Question White screen - in front end and back end

I was making some initial settings to the overall configuration of Kunena forums and when I clicked save it gave me white screen - in both the frontend and backend.

I don't remember exactly what I changed and I don't have a configuration panel to jog my memory.

Running Kunena 1.5.11 on Joomla 1.5.18.

I can't figure out how to reset the configuration settings.

Has anyone had this happen before?

Anyone know how to reset the config?

Thanks,
D.

See Reset Kunena settings . I don't know if this will cure your "white screen" issues and, for those, see How to diagnose blank page on kunena for further help.

I reviewed the documents about proper setup and everything was good to go before I made the configuration change.

I see at least one other person has reported this problem occurring specifically upon a configuration change.

I want to emphasis that I had a working Kunena for over a month that I had been getting familiar with before releasing it. Created forums and posts. Had it displaying publicly. Then when I made one set of configuration changes it went whitescreen.

I turned on php errors as suggested and these are the errors I receive on the backend and front end:

Fatal error: Allowed memory size of 16777216 bytes exhausted (tried to allocate 23040 bytes) in /data_csi/joomla/components/com_comprofiler/plugin/user/plug_cbmenu/cb.menu.php on line 1389

*** Then I disabled the CB menu plugin and I get:
Fatal error: Allowed memory size of 16777216 bytes exhausted (tried to allocate 92160 bytes) in /data_csi/joomla/components/com_comprofiler/plugin/user/plug_cbmamboauthortab/cb.authortab.php on line 103

CB itself is working fine - only get these errors when trying to access Kunena.

Since the post you referred me to referenced the two configuration tables I exported and compared them and then test putting each setting back individually. (Thanks for having the backup config Kunena!)

If either the avatar or the profile are set to CB, I get this above out of memory error.

I know how to increase my page size - but isn't a page over 16 MB a little large just to support a forum?

If it is not a bug, surely the code could be streamlined to not generate pages this large?

With this new information is there anyway I can set the profile and avatar to CB and not generate such large pages? Is there another setting in CB or Kunena driving up the required page size?

Thanks,
D.

PS If someone gets a white screen or blank screen upon changing the configuration I would recommend they compare #_fb_config to #_fb_config_backup as their first step.

I tested for the minimum amount I could increase the php.ini memory_limit by and I can't go below 20M and have the backend load successfully.

I would really like to see the code be more efficient, but a couple other changes you might consider to prevent this frustrating experience:
*) Don't load CB integration in the backend so that it will keep working to be able to fix the problem.
*) Make php memory_limit recommendation of 20M
*) Give a warning when profile or avatar are changed to CB and memory_limit is at default of 16M
*) Have a "revert to previous config" button in the backend AND a script that can be run from the command line. Have both of them REPORT the differences between the current config and backup config so that the admin can do less guessing about exactly what setting upset Kunena. This would help immensely with all configuration based disablements.

Regarding to this issue:

16MB of memory is too low even for Joomla itself. PHP is very inefficient on memory usage and you can spend 10MB just by including a bunch of php files -- never running a single line of code in them! Minimum requirements for Joomla is about 32-64MB, if you want to have anything in your site.

Kunena itself works usually with 16MB of memory (8-12MB with basic Joomla installation), but you probably added CB and a few modules and plugins into your site. Every added component will eat some memory, and usually we are talking megabytes, not kilobytes.

1) CB integration is loaded to check that it works.. Good idea though..
2) Our PHP memory recommendation has always been 64MB: docs.kunena.com/index.php/Technical_Requirements
3) Good idea, but it really depends on the site and your configuration. I can run Kunena with 4MB of memory by using Zend Optimizer+. Without optimizer it takes 12MB of memory to load the same page.
4) We already have all of this in K1.6 (well, with default setting). Previous is a good idea, too.

What you can do, is to go to phpmyadmin, delete jos_fb_config and rename jos_fb_config_bak to the original name. Or if you want to have default config, just delete the current one.