Public bug reported:
Expected: Login via lightdm should successfully create a logged in Ubuntu
session.
What happened: A session is not created and I am returned to lightdm.
When I reboot my laptop, the lightdm greeter allows me to enter my
password, but when I press enter, the screen goes black, and I am
shortly returned to the lightdm screen again.
I changed to a new VT, logged in, and had a look at the lightdm log and
the syslog. The syslog showed issues with pulseaudio writing to /tmp,
and the lightdm log (possibly the xorg log) showed issues writing to
/tmp as well. Looking at /tmp, I could see it was owned by root:root,
and the permissions were 755.
I tried running a `chmod 777 /tmp`, then switched back to lightdm and
attempted a login. This time I was successfully logged in, with no
further issues. If this bug was a one off, I would just ignore it and
continue on, but this permissions problem (/tmp at 755) occurs at every
boot now. I'm not sure what triggered this behaviour, but it only
started occurring on Saturday 12th May 2012.
Ubuntu release: 11.10
lightdm version: 1.0.6-0ubuntu1.6
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: lightdm 1.0.6-0ubuntu1.6
ProcVersionSignature: Ubuntu 3.0.0-19.33-generic 3.0.27
Uname: Linux 3.0.0-19-generic x86_64
NonfreeKernelModules: wl fglrx
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
Date: Tue May 15 09:11:07 2012
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
SourcePackage: lightdm
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: lightdm (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug oneiric running-unity
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https://bugs.launchpad.net/bugs/999526
Title:
Cannot login from lightdm, /tmp is not writable
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