GNOME Bugzilla – Bug 314906
Setting a layer's mode to Lighten Only causes lines to appear
Last modified: 2008-01-15 12:59:36 UTC
Please describe the problem: Setting a layer's mode to Lighten Only causes vertical lines to appear around the layer's contents Steps to reproduce: 1.Create a layer above a background layer 2.Make sure upper layer is brighter than background layer 3.Set upper layer's mode to "Lighten Only" Actual results: Vertical lines appear around layer's contents Expected results: Does this happen every time? Yes. The effect is more noticeable with text Other information:
I can't replicate this with cvs GIMP. The best way to be sure I am looking at the right thing would be if you could provide an xcf file for a sample image that gives you this problem, and a screenshot showing how it appears on your system. It might also be helpful to tell us what OS you are using. In the past, problems vaguely reminiscent of this have turned out sometimes to come from faulty graphics accelerators, so it might be good to know what sort of acceleration your system is using. If you could try reducing the level of acceleration, and see whether there is any effect on the appearance, that would be even better.
The bug reporter should try to disable CPU acceleration by using the --no-cpu-accel command-line option.
Created attachment 51743 [details] Showing the lines when Lighten Only is selected It only appears to be visible when running Gimp. When I exported to a Jpeg the lines were not there. I am running a Pentium 4 HT on Windowx XP Pro with a ATI X700 PCIE card. All the other layer modes (normal, multiply) seem to work fine.
The Ubuntu bugzilla has http://bugzilla.ubuntu.com/show_bug.cgi?id=15218 about that.
according to the Ubuntu bug submitter, using --no-cpu-accel fixes the issue.
*** This bug has been marked as a duplicate of 164061 ***