Lightdm-gtk-greeter coredump during boot with recent systemd versions
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
lightdm-gtk-greeter (Ubuntu) |
Fix Released
|
High
|
Unassigned | ||
Bionic |
Fix Released
|
Undecided
|
Unassigned | ||
Groovy |
Fix Released
|
Undecided
|
Unassigned |
Bug Description
* Impact
The lightdm-gtk-greeter often segfaults on VMs
* Test case
- start a xubuntu livesession in a VM and logout
-> you should get a greeter to log in
(or install xubuntu in a VM)
* Regression potential
the mlockall call was supposed to provide improved security but isn't working, it was already commented out some cycles ago in unity-greeter, upstream and it other distributions
------------------
Upstream:https:/
This is one of the many core dumps on `journalctl` for a given boot (dumps multiple times before starting) :
**See it on upstream bug report**
System Details:
System:
Kernel: 5.8.0-12-generic x86_64 bits: 64 compiler: N/A Desktop:
Xfce 4.14.2
Distro: Ubuntu 20.10 (Groovy Gorilla) (*Proposed)
lightdm 1.30.0-0ubuntu3.1: amd64
lightdm-gtk-greeter 2.0.6-0ubuntu1:
lightdm-
linux-firmware 1.189
-------
systemd,
systemd-sysv 245.7-1ubuntu1
-------
Current Behaviour:
On boot screen blinks for 2-3 times (probably the segmentation fault) but eventually starts after 1-2 minutes.
Expected Behaviour:
Greeter would appear properly after boot.
Note: Some other systemd services are also failing on proposed, not sure if related.
ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: lightdm-gtk-greeter 2.0.6-0ubuntu1
ProcVersionSign
Uname: Linux 5.8.0-12-generic x86_64
ApportVersion: 2.20.11-0ubuntu43
Architecture: amd64
CasperMD5CheckR
CurrentDesktop: XFCE
Date: Wed Aug 5 12:58:44 2020
InstallationDate: Installed on 2020-04-17 (109 days ago)
InstallationMedia: Xubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200416)
SourcePackage: lightdm-gtk-greeter
UpgradeStatus: Upgraded to groovy on 2020-08-04 (0 days ago)
modified.
[greeter]
indicators = ~session;
default-user-image = /home/korte/
mtime.conffile.
description: | updated |
description: | updated |
Changed in lightdm-gtk-greeter (Ubuntu): | |
status: | Confirmed → Fix Committed |
description: | updated |
summary: |
- Ubuntu 20.10 Groovy Proposed: Lightdm-gtk-greeter coredump during boot + Lightdm-gtk-greeter coredump during boot with recent systemd versions |
description: | updated |
tags: |
added: verification-done-groovy removed: verification-needed-groovy |
tags: | removed: groovy |
Moving on to,
# cat /proc/version_ signature
Ubuntu 5.8.0-16.17-generic 5.8.0
The bug is still there and greeter dumps core almost 2-3 times in a given boot before stabilizing.