[xmonad] urxvt slow rendering

[Brandon Allbery]

On Tue, Mar 7, 2017 at 9:17 PM, Richard Watson <rwatson at imap.cc> wrote:

> I notice that when certain GUI application are running (e.g. Chrome,
> vmplayer, but not firefox & thunderbird) my urxvt terminal renders *really*
> slowly, redrawing the window line at a time! I also notice a huge X server
> CPU load (25-50%, as shown by top).
>
> I've looked at X server logs and config and cannot see anything that is
> unusual.
>
> Could there be an xmonad issue here? Has anyone else experienced something
> similar?  Any hints as to how to debug this?
>

xmonad has nothing to do with what happens *inside* windows. My gut feeling
would be either xorg video driver regression or (possibly but not likely,
especially since you'd have to have configured one manually) an
underpowered compositor (or one which, again, is interacting poorly with
the xorg video driver).

One thing you might check is if Chrome is using hardware acceleration
(direct GPU access); I've found that both slow and memory-gobbling, at
least with Intel Iris Pro video, and I could see it causing bad
interactions.

-- 
brandon s allbery kf8nh                               sine nomine associates
allbery.b at gmail.com                                  ballbery at sinenomine.net
unix, openafs, kerberos, infrastructure, xmonad        http://sinenomine.net
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