Bug#976101: systemd: Offline update installation in systemd (via gnome-update) doesn't cleanly unmount filesystem

[Michael Biebl]

Am Sonntag, den 06.12.2020, 19:28 +0100 schrieb Michael Biebl:
> Am 06.12.20 um 17:04 schrieb Josh Jones:
> > It is the root filesystem which is failing to be remounted read-
> > only -
> > this is a simple setup with only one filesystem for the whole
> > system.
> > 
> > It seems to be happening right at the very very end of the shutdown
> > sequence - I have attached a picture of the error; quality is poor
> > because I had to capture it from video footage. Is there any way to
> > even have anything saved to disk so late in the sequence?
> 
> With the shutdown hook described in README.Debian and 
> https://freedesktop.org/wiki/Software/systemd/Debugging/#index2h1
> (install the hook as /lib/systemd/system-shutdown/debug.sh without
> the 
> /usr prefix) you can gather logs right until the end
> 
> 


Copy the attached script to /lib/systemd/system-shutdown/, make it
executable with chmod +x, then add 
systemd.log_level=debug systemd.log_target=kmsg log_buf_len=1M
to the kernel command line and after the reboot, attach the file
/shutdown-log.txt to this bug report.

Michael
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