Ubuntu
unity package

Login screen is scrambled after resuming from sleep, not displaying inputs

Bug #1509809 reported by Jan-Helge
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Unity
New
Low
Unassigned
Ubuntu
New
Low
Unassigned
unity (Ubuntu)
New
Low
Unassigned

Bug Description

After resuming from sleep, the login screen seems to be a collage of different fragments from the desktop before going to sleep.

This is a regression from 15.04 where it worked perfectly :-)

Inputing the password and hitting enter brings up the desktop as expected, so it would seem like a pure display issue.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: lightdm 1.16.4-0ubuntu1
ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
Uname: Linux 4.2.0-16-generic x86_64
ApportVersion: 2.19.1-0ubuntu3
Architecture: amd64
CurrentDesktop: Unity
Date: Sun Oct 25 14:19:20 2015
InstallationDate: Installed on 2015-04-23 (184 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Beta amd64 (20150326)
LightdmConfig:
 [SeatDefaults]
 autologin-user=
SourcePackage: lightdm
UpgradeStatus: Upgraded to wily on 2015-10-24 (0 days ago)

Revision history for this message
Jan-Helge (jhberges) wrote :
Revision history for this message
Sebastien Bacher (seb128) wrote :

Thank you for your bug report. Can you make a photo of the issue? Are you using the greeter as lock screen or are you talking about the unity lockscreen?

Changed in lightdm (Ubuntu):
importance: Undecided → Low
status: New → Incomplete
Revision history for this message
Sebastien Bacher (seb128) wrote :

oh, and what video card and driver do you use?

Revision history for this message
Jan-Helge (jhberges) wrote :

Today, it's elected to be plain blue - instead of mosaic/collage. :-)

Interestingly this happens when choosing "Suspend" from a logged in session.
If I lock the screen (to the "Switch user" screen) and select suspend, then resume is all fine.

My graphics card is:

jhb@ThinkPad-W510:~$ lspci | grep -i vga
01:00.0 VGA compatible controller: NVIDIA Corporation GT216GLM [Quadro FX 880M] (rev a2)

(standard for a Lenovo Thinkpad w510)

Revision history for this message
Jan-Helge (jhberges) wrote :

I'm not sure, but I think it's the greeter lock screen.
I suspend the laptop, then resume - and have it set up to demand password validation?

Revision history for this message
Sebastien Bacher (seb128) wrote :

it's likely unity which is handling the lock in this case

affects: lightdm (Ubuntu) → unity (Ubuntu)
Changed in unity (Ubuntu):
status: Incomplete → New
Marco Trevisan (Treviño) (3v1n0)
Changed in unity:
importance: Undecided → Low
Revision history for this message
Anantha Krishna K S (ananthakrishna-ks) wrote :

Display is scrambling frequently after installing Ubuntu 15.10 desktop on HP Compaq DX 6120 and DX 2280

affects: unity → ubuntu
Marco Trevisan (Treviño) (3v1n0)
Changed in unity:
importance: Undecided → Low
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