Steve asked today: <vorlon> fjp: I'm confused why bug #403687 is marked as RC, instead of bug #402511 I've decided to answer by mail instead of on IRC because this issue probably needs some coordination between maintainers of several packages. It looks certain that #402511, and probably also #401393 were introduced by this change in udev (0.103-1): * udev.rules, devfs.rules: stop suppressing creation of dm-* devices, because they are needed by HAL. (Closes: #392623) The second line in this snippet from /etc/udev/udev.rules was dropped: # device mapper creates its own device nodes, so ignore these KERNEL=="dm-[0-9]*", NAME="" KERNEL=="device-mapper", NAME="mapper/control" The reason I filed #402511 as important is because, although it is a clear regression and IMHO rather ugly, it is still mostly a cosmetic issue. It looks like vgchange just loops over all /dev/dm-* devices and checks if any of them are LVM volumes, and prints an error if a device does not exist. My conclusion is that udev now creates /dev/dm-* device nodes for cryto devices (and possibly other dm devices too), but nothing yet takes responsibility for _deleting_ them when the corresponding crypto devices are brought down . This looks like a structural issue, but I have no idea if that should be the responsibility of the device mapper, udev or cryptsetup. I also wonder what the risk is of other, not yet reported, issues introduced by the change in udev. The reason I filed #403687 as RC is because IMO it is the _combination_ of several issues introduced by the change in udev that needs to be looked at before the release. I have no idea how important the HAL-support is, but the regressions it introduced seem serious enough to consider revering it. IMO the management of /dev/dm-* devices is something that needs to be looked into structurally by maintainers of _all_ involved packages (probably also dmraid), I'll leave it to others whether that needs to be done before or after the release. Cheers, FJP  The crypto devices in /dev/mapper/ *are* correctly removed after S48cryptdisks has run, but the corresponding /dev/dm-* devices are not.
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