" builtin section in the X server to allow autodetection (which you can't edit either).

I would like to add
Option "NoLogo" "True"
in the Device section which is provided by that file to stop the nvidia logo on boot. As far as I know, I can not add extra fields to that section in another file.

We could add this b default...though I don't see the logo without this option either.

Hm, there's always the possibility to configure a new device section that is read before this one (with a lexicographically smaller filename), it will be used first. I don't have any strong opinions on this one though.

I see the logo without
Option "NoLogo" "True" # a sensible default for 20-nvidia.conf

Since the nvidia driver can be heavily tweaked, it would make sense to backup 20-nvidia.conf

In any case many of the options can be specified either in a "Screen" or "Device" section

http://ftp.iinet.net.au/pub/nvidia/solaris/1.0-9629/README/appendix-d.html

this is about the backup array

it should be added!

I agree, I've had my configs overwritten several times now since I keep forgetting to back it up.
Or should - for example dual monitor configurations - be placed in another file?

The file is for the nvidia DEFAULT configuration, as the contents says. If you want your own configuration, just create 19-nvidia.conf (19 < 20, so it will be considered first).

Also, I thought Pierre added the backup= to the new nvidia in testing.

Got it, makes sense. User config -> separate file.

If you're willing to move all your Device configuration Options to the screen Section, you can accomplish all modifications directly from xorg.conf without touching xorg.conf.d/*