Comment 4 for bug 1068947

(Bwarf, you used regression-release and not regression-alert... I misread, sorry.)

Anyway, support of lvm partitions is a bit flaky, I'm not sure if it depends on Thunar, gvfs or udev. For example, previously, too many volumes were shown (Bug #876823, I had to use udev rules with UDISKS_PRESENTATION_HIDE to hide them), but the code in Thunar hasn't changed much since then, so it's probably a change of behavior in gvfs/udev/something else.

If you have a machine to do some tests, you can try the new development release of thunar (1.5.0, will become 1.6.0 with Xfce 4.12) at <https://launchpad.net/~xubuntu-dev/+archive/xfce-4.12>. The sidepane and mounting code has been rewritten, so maybe your issue is fixed already. You can also try with another gtk file manager, like nautilus or pcmanfm.