[Qgis-developer] Lines are invisible in GRASS plugin

[qgis at rigacci.org]

I'm investigating a strange problem, the same QGIS-GRASS plugin 
behave differently on three different machines.

On two machines no problems (just some crashes), on the third 
machine:

I add a GRASS vector layer (lines), the layer is correctly 
displayed.

When I start the Edit GRASS vector layer, the window pops-up, but 
the lines disappear. Also the nodes are invisible.

The plugin is functional: I can add a line and I see the gray 
line untill I close it, then it becomes invisible. When I close 
the Edit plugin, the GRASS layer become visible again and 
contains the new line too.

One more thing: if the GRASS layer is above another layer (say a 
GPX), when I start the Edit plugin, the lines appears just where 
they intersect objects in the under layer.

I include two snapshots (Grass layer is red, GPX is gray):

- Normal:  http://paros.rigacci.org/tmp/qgis-no-edit.jpg
- Editing: http://paros.rigacci.org/tmp/qgis-grass-edit.jpg
 

In what direction can I investigate? QT? X-Window? ...?

- I start QGIS standalone, not within the GRASS shell.
- All the machines are Debian Testing lined up at the same day.
- The QGIS is a build from SVN, made on 2006-08-31.
- If I open the GRASS mapset inside GRASS 6.2beta1 (the one used to 
  compile my QGIS) the v.digit works as expected.
- I tried to increase the line width and change the color into
  the plugin: nope. The rendering of lines is broken.

-- 
Niccolo Rigacci
Firenze - Italy

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