I'm still able to reproduce this issue on Ubuntu 15.04 with PCManFM 1.2.3-1.1 except that I'm seeing sort_type in [ui] and not [desktop]. It also seems that this configuration file got outdated over time even more. That you are not able to find the related file could be a result that you are using Lubuntu and not Ubuntu. But I would normally assume that Lubuntu has somewhere a pcmanfm.conf too. But PCManFM corrects the configuration file if it gets started the first time (to see the invalid entries you have to use a terminal after login into the desktop). Maybe the file don't even need to be created at all if PCManFM would take care of it anyways. Otherwise the file needs a complete rechecking (at least on Ubuntu but maybe also on Lubuntu).
** Changed in: pcmanfm (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1027257 Title: Wrong configuration values To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pcmanfm/+bug/1027257/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs