** Changed in: lightdm/1.8
Milestone: None => 1.8.6
** Changed in: lightdm/1.8
Status: Fix Committed => Fix Released
** Description changed:
- Steps to reproduce:
+ [Impact]
+ Unable to switch sessions.
+ [Test Case]
1. Log in to the desktop.
2. Log out again. (But don't reboot or anything like that.)
3. Log in again.
4. Start a guest session.
Result: Depends on Xorg server in use. With intel driver, the guest Xorg
session fails to start up with a DRM permission error (see attached
Xorg.1.log). With virtualbox, and possibly AMD proprietary driver, the
Xorg session on :1 appears to fight the one on :0 for control of the
framebuffer - windows from both desktops get drawn over each other,
causing a big mess.
The login/logout step is important: if you log in to the desktop
immediately after the lightdm session has been started or restarted
("sudo service lightdm restart"), then the :1 session will start
correctly.
(This problem can also be reproduced in another way: some desktops, when
locking the display, create a new greeter instance on :1. This will also
fail if the user has logged out and logged in again. For example,
Xubuntu does this.)
- ProblemType: Bug
- DistroRelease: Ubuntu 14.04
- Package: lightdm 1.9.3-0ubuntu1
- ProcVersionSignature: Ubuntu 3.12.0-4.12-generic 3.12.1
- Uname: Linux 3.12.0-4-generic x86_64
- ApportVersion: 2.12.7-0ubuntu1
- Architecture: amd64
- CurrentDesktop: Unity
- Date: Fri Nov 29 01:41:28 2013
- InstallationDate: Installed on 2013-11-29 (0 days ago)
- InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20131128)
- SourcePackage: lightdm
- UpgradeStatus: No upgrade log present (probably fresh install)
+ [Regression Potential]
+ Low. Bug is a simple fix for wrong logic and has been running in Ubuntu 14.04
for some time without issue.
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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to lightdm in Ubuntu.
https://bugs.launchpad.net/bugs/1256150
Title:
Xorg guest session fails to start if the user has logged out and
logged in again
Status in Light Display Manager:
Fix Released
Status in Light Display Manager 1.8 series:
Fix Released
Status in “lightdm” package in Ubuntu:
Fix Released
Status in “lightdm” source package in Saucy:
In Progress
Status in “lightdm” source package in Trusty:
Fix Released
Bug description:
[Impact]
Unable to switch sessions.
[Test Case]
1. Log in to the desktop.
2. Log out again. (But don't reboot or anything like that.)
3. Log in again.
4. Start a guest session.
Result: Depends on Xorg server in use. With intel driver, the guest
Xorg session fails to start up with a DRM permission error (see
attached Xorg.1.log). With virtualbox, and possibly AMD proprietary
driver, the Xorg session on :1 appears to fight the one on :0 for
control of the framebuffer - windows from both desktops get drawn over
each other, causing a big mess.
The login/logout step is important: if you log in to the desktop
immediately after the lightdm session has been started or restarted
("sudo service lightdm restart"), then the :1 session will start
correctly.
(This problem can also be reproduced in another way: some desktops,
when locking the display, create a new greeter instance on :1. This
will also fail if the user has logged out and logged in again. For
example, Xubuntu does this.)
[Regression Potential]
Low. Bug is a simple fix for wrong logic and has been running in Ubuntu 14.04
for some time without issue.
To manage notifications about this bug go to:
https://bugs.launchpad.net/lightdm/+bug/1256150/+subscriptions
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