STINGER wibblywobblyteapot.co.uk wrote:

If I use the paths tool and drag to move I get a horrible green mess of breadcrumbs where the tool has been.

Looks like http://bugzilla.gnome.org/show_bug.cgi?id=421466

The cause is a driver problem, the workaround is to add

(xor-color (color-rgb 1.0 1.0 1.0))

to your gimprc

/ Martin

On Friday 29 May 2009 17:48, STINGER wibblywobblyteapot.co.uk wrote:

Hi,

I've googled and googled but I can't find a cure for my misconfiguration of GIMP (?) Can somebody help me?

If I use the paths tool and drag to move I get a horrible green mess of breadcrumbs where the tool has been. I also get this on any other tools when moving around. I've tried it on two different machines now (both running Ubuntu) and I can't stop it.

Probably easier to show some pictures of what I am getting;

http://62.233.82.168/images/gimpmess2.png http://62.233.82.168/images/gimpmess1.png

If anyone can tell me the setting I've missed to stop this messy behaviour I would be very grateful. Thanks (and be gentle). I'm trying to learn this after years of working with Paint Shop Pro and it's tough going...

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Looks like a driver error to me.
What card/driver do you use?

On Fri, 2009-05-29 at 16:48 +0100, STINGER wibblywobblyteapot.co.uk wrote:

If I use the paths tool and drag to move I get a horrible green mess of breadcrumbs where the tool has been. I also get this on any other tools when moving around. I've tried it on two different machines now (both running Ubuntu) and I can't stop it.

I've seen this before though its been awhile. I'm pretty sure it comes from GIMPs interaction with particular X drivers, but I can't remember if it was nVidia or Intel. I think it was nVidia. If you have an nVidia card, there are two drivers: the open source "nouveau" and the nVidia provided "nvidia". Whichever driver you're using, try switching to the other driver and see if that helps.

Oh wait, you're using Ubuntu. Don't know if nVidia's driver is available in .deb packaging. I use Fedora and there are RPMs for it. Guess you'll just have to dig around for it.

You can also try disabling 3D acceleration to see if that helps. Some of the 3D driver support caused problems on intel graphics chips for awhile. I disable all 3D fluff on my systems since I don't play games and don't really need it anywhere else.

Sorry I can't be more helpful. I just don't remember what I did that cleared the problem.

STINGER wibblywobblyteapot.co.uk writes:

If I use the paths tool and drag to move I get a horrible green mess of breadcrumbs where the tool has been. I also get this on any other tools when moving around. I've tried it on two different machines now (both running Ubuntu) and I can't stop it.

Do the green lines go away if you redraw the window? (For example, cover it with another window then uncover it.) Do the two machines have similar video cards?

Artifacts like that are usually bugs in the video driver. I see them sometimes with ATI graphics cards, especially older Radeons. They usually seem to come from drawing with an XOR operation ... apparently some video drivers, especially the ati/radeon driver, can't handle that quite right. (It may be the hardware not handling it right -- looking at bugzilla it looks like the problem happens with ATI cards on Windows as well.)

Here's a bugzilla bug that discussed the problem, some time back, with lots of duplicates, some of which have screenshots that look a lot like yours:
http://bugzilla.gnome.org/show_bug.cgi?id=421466

A comment in that bug suggests adding the following line to your gimprc file (located in your gimp profile, ~/.gimp-2.6/gimprc):

(xor-color (color-rgb 1.0 1.0 1.0))

Try that and see if it helps.

Good luck!

...Akkana