Public bug reported:
Summary]
[ThinkPad]It will prompt error message after shutdown or reboot.
[Reproduce steps]
1. Preload Ubuntu OS 20.04.2
2. Boot and enter to the os
3. Shutdown or reboot the machine, it wouldn't show below error by default.
4. Then installed finalrd, and do reboot or shutdown.
Expected Result:
It will not prompt error message after shutdown or reboot.
Actual result:
It will prompt error message after shutdown or reboot as the attached 'the
page after shutdown or reboot.jpg'.
sd-umoun[2406]: Failed to unmount /oldroot: Device or resource busy
sd-umoun[2407]: Failed to unmount /oldroot/dev/pts: Device or resource busy
sd-umoun[2408]: Failed to unmount /oldroot/dev: Device or resource busy
shutdown[1]: Failed to finalize file systems, ignoring
We met this issue on several OEM projects, such as ThinkPad-P17-Gen-1,
ThinkPad X13.
[Additional information]
Platform: ThinkPad X1 Titanium Gen1, ThinkPad X13, ThinkPad P17
systemd:245.4-4ubuntu3.11
finalrd: 6~ubuntu20.04.1
** Affects: oem-priority
Importance: Undecided
Status: New
** Affects: finalrd (Ubuntu)
Importance: Undecided
Status: New
** Tags: oem-priority originate-from-1927884 sutton
** Attachment added: "the page after shutdown or reboot.jpg"
https://bugs.launchpad.net/bugs/1940514/+attachment/5519044/+files/the%20page%20after%20shutdown%20or%20reboot.jpg
** Tags added: oem-priority originate-from-1927884 sutton
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https://bugs.launchpad.net/bugs/1940514
Title:
It will prompt "Failed to unmount /oldroot" when shutdown or reboot
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