ACL in Joomla

[Witchypaws]

HI I tried changing the max_input_vars to 2000

This did not fix it

to answer Dan C, I have 22 user groups in Joomla and a max execution time of 30

Can you see if this helps with your theory and let me know if you an idea how to fix the issue

[bighudsonnut]

I was having the same problem.  I reduced my Joomla permission groups to 12, and added max_input_vars = 2000 to php.ini and that seemed to fix it.  Not sure if it was the reducing permission group to 12 (another posting had said this fixed it for them), or whether it was the max_input_vars, but one of those two did.  One thing is that when I click on CiviCRM permissions, it does time out - I have to tell it to Wait, then it pops up.  Something is still different about CiviCRM permissions but at least I can fix the CiviCRM permission now.

[jgentles]

Thank you so much for your reply diegov. Your solution fixed it for me. I'm running Joomla 2.5.28 annd CiviCRM 4.5.6 if that help anyone.

Hi, I had the same situation here, so I'm registering what worked for me just in case someone got in trouble.
Taking a look at Apache log, I found that:

[Tue Dec 09 16:37:10.669746 2014] [:error] [pid 21787] [client xx.xx.xx.xx:xxxxx] PHP Warning:  Unknown: Input variables exceeded 1000. To increase the limit change max_input_vars in php.ini. in Unknown on line 0, referer: https://xpto.com/administrator/index.php?option=com_config&view=component&component=com_civicrm

So I found the line that deal with max_input_vars in php.ini, uncommented it and set the value do 2000. That seems to resolve the problem. I think this form is just too long, so PHP can't deal with that using its default.