bug#16420: 24.3; Drawing an overlay causes 100% cpu utilization

[Dmitry Antipov]

On 01/13/2014 01:35 PM, Lars Andersen wrote:

> I am not familiar with X server configuration's but will try 0) if 1) and 2) 
> aren't enough.

Do you have some 3D effects (like h/w shading or transparency) enabled in 
window manager?
(I'm asking because xtruss reports a lot of UnknownExtensionRequest events). If 
this is so,
you can try to disable them somewhere in WM configuration file(s) without 
touching X at all.

Also try to run twm and Emacs as the only X client (just to cease to suspect 
WM).

Dmitry