I hope someone here will help with a problem that repeatedly happens and basically (overnight, it seems!) has made GIMP unusable:

I open a photo.  Highlight some area.  Hit either Edit > Cut, Edit > Copy, or Cntl-x or Cntl-c, and poof, GIMP crashes.  Every time.

It doesn't seem to matter the size of the document or area I'm trying to copy.

I saw some thread on another forum saying if on has CopyQ installed that may cause issues, but I don't believe I do.  (I'm running Lubuntu 20.04LTS, a vanilla install, nothing modified.  It's LXQt, if that matters.  And my system is a newish Dell with 40GB of RAM, so I doubt it's a memory problem.)

I desperately need to fix this or find a work around.  Here's the output when I run GIMP from the command line:

me@home:~$ gimp
using gegl copy

(gimp:248888): Gdk-CRITICAL **: 22:06:25.414: IA__gdk_window_get_events: assertion 'GDK_IS_WINDOW (window)' failed

(gimp:248888): Gdk-CRITICAL **: 22:06:25.414: IA__gdk_window_set_events: assertion 'GDK_IS_WINDOW (window)' failed
The program 'gimp' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadWindow (invalid Window parameter)'.
(Details: serial 95997 error_code 3 request_code 18 minor_code 0)
(Note to programmers: normally, X errors are reported asynchronously;
that is, you will receive the error a while after causing it.
To debug your program, run it with the --sync command line
option to change this behavior. You can then get a meaningful
backtrace from your debugger if you break on the gdk_x_error() function.)

(script-fu:248910): LibGimpBase-WARNING **: 22:06:25.457: script-fu: gimp_wire_read(): error

Thank you in advance for any help.

I followed this tutorial but when I get to the point of applying or hitting okay the progress bar comes up for a couple of seconds but nothing happens. Any insight as to how to make this work?

Remove Anything From A Photograph in Gimp using GMIC

I rotated the screen capture 90 degrees because it would be too long vertically.

As you see below, even though I have changed the UI font size by editing the "gtkrc" file, the icons does not seem to scale. Those images seem to be from share\gimp\2.0\icons\Symbolic-High-Contrast\scalable\apps, and they are vector images (.svg), but they don't scale at all. Whether at I choose Preference->Interface->Icon Theme "Guess icon size from resolution" or "Custom icon size = Huge", the menu icon size does not change.

Is there any way to change the menu icon size? Or is this a bug and there is currently no way to change the menu icon size?

[I’ve been using GIMP for a couple of months.  After creating a new document 11x17 inches, 300dpi, I export a pdf and take it to the printer who says the document is actually over 50” wide.  I’ve spent a lot of time trying to get this right, including watching several instructional videos. 

Maybe when I bring artwork that was shot on my iPhone into GIMP the canvas size changes?  I don’t understand what’s happening here.

Can you help?

Thank you.
I’m using a MacBook Pro, Catalina 10.15.7

Hi,
When creating a preset in Curves using the option:
Save the current settings as named preset, where is this preset saved? in which file?

I searched the drive C:/  but returned nothing in the search.

Thank you

Hi everyone

I have a set of Clip Studio Paint brushes in the .sut format.
I can't open them with GIMP.

Do you know how to convert those files into .gbr or any other readable format?

Thank you!

jpeg is 349 X 459. How do I print it so it fills up 8-1/2" X 11 sheet?

I did this once before, but the image just prints a lot smaller.

Using HP Office-Jet Pro 6970. Can't remember what printer I used before.

I have the following in a file, but how do i turn it. (see screenshot) using "APR" I ant to tun it around so it will for and looks like 3rd picture.

I need to change a few of the single color ones, and then change the few in the one with all of them.

I want to change APR, MEI, JUN, JUl and AUG.

I did add one to how I need it.

Just need help with only one, the others I will then trying to do them.

I have spent the last 6 HOURS trying to do one simple thing, transform a rectangular image into a right triangle without distorting the pixel placement vertically. I have used EVERY transform tool, looked through every filter, and for the life of me I cannot figure out how to do this. So PLEASE if anyone can tell me if this is possible, and if so how I can do it, it would be greatly appreciated.

Hi,
    I am adding two signatures from jpg into a pdf document (well no, I changed one of the jpgs to xcf, but this problem occurs with the 2nd sig added, no matter the format).
1. Open pdf as layers
2. open the signature file as layers
3. put the signature file onto the document
4. Select Darken only and position the signature
5. Select "merge down" for the signature layer
6. It saves fine into the PDF

BUT, when I do this for the 2nd signature, as soon as I do "merge down", the signature vanishes. I have a feeling this has something to do with layers getting in each other's way or something, but I have no idea how to fix.

I also put in two text fields near by with the date.  I did not need to use merge down or darken for those fields and they also worked with the single signature as well as the vanished signature. 

What am I doing wrong?

-Bob