Snappy

Raspberry Pi 2/3: failed to umount /lib/modules and /lib/firmware

Bug #1647950 reported by gerald.yang on 2016-12-07

This bug report is a duplicate of: Bug #1574487: possibly unclean shutdown. Edit Remove

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	Snappy	In Progress	Low	John Lenton

Bug Description

I found some error messages during shutdown on Raspberry Pi 2/3,
- failed to umount /lib/modules
- failed to umount /lib/firmware

So I check those folders
gerald-yang-tw@localhost:~$ mount | grep pi2-kernel
/writable/system-data/var/lib/snapd/snaps/pi2-kernel_22.snap on /lib/modules type squashfs (ro,relatime)
/writable/system-data/var/lib/snapd/snaps/pi2-kernel_22.snap on /lib/modules type squashfs (ro,relatime)
/writable/system-data/var/lib/snapd/snaps/pi2-kernel_22.snap on /lib/firmware type squashfs (ro,relatime)
/writable/system-data/var/lib/snapd/snaps/pi2-kernel_22.snap on /lib/firmware type squashfs (ro,relatime)
/var/lib/snapd/snaps/pi2-kernel_22.snap on /snap/pi2-kernel/22 type squashfs (ro,relatime)
/var/lib/snapd/snaps/pi2-kernel_22.snap on /writable/system-data/snap/pi2-kernel/22 type squashfs (ro,relatime)

Somehow the kernel snap is mounted twice on both /lib/modules and /lib/firmware
But the UC16 for AMD64 doesn't have this issue, I think it might be the root cause that during shutdown, system fails to umount these two folders.

Revision history for this message

John Lenton (chipaca) wrote on 2016-12-07:

Yep! We're aware. In fact I thought we had a bug for this, but it looks like it was only in trello. There's a fix that's stuck behind some packaging issues that are getting resolved.

It does also affect amd64 (but it might be too quick to notice), btw.