Thank you for your reply, ljb643. My monitor is a CRT, thanks God.
I've just found Rev.3 of the same HOWTO you mentioned, which I had from a very old version of Slackware. The reason behind my post is the tiny fonts used nowadays in GUIs (and in the text console too as I could see when installing slack 14), which render them almost unintelligible for even people with normal vision.
Easy way to add custom screen resolution in linux and permanently store them (ubuntu 16.04 LTS)
So, my usual remedy has been to diminish the resolution and cope with a virtual screen.
By the way, is there a utility that queries the monitor and dumps its data, such as dot clock frequency, max horizontal scan frequency et cetera?
EDIT: thank you guys for your posts.
@dugan: xvidtune gets a 'Video modes are not settable on this chip' message.
My video adapter is a cheep one.
Last edited by stf92; 01-01-2013 at 03:12 PM.