[xmonad] urxvt slow rendering

[Anthony Brice]

I had a similar problem with urxvt while running xmonad where urxvt would
often not render the last line of output until the terminal received some
input.  It turned out I had compton configured incorrectly. I needed to add
the flag --xrender-sync. I don't know if that's your exact problem, but I
hope it helps.

On Tue, Mar 7, 2017 at 6:34 PM Brandon Allbery <allbery.b at gmail.com> wrote:

>
> 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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