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Re: gEDA-user: pcb+gl minor polygons glitch

On Wed, 2011-05-11 at 22:39 +0100, Thomas Oldbury wrote:
> On my ThinkPad X201, I am encountering a minor issue with PCB+GL... Not
>    a show stopper, but a bit annoying. I notice that when I move the
>    cursor, occasionally a random triangle extending from the middle of the
>    board to the outer edge will be highlighted. I'm using Ubuntu 10.10 and
>    the GPU is an Intel of some sort, not sure exactly which one. There
>    seems to be no definite pattern... is this a confirmed bug with PCB+GL
>    or just a glitch with my laptop/software combination?

It would be worth re-fetching again now, and checking if this still
occurs with the latest fixes I've applied. It is just possible that the
incorrect state I had set which resulted in missing crosshair attached
objects caused a problem.

Could you send me the contents of the output of the command:


and a copy of your /var/log/Xorg.0.log

This is to identify exactly what graphics card and driver you are using.

I have certainly heard (and seen) reports of a similar sounding artefact
from one other Intel GPU based machine. I don't see it here on mine, but
I'd love to get to the bottom of it.

Since I can get physical access to the other laptop this was reported
on, if you could send a video to confirm we're looking at the same kind
of bug, I might be able to do some tracing and debug work here - perhaps
enough to send the Intel driver developers a clueful bug report to get
their driver fixed (assuming it is a driver issue).

Best wishes,

Peter Clifton

Electrical Engineering Division,
Engineering Department,
University of Cambridge,
9, JJ Thomson Avenue,

Tel: +44 (0)7729 980173 - (No signal in the lab!)
Tel: +44 (0)1223 748328 - (Shared lab phone, ask for me)

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