Letters "invisible" in Redhat 6.6

[peter . lingsberg]

I'm using RHEL6.6 but emacs is behaving very strange. Letters disappear 
(doesn't show) while I write. I have to do Ctrl-L to refresh to see the 
characters. Extremely annoying and I can hardly use emacs anymore. Version on 
emacs is 1:23.1-25.el6. I downloaded a newer emacs and compiled it, but the 
problem persists. Could it have something to do with X or gdm?

I have been running RHEL6.4 for a couple of years and had no problem with emacs 
there.

Snapshot of how it looks when I write or just move around with the cursor. Note 
that all spaces actually have chars:
http://ladda-upp.se/files/2016/b178199.jpg

If I then reload page with Ctrl-L, the window looks like this:
http://ladda-upp.se/files/2016/b178200.jpg

The characters are suddenly visible. But as soon as I start write or move 
cursor, the characters will be invisible again.

emacs -q, emacs -Q or changing fonts won't help. What to do??? I love emacs but 
I can't use it when it behaves like this...

Not sure graphic card is relevant. I run RHEL6.6 out-of-the-box as a virtual 
machine in VMware, but it is exactly the same environment as I had in RHEL6.4 
and there were no problems with emacs there.