Comment 5 for bug 320700

Hi,
I too have the same problem.
When viewing a syntax highlighted file, page-up/down is slow. we could see re-rendering with eye. (I mean it is slow )
I noticed this issue after update from 12.04 -> 14.04.
I tried changing graphics drivers in xorg.conf
When I used 'fbdev' as driver, The problem doesn't exists but other graphics performance (such as compiz's work space switching) became slow. Also 'glxheads' didn't reported a correct 'GL_RENDERER' when I used fbdev.

using fglrx driver also fixed the same problem ( gvim's ). But I don't use fglrx because LCD backlight will not function with fglrx