Exceptional. Thanks so much plg. Sorry for missing the solution on post 
All the best. I truly do love this software!
OK, suPHP/suExec was not a good direction.
The problem was ImageMagick 6.2.8 which doesn't support the sampling-factor, as described on post:131408
I have fixed your admin/include/image.class.php. We will provide a general fix for Piwigo 2.4.1
Private Message sent.
Thanks for looking plg.
You can find my site at images.tactibrand.com - (if you pm me I'll gladly share piwigo admin credentials if you want to poke around there)
safe_mode is off
PHP handler is suphp and Apache suEXEC is on (see screenshot)
It's a Linux box running Apache v3.13.1 if that matters.
Thank you for your detailed explanations.
Can you give the address of your Piwigo?
Do you know if PHP is in safe_mode?
Do you know if PHP is runned through suExec or suPHP?
Hi, I've read a lot of useful information on the issue, and thanks to flop25, plg, mistic100 (and http://piwigo.org/releases/2.4.0#multiple_size ) for help on other post. These are marked solved and none of the solutions helped me so I'd like to start a new thread and look for alternate answers.
I have a new install of 2.4 that I loaded today.
I am running off a VPS with PHP5.3 and MySQL5.0
When I upload images through Piwig, the thumbnails don't appear. I understang that they get cached 3 at a time but they never-ever show up.
Here is some troubleshooting I've done.
A) I've gone to Administration -> Batch Manager -> Selected an Image (sleep.jpg in this example) -> chosen an action -> Generated Multiple Sizes (square and thumbnail for this example) -_ applied action (and received a successful 2 images have been generated for this example)
B) Wait 30 minutes for cache to produce image in _data/i/upload/....
C) When I select the thumbnail Alt tag from FireBug, I get something like:
<img title="sleep (4 visits)" alt="sleep" data-src="i.php?/upload/2012/06/29/20120629120829-d82a2065-th.jpg" class="thumbnail" src="http://images.tactibrand.com/_data/i/upload/2012/06/29/20120629120829-d82a2065-th.jpg"> but the "alt" tag when I hover over the html in FireBug reads "failed to load the given URL"
D) Checked CHMOD on _data (777) and all sub-folders are (755) that seems right.
E) I've cleared browser cache (i.e in I.E and in Firefox) but the thumbnails never appear. I also checked the folder (in this case the resized image would have gone to _data/i/2012/06/29) but there are no images there. (although the folders did get created)
Note: my first attempt was with a bulk upload of images and a bulk "generate multiple sizes" and that didn't work so I tried just with a single image upload and a single image thumbnail creation to the same effect. I did clear the server cache (I think) through Tools -> Maintenance -> Purge Sessions before I tried the single image upload and thumbnail creation.
If anyone has advice on what I could try, I'd appreciate it.