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From: Eric Wetzel <thewetzel AT gmail DOT com>
Date: Fri, 23 Sep 2011 07:52:46 -0400
Message-ID: <CAMPiNCJz0ZvR1tUcmJ=6n4BszSoo+y4cMaov+RpCJpCZ_0w1Rw@mail.gmail.com>
Subject: Re: [geda-help] PCB Plane and Solder Mask Clearance Problem
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On Fri, Sep 23, 2011 at 5:04 AM, Peter Clifton <pcjc2 AT cam DOT ac DOT uk> wrote:
> On Thu, 2011-09-22 at 22:45 -0400, Eric Wetzel wrote:
>> >> If its still not working for you with GL enabled - could you post the
>> >> output of "glxinfo" for me to take a look at please?
>
> Your glxinfo shows you are using the Nouveau driver. It might be worth
> giving it a try with the proprietary driver at some point.

I looked in System -> Administration -> Additional Drivers, and the
only unactivated option was "Experimental 3D support for Nvidia cards"
(or some such). There was no option for proprietary Nvidia drivers, so
I'll have to figure out how to get them installed at the end of the
day.

> Before you try that, try starting PCB with the current mesa based
> driver, with:
>
> LIBGL_ALWAYS_SOFTWARE=1 pcb ...
>
> If things then work as expected - we can confirm it is a bug in your GL
> driver (or my code failing to test some capability in your GL driver).

I have tried this, and it works. Holes and clearances work properly,
but it has the same slow choppy feel as --disable-gl.

>> > I'm cloning the pcb+gl repository right now; I'll give that a shot.
>>
>> On the pcb+gl head, I configured with only the prefix option. I'm not
>> sure if I had to explicitly enable GL or if I should be using the
>> lesstif front-end, but I just let configure do its thing. Opening my
>> file in this version of pcb not only has the same lack-of-clearance
>> problems around vias, pins, and pads, but now the drill holes don't
>> appear either. Vias and pins just gray circles.
>
> How odd. Both symptoms suggest to me that the GL driver's "stencil"
> feature may not be working properly.
>
> The Lesstif GUI currently doesn't have any GL support, and in my pcb+gl,
> pcb+gl_experimental etc.. branches, the Lesstif GUI probably won't even
> build.
>
> Thanks for debugging this with me,

It is my pleasure to help you get the most out of my hardware.

Thanks,
~Eric