Arch Linux

Mef

Member

Registered: 2015-02-25

Posts: 6

[SOLVED] Reboot hangs when an LVM snapshot is present

Hello everyone,

I'm having this issue with LVM. I make a fresh Arch install, either on my laptop or in virtualbox, using an lvm partition for root and swap.
Everything works well until I take a snapshot of the root partition. The system hangs for about 2-3 minutes whenever I reboot / shutdown the computer.

journalctl either doesn't show anything special, or sometimes shows:
lvm [pid]: There are still devices being monitored
lvm [pid]: Refusing to exit

as seen here it seems related to lvm monitoring, and typing vgchange --monitor n indeed prevents the computer from hanging.

Though I see this more as a workaround than a real solving.

I have also tried to downgrade the lvm2 package but the issue persists.

Has anyone else experienced this? Or been able to reproduce it in virtualbox?
I'm considering switching from lvm to btrfs because of this.

Last edited by Mef (2016-11-12 22:52:16)

Mef

Member

Registered: 2015-02-25

Posts: 6

Re: [SOLVED] Reboot hangs when an LVM snapshot is present

So I found what was causing the issue, the lvm2-monitor.service needs to be enabled.