David J. Biesack wrote:
I recently migrated a MediaWiki installation (1.4.0)
from one server to another (1.4.5).
The database migrated fine; images appear to have migrated fine as well,
but thumbnails are not working.
I'm not sure how MediaWiki processes thumbnail images... could it be a permission
problem, for example? What maps an image name to the "default" thumbnail if no
size is given? If it cannot find a thumbnail, will MediaWiki not render a thumbnail?
I have not changed DefaultSettings.php:
$wgUseImageResize = false;
$wgUseSharedUploads = false;
First, never change DefaultSettings.php. You should always add changes
at the bottom of LocalSettings.php (or at least after the line that
includes DefaultSettings.php).
MediaWiki uses either the built-in PHP image resizing functions or the
more versatile ImageMagick application if that's installed. The setup
script will detect either one and automatically enable them if they are
installed.
But, the key line is
$wgUseImageResize = false;
As you can see if you read a bit more closely, you have thumbnails (made
by resizing the original image) disabled. Change that line to true and
see if that solves your problem.
Hínandil