Public bug reported:
Currently, the only way to disable the guest session in lightdm is to
set allow-guests=False in /etc/lightdm/lightdm.conf. However, setting
this causes the Switch to guest user option to vanish from the power cog
within a logged-in user's session.
There should be an option to allow an already logged-in user to spawn a
guest session, rather than completely disabling it.
Use case:
John has a laptop he does not want unauthorized users using. On the other hand,
when a friend asks to use his laptop, he does not want to allow his user
account to be used.
In the current situation:
If John enabled allow-guests=True, in lightdm.conf, then:
- if the laptop is on, but with the screen locked, an unauthorized user can
click "Switch User" to return to the lightdm greeter and select the Guest user.
- if the laptop is off (and does not have a dm-crypt root setup), an
unauthorized user can log into the Guest account.
However, if allow-guests is disabled, then John will not be able to
spawn a guest session for his friends to use when the need arises
without needing to restart lightdm.
** Affects: lightdm (Ubuntu)
Importance: Undecided
Status: New
** Description changed:
Currently, the only way to disable the guest session in lightdm is to
set allow-guests=False in /etc/lightdm/lightdm.conf. However, setting
this causes the Switch to guest user option to vanish from the power cog
- within the user's session.
+ within a logged-in user's session.
There should be an option to allow an already logged-in user to spawn a
guest session, rather than completely disabling it.
Use case:
John has a laptop he does not want unauthorized users using. On the other
hand, when a friend asks to use his laptop, he does not want to allow his user
account to be used.
In the current situation:
If John enabled allow-guests=True, in lightdm.conf, then:
- - if the laptop is on, but with the screen locked, an unauthorized user can
click "Switch User" to return to the lightdm greeter and select the Guest user.
- - if the laptop is off (and does not have a dm-crypt root setup), an
unauthorized user can log into the Guest account.
+ - if the laptop is on, but with the screen locked, an unauthorized user can
click "Switch User" to return to the lightdm greeter and select the Guest user.
+ - if the laptop is off (and does not have a dm-crypt root setup), an
unauthorized user can log into the Guest account.
However, if allow-guests is disabled, then John will not be able to
spawn a guest session for his friends to use when the need arises
without needing to restart lightdm.
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https://bugs.launchpad.net/bugs/942792
Title:
lightdm should allow guest session to be disabled at the login page
while retaining the ability to allow the guest session to be activated
from another user's session
Status in “lightdm” package in Ubuntu:
New
Bug description:
Currently, the only way to disable the guest session in lightdm is to
set allow-guests=False in /etc/lightdm/lightdm.conf. However, setting
this causes the Switch to guest user option to vanish from the power
cog within a logged-in user's session.
There should be an option to allow an already logged-in user to spawn
a guest session, rather than completely disabling it.
Use case:
John has a laptop he does not want unauthorized users using. On the other
hand, when a friend asks to use his laptop, he does not want to allow his user
account to be used.
In the current situation:
If John enabled allow-guests=True, in lightdm.conf, then:
- if the laptop is on, but with the screen locked, an unauthorized user can
click "Switch User" to return to the lightdm greeter and select the Guest user.
- if the laptop is off (and does not have a dm-crypt root setup), an
unauthorized user can log into the Guest account.
However, if allow-guests is disabled, then John will not be able to
spawn a guest session for his friends to use when the need arises
without needing to restart lightdm.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/942792/+subscriptions
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