I/O Error after clicking "reboot now" - Ubuntu font missing from casper shutdown

[Jacob Kim]

ubuntu Plymouth theme now correctly uses Ubuntu font, meaning it needs to be cached for display of the shutdown message.

We really should be using shutdown initramfs on the livecd....

--

Tested in Virtualbox VM.
Ubuntu MATE works after force-reboot, but after I click on "restart now" after completing the installation, the screen shows me this:

req_error: I/O error, dev sr0, sector 1488792

And the above message loops a couple times, and wont turn off the computer to restart.

No error happens after force reboot, and the OS boots properly, but I'm curious as to what's causing this.

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1760598

[Etienne Papegnies (etienne-papegnies)]

Just seen that with a Beta2 candidate install. https://i.imgur.com/wkGEGLF.png

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Marco Parillo (marco-parillo)]

Also affects Kubuntu.

[Launchpad Janitor (janitor)]

This bug was fixed in the package casper - 1.393

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casper (1.393) bionic; urgency=medium

  * Cache Ubuntu fonts for plymouth on shutdown. LP: #1760598

 -- Dimitri John Ledkov <email address hidden> Wed, 04 Apr 2018 11:55:32 +0100

[Dimitri John Ledkov (xnox)]

Keeping ubiquity task open; until after we respin, and test that this issue is gone. It is cosmetic, and the only side effect that one does not see the final message "please remove installation media and hit enter". I'm hoping the first daily after beta will be fixed.

[Harald Sitter (apachelogger)]

As explained in Bug #1761478 that would still leave timing issues. With --ping not blocking anymore casper-stop can shoot right past the prompt code on account of --ping coming back !0 (if plymouth isn't quick enough to start anyway). Meaning the user doesn't get told to remove the installation medium.

e.g. this is what I get in a VM now http://people.ubuntu.com/~apachelogger/screencasts/vokoscreen-2018-04-06_13-40-13.mkv