Re: C-k messes up display -- have to redraw-display

[Eli Zaretskii <eliz@gnu.org>]

> Date: Wed, 3 Aug 2016 16:22:58 -0700 (PDT)
> From: rob.dunne@gmail.com
> Injection-Date: Wed, 03 Aug 2016 23:22:58 +0000
> 
> /tmp/emacs-25.1
> > emacs -Q  t.tex  #file with 1 letter per line -- a to h
> a
> b
> c
> d
> e
> f
> g
> h
> #I put the cursor at a and press C-k -- it clears to the end of line
> #I press C-k again to get rid of the blank line and the display then looks like
> b
> h
> h
> h
> h
> h
> h
> 
> M-x redraw display fixes it
> b
> c
> d
> e
> f
> g
> h

What you describe means that the software that actually draws to the
glass doesn't do what Emacs tells it to do.

Check the settings of your video hardware -- if there are some
"optimization" features there, turn them off, reboot, and try again.

If that doesn't help, check your versions and configuration of the X
related stuff (Xlib etc.) -- maybe you have some broken version.