passphrase input-box for encrypted disk is not shown

Asked by sudodus

Iso-testing Lubuntu Alternate i386 iso file, testcase 'Alternate Install (Encryption) in Lubuntu Alternate i386 in Xenial Xerus Daily (alias Alpha1 in this case)

The bug appears in the installed system:

The passphrase input-box for encrypted disk is not shown (and the plymouth dots are not shown either, only a dark blue background). Pressing some of the

ctrl + alt + (F1-F7) keys

and after that


brings a text screen with the text 'Please unlock disk sda5_crypt', and it is possible to enter the passphrase, and I arrive at the login screen.

(Otherwise the encrypted disk and also encrypted home work.)

A better workaround (than hitting ctrl+alt+(F1-F7) keys and then Escape)
is to remove the boot options 'splash $vt_handoff'

You can do it 'live' after pressing the left shift key during boot and then the 'e' key.


You can actually enter the passphase while the dark blue screen (in Lubuntu) is displayed (without any help text and without feedback stars or dots). But it is confusing and would make most users think that the boot has failed. I did not think of it until I had a nights sleep ;-)

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: plymouth 0.9.2-3ubuntu8
ProcVersionSignature: Ubuntu 4.3.0-2.11-generic 4.3.0
Uname: Linux 4.3.0-2-generic i686
ApportVersion: 2.19.3-0ubuntu2
Architecture: i386
CurrentDesktop: LXDE
Date: Sat Jan 2 15:50:33 2016
DefaultPlymouth: /usr/share/plymouth/themes/lubuntu-logo/lubuntu-logo.plymouth
EcryptfsInUse: Yes
InstallationDate: Installed on 2016-01-02 (0 days ago)
InstallationMedia: Lubuntu 16.04 LTS "Xenial Xerus" - Alpha i386 (20160102)
ProcCmdLine: BOOT_IMAGE=/vmlinuz-4.3.0-2-generic root=/dev/mapper/hostname--vg-root ro quiet splash vt.handoff=7
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.3.0-2-generic root=/dev/mapper/hostname--vg-root ro quiet splash vt.handoff=7
SourcePackage: plymouth
TextPlymouth: /usr/share/plymouth/themes/lubuntu-text/lubuntu-text.plymouth
UdevLog: Error: [Errno 2] Filen eller katalogen finns inte: '/var/log/udev'
UpgradeStatus: No upgrade log present (probably fresh install) 09/24/2012
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: 6.10
dmi.board.asset.tag: Type2 - Board Asset Tag PLCSF8
dmi.board.vendor: Intel
dmi.board.version: Type2 - Board Version
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: OEM Chassis Manufacturer
dmi.chassis.version: OEM Chassis Version
dmi.modalias: dmi:bvnInsydeCorp.:bvr6.10:bd09/24/2012:svnTOSHIBA:pnSATELLITEPROC850-19W:pvrPSCBXE-00C00VN5:rvnIntel:rnPLCSF8:rvrType2-BoardVersion:cvnOEMChassisManufacturer:ct10:cvrOEMChassisVersion: SATELLITE PRO C850-19W
dmi.product.version: PSCBXE-00C00VN5
dmi.sys.vendor: TOSHIBA

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Megan Rizzo (megrizzo33) said :

WARNING: Signed boot verification is disabled; enabling it for security.
You can disable it again using: sudo crossystem dev_boot_signed_only=0
Installing xenial-armhf chroot to /usr/local/chroots/xenial
Downloading latest debootstrap...
Download from Debian gitweb failed. Trying latest release...
2017-06-01 22:17:29 URL: [7115/7115] -> "-" [1]
Downloading debootstrap version 1.0.90...
2017-06-01 22:17:29 URL: [69936/69936] -> "-" [1]
Patching debootstrap...
Downloading bootstrap files...
W: Cannot check Release signature; keyring file not available /usr/share/keyrings/ubuntu-archive-keyring.gpg

Revision history for this message
Launchpad Janitor (janitor) said :

This question was expired because it remained in the 'Open' state without activity for the last 15 days.