Undo function not working anymore?

BaukjeSpirit · **Posted:** Mon Sep 23, 2013 12:29 pm **(#1)**

GIMP Version: 2.8.4
Operating System: Windows
OS Version: Windows 7 64 bit
GIMP Experience: Beginner Level

Since I've been using my tablet, the undo function(ctrl+z) sometimes randomly stops functioning so I had to restart GIMP a couple of times. But the last few days it got worse and now it just doesn't work anymore, even when restarting GIMP.. It's neither working when I try to undo it manually.
Does anyone know how to fix this?

Mokonafan · **Posted:** Mon Sep 23, 2013 12:45 pm **(#2)**

Only Idea I have is restart the machine.
If not I don't know. :S

BaukjeSpirit · **Posted:** Mon Sep 23, 2013 1:02 pm **(#3)**

Hmm.. well it randomly works now again.. but still waiting for a solution because it's really annoying :/

K1TesseraEna · **Joined:** Sep 22, 2012 **Posts:** 2089 **Location:** US

BaukjeSpirit wrote:

Hmm.. well it randomly works now again.. but still waiting for a solution because it's really annoying :/

What are the settings in Edit>Preferences>Environment 'Max undo memory' and 'Min # of undo levels'?
Increase # and set undo memory to 2-3 GB. May also happen when too many images are open at once and memory cache
in gimp swap folder reaches its limit. If this doesn't help, sounds like a bug. You can try one more thing: if you know how to
use dynamic keys in gimp, try to set Undo operation to other combination of hot keys (temporarily) and see how it goes.

molly · **Joined:** Apr 07, 2010 **Posts:** 14182

Try what K1TesseraEna says first. It makes sense to me and should work, but if it doesn't, you say this just started after installing your tablet. Is there any settings you could change there. Or unplug your tablet and see if the undo feature still faults.. That would tell you if the tablet is the beast.

saulgoode · **Posted:** Mon Sep 23, 2013 2:28 pm **(#6)**

What are the contents of your Undo History dialog when it's not working?

ofnuts · **Joined:** Oct 25, 2010 **Posts:** 4812

It could also be a rogue script with unbalanced undo groups. Any error in the console?

merrak · **Posted:** Mon Sep 23, 2013 11:34 pm **(#8)**

I've had random features suddenly "break" when huge amounts of memory were processed by the undo feature. Emptying 3GB of memory from the undo queue seemed permanently lock the undo buttons.

BaukjeSpirit · **Posted:** Tue Sep 24, 2013 5:56 am **(#9)**

K1TesseraEna:
I've tried that, but it also happens when I draw my first line after I just started GIMP.

saulgoode:
I've checked the undo history window, it does save all the history, but I'm still not able to undo anything even when trying to do it manually.

ofnuts:
I have two windows 7 installations on my laptop, one for school and one for private use.
I have several scripts/plug-ins installed on my private windows installation but some of them are bugged and not working. Maybe that could be the problem? I've installed GIMP on my school windows installation too without any plug-ins, and today I noticed it doesn't have the undo problem there.

K1TesseraEna · **Joined:** Sep 22, 2012 **Posts:** 2089 **Location:** US

BaukjeSpirit wrote:

I've checked the undo history window, it does save all the history, but I'm still not able to undo anything even when trying to do it manually.

Does clicking on thumbnail in Undo History return image to the previous state?
It's just another way of making Undo operation.

BaukjeSpirit wrote:

ofnuts:
I have two windows 7 installations on my laptop, one for school and one for private use.
I have several scripts/plug-ins installed on my private windows installation but some of them are bugged and not working. Maybe that could be the problem? I've installed GIMP on my school windows installation too without any plug-ins, and today I noticed it doesn't have the undo problem there.

Installed scripts and plugins do not affect undo history. But execution of some 3rd party scripts and plugins can.
In GIMP documentation it reads: "Filters, and other actions performed by plugins or scripts, can be undone just like actions implemented by the GIMP core, but this requires them to make correct use of GIMP's Undo functions. If the code is not correct, a plugin can potentially corrupt the Undo History, so that not only the plugin but also previous actions can no longer properly be undone."

Mokonafan · **Posted:** Tue Sep 24, 2013 2:52 pm **(#11)**

Not really related but sometimes tablets have numbers on the top that show numbers, and you can assign the numbers to a function. Undo is one of the functions.

freen · **Joined:** Oct 06, 2013 **Posts:** 2

For what it's worth, I'm having exactly the same problem.

GIMP 2.8.4, Linux Mint 15, Wacom Bamboo.

Most irritating to have to restart GIMP all the time.

freen · **Joined:** Oct 06, 2013 **Posts:** 2

Further info...
This seems to have nothing to do with the preferences or available memory.
I am using the vanilla GIMP that comes with Linux Mint and no extra plugins.
Seems to be a bug.