@mpaolo I guess you are using the Matomo 3.5.0 release candidate, correct?
Did you enable the new Geoip2 plugin manually? Were you using the https://github.com/diabl0/piwik-geoip2 plugin before?

@sgiehl Did you test what happens when one is using the old Geoip2 plugin at the same time as the new version?

@Findus23 actually not with the current implementation

ATM I just renamed such GeoIp2.php to GeoIp2_php, and got matomo back working ...

@Findus23 yep, on 3.5.0-rc1, Ii think switched to GeoIP PECL time ago, don't remember Ii installed that geopi2 plugin but I see it's installed & active

thx

@mpaolo Do you by chance have a geoip2 or similar folder in /var/www/piwik/plugins/ in addition to the GeoIp2 folder? If so it may help removing it and disabling it in config/config.php.ini and then using the new Geoip2 plugin.

ok, seems the usual mismatch/interference between old/new/different implementations.
Since I'm using a different geoip module I guess I'm fine and indeed a quick test confirms geo infos are fine.
So I'll just wait for instructions.

@Findus23 :
/var/www/piwik# locate geoip2|sed -r 's,[^/]+$,,'|sort|uniq
/var/www/piwik/plugins/GeoIP2/vendor/
/var/www/piwik/plugins/GeoIP2/vendor/geoip2/
/var/www/piwik/plugins/GeoIP2/vendor/geoip2/geoip2/
/var/www/piwik/plugins/GeoIP2/vendor/geoip2/geoip2/src/
/var/www/piwik/plugins/GeoIP2/vendor/geoip2/geoip2/src/Database/
/var/www/piwik/plugins/GeoIP2/vendor/geoip2/geoip2/src/Exception/
/var/www/piwik/plugins/GeoIP2/vendor/geoip2/geoip2/src/Model/
/var/www/piwik/plugins/GeoIP2/vendor/geoip2/geoip2/src/Record/
/var/www/piwik/plugins/GeoIP2/vendor/geoip2/geoip2/src/WebService/

oh oh, but there are:
/var/www/piwik/plugins/GeoIp2
/var/www/piwik/plugins/GeoIP2
which one is right?

GeoIp2. The other one is a non-core plugin, that shouldn't be used anymore

hm, so Ii moved out GeoIP2 and renamed the .php, but now the plugin is inactive and I get a waring saying -rc1 is not compat with GeoIP2 plugin

that because the plugin entry is still in the list in config.ini.php. You can remove it manually from that list, or click uninstall if thats possible...

ok, things are becoming a bit messy ...

• activating the plugin stepped through database update
• then integrity check wants to remove vendor/maxmind-db/reader/autoload.php
• PECL geoip no more available, 2 verzions of geopip2 available but not installed (so it says)
• warning about to be discontinued maxmind db support etc
• went through the download&install free geoip db, then geopi2 turned 'installed'
• selected such geopi2, removed such autoload.php, GeoIP2 entries from ini file
  now all seems fine, all warnings gone.
  Guess we can close the issue then - thx @ALL :)

then integrity check wants to remove vendor/maxmind-db/reader/autoload.php

This is a known issue. The file won't be included in next release