[Bug 1864586] Re: plymouth does not ask for LUKS password and does not change tty properly
Launchpad Bug Tracker
1864586 at bugs.launchpad.net
Tue Mar 3 23:48:10 UTC 2020
This bug was fixed in the package plymouth - 0.9.4git20200109-0ubuntu3.2
---------------
plymouth (0.9.4git20200109-0ubuntu3.2) focal; urgency=medium
* debian/patches/git_assert_fix.patch:
- backport an assert fix from upstream git
-- Sebastien Bacher <seb128 at ubuntu.com> Tue, 03 Mar 2020 18:07:23
+0100
** Changed in: plymouth (Ubuntu Focal)
Status: Confirmed => Fix Released
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https://bugs.launchpad.net/bugs/1864586
Title:
plymouth does not ask for LUKS password and does not change tty
properly
Status in plymouth package in Ubuntu:
Fix Released
Status in plymouth source package in Focal:
Fix Released
Bug description:
I Installed focal from the daily-pending ISO image, timestamp
2020-02-21 07:52
In the installer I selected LVM + LUKS.
Upon reboot I am shown a text plymouth theme, which is an incorrect
screen size and the LUKS password prompt is missing. See attached
screenshot.
If you enter your LUKS key into the blank screen and press enter, boot
continues but gets stuck at the end. plymouth does not transition to
GDM. To get GDM to show, you need to switch to VT3 and back to VT1
with ctrl-alt-f3 and ctrl-alt-f1. GDM will then show and allow the
user to log in.
I did some research, and it seems on focal, the default plymouth theme
is bgrt, and is a part of the plymouth-theme-spinner package:
$ sudo update-alternatives --config default.plymouth
[sudo] password for ubuntu:
There are 2 choices for the alternative default.plymouth (providing /usr/share/plymouth/themes/default.plymouth).
Selection Path Priority Status
------------------------------------------------------------
* 0 /usr/share/plymouth/themes/bgrt/bgrt.plymouth 110 auto mode
1 /usr/share/plymouth/themes/bgrt/bgrt.plymouth 110 manual mode
2 /usr/share/plymouth/themes/ubuntu-logo/ubuntu-logo.plymouth 100 manual mode
$ sudo apt-file search /usr/share/plymouth/themes/bgrt/bgrt.plymouth
plymouth-theme-spinner: /usr/share/plymouth/themes/bgrt/bgrt.plymouth
plymouth-theme-spinner is not installed on eoan, and ubuntu-logo is
the only theme installed on eoan.
I attempted to remove plymouth-theme-spinner and change the plymouth
theme to ubuntu-logo, and it sort of works. plymouth can now change to
GDM without having to swap VTs, but the screen is totally blank and
there is no LUKS password prompt.
All of this is reproducible on a focal installed to KVM.
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