GIMP's GEGL C2G operation hangs

Bug #1514199 reported by Esteve Boix on 2015-11-08
10
This bug affects 2 people
Affects Status Importance Assigned to Milestone
gimp (Ubuntu)
Medium
Unassigned

Bug Description

When I run GEGL's C2G operator:

- The operation hangs (it does not crash, it just hangs) more or less in the middle of the process.

- The operator works in rectangles. Some of these rectangles are obviously darker than the rest of the image.

- I takes way longer than before. Maybe the parameters have changed their meaning or the internals have changed, and the iterations and samples have to be lower. I don't know right now.

I usually run at a radius of 1600, 40 samples, 20 iterations on 16MPix images (4928 x 3264).

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: gimp 2.8.14-1ubuntu2
ProcVersionSignature: Ubuntu 4.2.0-17.21-generic 4.2.3
Uname: Linux 4.2.0-17-generic x86_64
ApportVersion: 2.19.1-0ubuntu4
Architecture: amd64
CurrentDesktop: GNOME
Date: Sun Nov 8 15:56:51 2015
InstallationDate: Installed on 2014-12-22 (320 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
SourcePackage: gimp
UpgradeStatus: No upgrade log present (probably fresh install)

Esteve Boix (esteveb) wrote :
Esteve Boix (esteveb) wrote :

I've done further testing.

With smaller images, thus lower radius and iterations/samples, the problem still arises.

I've done some tests with the "gegl" command line command, and it works just fine. I can definitely apply the operator with something like:

gegl -p -o /home/esteve/1.png -x "<gegl><node operation='gegl:c2g'><params><param name='radius'>1800</param><param name='samples'>16</param><param name='iterations'>16</param></params></node><node operation='gegl:load'><params><param name='path'>/home/esteve/2.png</param></params></node></gegl>"

It applies the operation and saves the result, so I'd say the problem resides in the GIMP, not in GEGL, or at least in the link between the two.

Esteve Boix (esteveb) wrote :

Just as a final test, I've installed Ubuntu 15.10 clean, in a virtual machine (KVM), and the problem also appears there.

Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in gimp (Ubuntu):
status: New → Confirmed
Changed in gimp (Ubuntu):
importance: Undecided → Medium
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