LightDM graphic corruption with ati and nvidia

[Jiri Grönroos]

LightDM shows graphic corruption after entering password and pressing Enter. No matter if I choose Gnome Shell or Unity as a session, the corruption is still there. No other graphic corruption is visible on desktop(s).

GPU: ATI Radeon 9600 AS (AGP)
GPU driver: xserver-xorg-video-ati Version: 1:6.14.99~git20111219.aacbd629-0ubuntu2
Display: L1715S

Will attach photos later today.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: lightdm 1.1.2-0ubuntu3
ProcVersionSignature: Ubuntu 3.2.0-16.25-generic-pae 3.2.6
Uname: Linux 3.2.0-16-generic-pae i686
ApportVersion: 1.91-0ubuntu1
Architecture: i386
Date: Thu Feb 16 10:34:04 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha i386 (20120201.1)
SourcePackage: lightdm
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

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

[Chris Halse Rogers (raof)]

Does this also occur when logging into Ubuntu 2D, or a GNOME Classic (no effects) session?

[Jiri Grönroos (jiri-gronroos)]

I'm unable to test this on ATI for now. Could someone else test? This bug might be a duplicate of bug 932324.

[Ubuntu QA Website (ubuntuqa)]

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

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/934003

[Jiri Grönroos (jiri-gronroos)]

Yes, this is reproducible even with Unity 2D and Gnome Classic.

[Launchpad Janitor (janitor)]

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

[Fabio Marconi (fabiomarconi)]

Same behavior with nvidia card
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[Bryce Harrington (bryce)]

I've reproduced this on a dual head -ati box (two identical external monitors), but not on -intel (tested single headed, and dual headed with LVDS and projector, two different laptops).

[Sam_ (and-sam)]

Made the title bit more generic to reflect dupes also.

[Bryce Harrington (bryce)]

Let's focus this bug on the problem as it pertains to radeon cards. For people with nvidia hardware seeing corruption on login, please use bug #931967.

These two bugs *might* be one and the same, but until we're certain let's treat them as two driver-specific bugs that just happen to have the same symptoms. The reason is because the bug seems not to affect -intel, -nouveau, or -fglrx.

Sarvatt reminds me that -ati has had login corruption in the past. It went away in 11.04/11.10 but he thinks it was just hidden due to the boot speed getting slower in those releases so it would hide the corruption.

[Launchpad Janitor (janitor)]

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

[Sam_ (and-sam)]

Attach term.log extract from the day the corruption occured, there have been updates of xserver, unity-greeter and lightdm.

[Sam_ (and-sam)]

Due to bug 919398 wondering if they're related. The graphics corruption was always colourful or rather it displayed the broken user background image.
Recently it's black instead, same as the window underneath, it doesn't display a broken user background image.

[Sam_ (and-sam)]

Well, since I've mentioned it isn't colourful anymore - rebooted after latest updates and it's colourful again.
But the black hidden background is visible above the truncated user background.

[Chris Hermansen (c-hermansen)]

I notice what appears to be the same thing in Precise. In case it helps, my specifics:

- everything is visually fine from boot to presentation of login screen
- after I type my password, before the gray intermediate screen comes up (between login and session) in Unity 2d, my screen flickers briefly and then for about 5 seconds shows multiple corrupted password dialogue boxes scattered around the top of the screen
- my hardware is old ATI IGP stuff
- one other thing that I notice that is different than 11.10, and that is my session background also appears as my login background; that is, I chose the "watch gears" background for my session, and afterwards, whenever I see a login screen, it also has "watch gears"

[James M. Leddy (jm-leddy)]

> - one other thing that I notice that is different than 11.10, and that is my session background also appears as my login
> background; that is, I chose the "watch gears" background for my session, and afterwards, whenever I see a login screen, it also
> has "watch gears"

I believe this is a feature of 12.04

[Zach (zachary125)]

I reported what was marked as a duplicate of bug 931967, but I think it may apply here too, since I'm using AMD Radeon 6310 graphics. I'm using 12.04 Beta 1, and using the fglrx driver. You can see the full details from apport and a photo under bug 947200.