Dave composed on 2017-08-03 10:23 (UTC-0400):

> Video now looks like 8 color mode....

> On 30th July, I did an update/upgrade on Ubuntu-16.04.  I should have 
> known better when it wanted to update X-server and Grub on the same 
> shot....Computer boots OK stops at TDM login screen..normal. but the 
> graphics in the background picture look awful.... 

Start by showing us Xorg.0.log from /var/log/ or ~/.local/share/xorg/. You can
use pastebinit from a vtty login if unable reach https://pastebin.ubuntu.com/ or
https://pastebin.com/ in a browser to upload it.

Other clues might be found with 'dmesg | grep fail'. If you see any that look
like could be related post them here if few, or pastebin if many.

Given it happens in XFCE too, a query among Ubuntu email or
https://askubuntu.com/ users might provide more expedient help.
-- 
"The wise are known for their understanding, and pleasant
words are persuasive." Proverbs 16:21 (New Living Translation)

 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/