Background image fails to load on lightdm-gtk-greeter

[Richard Fleming]

After my system boots, the lightdm-gtk-greeter fails to load the wallpaper, instead leaving a 'white' screen. ALL other aspects load (icons, indicators, clock, login box) show, but the background does not.

After logging in, the lightdm-gtk-greeter wallpaper then is displayed and then replaced with my own personal wallpaper.

When I log out of my system, lightdm-gtk-greeter shows the default wallpaper and everything is as it should be until I reboot and once again find the 'white' background.

Additionally, I am using a Lenovo ThinkPad W510 (4319-2PU) with a built-in Nvidia Quadro FX 880M, but using the stock nouveau driver provided.

I've also installed (and since removed) the daily build of lightdm-gtk-greeter in the hopes that the newer build would have corrected this behaviour. It did not, and I downgraded back to 2.0.0-0ubuntu1.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: lightdm-gtk-greeter 2.0.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.19.0-18.18-generic 3.19.6
Uname: Linux 3.19.0-18-generic x86_64
ApportVersion: 2.17.2-0ubuntu1.1
Architecture: amd64
CurrentDesktop: XFCE
Date: Tue May 26 22:32:55 2015
InstallationDate: Installed on 2015-05-04 (22 days ago)
InstallationMedia: Xubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422.1)
SourcePackage: lightdm-gtk-greeter
UpgradeStatus: No upgrade log present (probably fresh install)

[Andrew P. (kalgasnik)]

Questions:
1. Content of "/etc/lightdm/lightdm-gtk-greeter.conf"
2. Switch to another VT and then switch back. What you see?
3. Add these options to lightdm-gtk-greeter.conf and describe the results:
user-background=false
background=#ff0000

[Richard Fleming (rfleming)]

Copy of my lightdm-gtk-greeter. It should be 'stock' as I have not done anything.

[Richard Fleming (rfleming)]

On further recollection (when changing my lightdm-gtk-greeter.conf file), I remembered I set the active-monitor param as a long-shot based on bug 1426664, which did nothing.

Reporting back on #2 and #3 of Andrew's queries.

#2. When I switch VT's and then back, the background shows
#3. When disabling the image and setting a colour, it works as expected on initial boot. As a side note, I have never seen a RED so eyeball burning on such a large surface area.

One other thing has just clicked in my head. I half-expected an xubuntu splash screen to show on system boot (like on shutdown), but I don't see that. Instead I have a black screen on load, a 'flicker' which shows multi-coloured lines, and then the greeter sans-background (now with more RED).

Rich

[Andrew P. (kalgasnik)]

It's maybe related to nouveau. Could you check the proprietary driver?

[Richard Fleming (rfleming)]

Installing the proprietary driver (NVIDIA binary driver version 340.76) indeed eliminates the 'white' background image on lightdm-gtk-greeter. Switching back to Nouveau also turns the background 'white'.

[Launchpad Janitor (janitor)]

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

[Riccardo Masala (raggioscuro)]

Hello!

I think that I hit this bug too.
Details:
When login screen appears it has a white background, instead of the specific one i set. I tried every suggestion found on the net with no success. Until (You have to try everything) I selected the "high contrast" checkbox in the accessibility menu: magically the background shows! Obviously unchecking the box turns the background white again.

My idea is that the checkbox value is inverted: the default (unchecked) setting shows high contrast instead of normal behaviour.
I hope to have explained this clearly... And to have suggested a path to solution.

My pc: core2quad, Ati X1600, Debian Stretch

[Riccardo Masala (raggioscuro)]

Rebooting (or even killing lightdm) resets the checkbox, so everytime the pc boots I have a white login background.

[Sean Davis (bluesabre)]

Is this still an issue with a supported Xubuntu release?

[Launchpad Janitor (janitor)]

[Expired for lightdm-gtk-greeter (Ubuntu) because there has been no activity for 60 days.]