Xdebug stopped working, where do I look for errors?

On your server, try this command:

$ netstat -anp | grep CLOSE_WAIT

Any :9000 entries will give you XDebug troubles; consider kill -9 <pid>.

I had this problem too on Ubuntu after updating php. For me, turning on html errors in php.ini got xdebug with Netbeans to work again ...

sudo vi /etc/php5/apache2/php.ini
display_errors = On
html_errors = On

And restart apache:

sudo /etc/init.d/apache2 restart

http://ubuntuforums.org/showpost.php?p=9592364&postcount=14

At the end, left with only two solutions - to reinstall the Ubuntu OS or to install a new VM especially for xdebug, I'm going for the second one. Funny thing is, everything was working according to the "RTM" (f=freaking). One thing that I couldn't figure out is how to read the logs for XDebug in order to understand where the real problem is.

UPDATE

After some struggling, I deleted every single line related to xdebug from every php.ini that I had. And moved these lines to /etc/php5/conf.d/xdebug.ini. Restarted Apache, and then PHPStorm, and it works. P.S. in the middle, I tried to install xdebug with pecl, from github, and the standard Ubuntu version. I think the one that I compiled is currently working. And.. the log gets updated as well.

;xdebug configuration
zend_extension = /usr/lib/php5/20090626/xdebug.so
xdebug.remote_host = 127.0.0.1
xdebug.remote_enable = 1
xdebug.remote_port = 9000
xdebug.remote_handler = dbgp
xdebug.remote_mode = req
xdebug.profiler_enable=0
xdebug.profiler_enable_trigger=1
xdebug.remote_autostart=1
xdebug.idekey=PHPSTORM
xdebug.remote_log="/tmp/xdebug.log"