Thank you very much for your help.
I have tried by modifying my system config. But when I do "guix system reconfigure", I am getting the error "/etc/rg-secondary.scm:45:8: error: invalid field specifier".
I have attached my system config with this email.
RG.
Earlier, I wrote:
2) Input using stylus pen.
The touch screen is apparently a Wacom device. From GNOME, you might be
able to easily set it up from the "Wacom" section of GNOME settings. I
don't know about other desktop environments off-hand.
[...]
To set it up permanently, it *might* be sufficient to add something like
the following to your OS configuration, merging it with your existing
'services' field if needed:
(services (append (list ;; other services go here
(set-xorg-configuration
(xorg-configuration
(modules (cons xf86-input-wacom
%default-xorg-modules)))))
%desktop-services))
with at least the following imports near the top of the file:
(use-service-modules desktop xorg)
(use-package-modules xdisorg)
On second thought, it seems likely that the "permanent" approach
suggested above is the only way to make this work on Guix.
Mark