Can you please give me a command to check it out?
We can write this info to a file at the same time you're looking at it. Open a terminal, use the following commands.
bash | tee ~/compinfo
pgrep -l .*wm.*
cat /var/log/Xorg.0.log | grep "modules/drivers"
Ok, you've seen the info. Now you can share it.
You probably know this already, but if you don't: from terminal, left-click and drag to highlight, right-click to copy, and (here's the important part) click left and right at the same time to paste. (If you have a three-button touchpad, use the middle button to paste).
From what you've said, I think you're probably right about it being Light 6. If it is, upgrading to Light 7.0 will probably solve at least some of this problem. "cat /etc/vector-version" tells your version for sure. The Headacher had given you that command, and nightflier hinted at it again. Not a reprimand, just advice. Getting to know a linux is fun for you, or you wouldn't still be doing it.
Take a breath, smile, let it out. Slow down and relax. Take time to enjoy getting to know VL. Good to see you.