Activating two-finger scroll does not seem to work.
To enable screen brightness, you need to install and activate the kernel module
/etc/modprobe.d/modprobe.conf to contain:
options nvidia-bl max_level=131071 shift=9
In different models or with different video cards this might not work
max_level is a number one less than a power of 2. to find the ideal one for your laptop just load it with a value (the default is 2047), like
# modprobe nvidia-bl max_level=level
and, if it is not bright enough, try with the next number, not without unloading the module first:
# rmmod nvidia-bl
The shift parameter bit-shifts the brightness values, as to make it a sane number. The recommended is to make it so max_level is 256, so it can be calculated by adding one to the max_value (getting a power of two), then calculating the base 2 logarithm of that, and subtracting 8 from the result.
finally, you have to load the module, to do this, just issue
# modprobe nvidia-bl
To load it automatically at boot, add a
nvidia-bl.conf file as described in Kernel modules#Automatic module loading with systemd.
The brightness level can then be set by writing the desired value to
Enable and disable features
To make managing the features of the notebook easier, you can installAUR. Just install it and follow the instructions given by the install script.