This bug was fixed in the package lightdm - 1.18.1-0ubuntu1
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lightdm (1.18.1-0ubuntu1) xenial; urgency=medium
* New upstream release:
- Use /dev/tty0 instead of /dev/console for VT operations (LP: #1566073)
-- Robert Ancell <[email protected]> Tue, 05 Apr 2016
12:06:39 +1200
** Changed in: lightdm (Ubuntu)
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/1566073
Title:
Use /dev/tty0 instead of /dev/console for VT operations
Status in Light Display Manager:
Fix Committed
Status in Light Display Manager 1.18 series:
Fix Released
Status in lightdm package in Ubuntu:
Fix Released
Status in lightdm source package in Trusty:
New
Bug description:
LightDM currently uses /dev/console for VT operations. In Ubuntu 16.04
this does not appear to work anymore. Switching to /dev/tty0 works,
and this matches what logind and GDM use.
When these operations don't work this can affect the ability to switch
between sessions.
There doesn't seem to be any documentation on what the correct device
to use for VT operations is, so matching other software is probably
just reducing the risk of hitting bugs.
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