Regarding the native resolution issue...
The following will tell you which resolution you're running X at:
Code:
xdpyinfo | grep dimensions
If you're using the binary NVidia drivers, you can also run
nvidia-settings to set your resolution.
And anyway... the updated slackware-lcdfilter SlackBuilds are up. You can download them from the usual place:
https://github.com/duganchen/slackware-lcdfilter
As always, the recommended installation method is to simply rebuild and install all 4 packages in order. Use upgradepkg --reinstall if you need to.
Note that they now include a utility called
ft-settings.sh. Have fun playing with it.