opengl and drm on a pi 3b?

Gene Heskett gheskett at
Thu Mar 16 22:42:26 UTC 2017

On Thursday 16 March 2017 13:55:44 Eric Anholt wrote:

> Gene Heskett <gheskett at> writes:
> > Hello all, been a while since I rang your doorbell, greetings from
> > West Virginia;
> >
> > I am in the process of converting an old lathe to cnc, and using a
> > pi 3b as the driver.
> >
> > Doing some work on the configuration today, I got curious to see if
> > the features I was adding to the configuration were pushing the poor
> > pi to the point of exhaustion. Firing up htop, the various bits and
> > pieces that together make up linuxcnc, were a total of about 4 or 5%
> > of the cpu load.  Compton, the x compositor, was burning something
> > in the region of 165%, or a little over 1.5 of its 4 cores. It was
> > also a few megabytes into swap, so I rebooted it, after which
> > compton was only using perhaps 35% of one core.
> That sounds like you're running your compositor in software rendering.

According to the Xorg.0.log, yes. But I've no idea how to fix that.

Thanks Eric.

Cheers, Gene Heskett
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
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