after fresh install with encrypted lvm system refuses to get past grub

Bug #1525044 reported by scottrobbertson on 2015-12-11
This bug affects 2 people
Affects Status Importance Assigned to Milestone
grub (Ubuntu)

Bug Description

system loads grub and allows menu selection, but then goes to a blank screen with cursor and no password prompt

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: grub (not installed)
ProcVersionSignature: Ubuntu 4.3.0-2.11-generic 4.3.0
Uname: Linux 4.3.0-2-generic x86_64
ApportVersion: 2.19.2-0ubuntu9
Architecture: amd64
CasperVersion: 1.366
CurrentDesktop: KDE
Date: Fri Dec 11 01:32:26 2015
LiveMediaBuild: Kubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20151209)
SourcePackage: grub
UpgradeStatus: No upgrade log present (probably fresh install)

Ubuntu QA Website (ubuntuqa) wrote :

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

A list of all reports related to this bug can be found here:

tags: added: iso-testing
sudodus (nio-wiklund) wrote :

Maybe this bug is somehow related to Bug #1530548

'passphrase for encrypted disk is not shown'

Launchpad Janitor (janitor) wrote :

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

Changed in grub (Ubuntu):
status: New → Confirmed
Changed in grub (Ubuntu):
importance: Undecided → Critical
Brian Murray (brian-murray) wrote :

A good way to test if it is in fact a duplicate seems to be using the arrow keys when you see the blank screen.

Phillip Susi (psusi) wrote :

Indeed, press alt + left/right arrow to cycle through the ttys and see if you come across the password prompt.

Changed in grub (Ubuntu):
status: Confirmed → Incomplete
Launchpad Janitor (janitor) wrote :

[Expired for grub (Ubuntu) because there has been no activity for 60 days.]

Changed in grub (Ubuntu):
status: Incomplete → Expired
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