Thread:Project:Support desk/Errors when using GD image library

I'm seeing blank pages when I attempt to use GD as the image library as opposed to ImageMagick.

I've got an old MediaWiki site that I've just upgraded from version 1.8.2 to 1.24.0. I also installed a completely fresh copy of 1.24.0 onto the same server. When I set them both to use ImageMagick I receive errors about proc_open being disabled at the top of the page and, although pages will load, the images won't and instead say:

Error creating thumbnail: Unable to run external programs, proc_open is disabled. Error code: 1

Essentially my host has disabled proc_open for security.

So I try to use GD instead. The fresh installation lets me upload new images and add them to pages, then it creates the thumbnails as it should. All works fine with GD. The upgraded site, however, just goes to a blank page after pressing the upload button. It also shows a blank page on several pages that have images (ie the same pages that would have the above error if using ImageMagick), eg Gallery of new images, and File list.

It appears that I can't use ImageMagick due to proc_open being disabled. But does anyone know why GD would work fine on one installation but not on another?

The errors that appear when loading those blank pages look like: PasteBin

I'm using:
 * PHP: 5.3.29
 * MySQL: 5.6.22
 * MW: 1.24.0

Thanks