Comment # 42 on bug 902779 from Thomas Blume

(In reply to Sebastian Kuhne from comment #41)
> 
> OK, executed and attached, with udev_log="debug" and as root.

Unfortunately, the udev verbose log is still not visible in the logs.
However, the problem is visible, after mounting swap and home, there is a delay
of about 45s:

-->--
Jan 15 16:21:53 linux-1r76 systemd-fsck[430]: /dev/sda6: clean, 75903/18096128
files, 64059249/72373334 blocks
Jan 15 16:21:53 linux-1r76 kernel: Adding 2104476k swap on /dev/sda1. 
Priority:-1 extents:1 across:2104476k FS
Jan 15 16:21:55 linux-1r76 kernel: EXT4-fs (sda6): mounted filesystem with
ordered data mode. Opts: (null)
Jan 15 16:22:40 linux-1r76 kernel: usbcore: registered new interface driver
snd-usb-audio
Jan 15 16:22:40 linux-1r76 lvm[444]: WARNING: lvmetad is running but disabled.
Restart lvmetad before enabling it!
Jan 15 16:22:41 linux-1r76 lvm[444]: No volume groups found
Jan 15 16:22:41 linux-1r76 lvm[446]: WARNING: lvmetad is running but disabled.
Restart lvmetad before enabling it!
Jan 15 16:22:41 linux-1r76 lvm[446]: No volume groups found
--<--

Strange are the lvm messages. 
It seems you don't have any lvm setup.
Can you confirm this?
If so, please edit /etc/lvm/lvm.conf and change the use_lvmetad parameter to:

use_lvmetad = 0

In addition, please deactivate the lvmetad socket via:

systemctl disable lvm2-lvmetad.socket

I have tried to reproduce the problem with the latest factory build (20150107)
but couldn't see any of the above problems.
So I would recommend that you update your test system to latest factory before
you do the next tests.

If it still doesn't work with the above settings, please provide the output of
journalctl -axb again (please keep udev_log="debug" in /etc/udev/udev.conf).