No Full-Disk Encryption unlock screen on some boots

[Aaron Whitehouse]

I use Full-Disk Encryption on 12.10. All seems to work fine sometimes - the pretty screen asks for my disk unlock password and then takes me to the login screen when I enter it correctly.

Other times, it shows a completely blank black screen. I can type the password "in the dark" and hit enter and it goes to the login screen, but it obviously isn't very good from a usability point of view.

Let me know how I can help.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: lightdm 1.4.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7
Uname: Linux 3.5.0-19-generic x86_64
ApportVersion: 2.6.1-0ubuntu6
Architecture: amd64
Date: Sun Dec 9 20:15:36 2012
EcryptfsInUse: Yes
InstallationDate: Installed on 2012-12-09 (0 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
MarkForUpload: True
SourcePackage: lightdm
UpgradeStatus: No upgrade log present (probably fresh install)

[Aaron Whitehouse (aaron-whitehouse)]

Okay, I just had this happen to me after shutting down, so it seems to just be random whether it works or not.

[Aaron Whitehouse (aaron-whitehouse)]

Description changed so that it no longer says this happens on reboot and not on a cold start.

[Launchpad Janitor (janitor)]

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

[Misoldgit (simonrhart)]

I have a problem with the unlock screen - it doesnt randomly not appear but it does appear as corrupted (screenshot attached). This is consistent. I've seen it appear OK once but predominantly it's corrupted. This may be a different bug in which case I'm happy to raise a new one.
Looks like a video mode problem but have tried adjusting monitor with no joy.
Monitor is a BenQ GL2250 which works fine once Ubuntu has booted.
I should point out that if I type in the password the system seems to work fine. While booting the screen stays corrupted until the login screen appears.

[Misoldgit (simonrhart)]

Here's the rescaled attached (deleted previous as not sure you needed a 2M image file :)

[Misoldgit (simonrhart)]

Found the problem - had to install nvidia-current as was using the open source drivers - unlock screen now legible.

[Aaron Whitehouse (aaron-whitehouse)]

I just did a clean install of 13.04 Raring Ringtail and this still occurs (on my first boot, unfortunately!)

[Marcelo Fernandez (fernandezm)]

My laptop is a Dell 14z - 5423 and it comes with both Intel HD400 and a ATI Radeon 7550M/7570M/7650M, so, perhaps this is where the problem comes from. I'm using 13.04 too.

Regards

[Marcelo Fernandez (fernandezm)]

This is also happening in Ubuntu 13.10.

[Marcelo Fernandez (fernandezm)]

This is fixed for me in Ubuntu 14.04!