** Project changed: snappy => snapd
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https://bugs.launchpad.net/bugs/1593407
Title:
Guest session cannot run snaps
Status in Light Display Manager:
Hi Alberto, the audit log output when starting firefox is the following:
Sep 23 06:49:13 ub22mate audit[5486]: AVC apparmor="DENIED"
operation="mkdir" profile="/snap/snapd/16778/usr/lib/snapd/snap-confine"
name="/tmp/guest-tikhhx/" pid=5486 comm="snap-confine"
requested_mask="c" denied_mask="c"
Hi AG-Ubrio, the profile that you should check is not the lightdm one,
but this:
/var/lib/snapd/apparmor/profiles/snap.firefox.firefox
It doesn't matter much, though, since this also has the rule
/tmp/** mrwlkix,
Can you please check in the logs, if you get some apparmor denials when
I don't know if somebody changed something since 2022-05-03 (Comment #6
form @nrbrtx ), but my error message when starting firefox (snap) on
Ubuntu Mate 22.04 in a guest session is different:
guest-qd9nle@ubrio22:~$ firefox
cannot create user data directory: /tmp/guest-qd9nle/snap/firefox/1860:
That was firefox packaged as a deb, right?
This issue is specifically with snaps.
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Title:
Guest session cannot run
** Also affects: xubuntudesktop
Importance: Undecided
Status: New
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Title:
Guest session cannot run snaps
I verified that Firefox in the guest account on the 6 years old Xubuntu 16.04
Xenial works.
So bug #1981881 is NOT a duplicate of this bug, because it affects Xununtu
22.04 Jammy.
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>From duplicate bug #1981881: guest session can be enabled in Xubuntu 22.04 by
>creating the following file: /etc/lightdm/lightdm.conf.d/40-enable-guest.conf
with the following content:
[Seat:*]
allow-guest=true
And rebooting. At the login screen, one can select a guest session, and
** Changed in: ubuntu-mate
Status: New => Confirmed
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Title:
Guest session cannot run snaps
Status in Light
6 Year old Bug, really?
I am frustrated with Ubuntu.
Don't change firefox to a snap package when you have problems like this
canonical -__-
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: snapd (Ubuntu Xenial)
Status: New => Confirmed
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: lightdm (Ubuntu Xenial)
Status: New => Confirmed
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: firefox (Ubuntu Xenial)
Status: New => Confirmed
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: firefox (Ubuntu)
Status: New => Confirmed
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This is fantastically cool decision to ship pre-installed Firefox web-browser
as Snap.
It can't be started on freshly installed Ubuntu MATE 22.04 LTS. Very smart and
efficient idea. Very useful for internet kiosks.
```
guest-t2chxy@m:~/Desktop$ firefox
2022/05/03 10:18:59.480499
** Also affects: lightdm (Ubuntu Xenial)
Importance: Undecided
Status: New
** Also affects: snapd (Ubuntu Xenial)
Importance: Undecided
Status: New
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I just tested this on an up to date system and while the error is
different, the bug still applies, because you can't run snaps as guest.
2016/11/24 00:15:12.522919 main.go:239: WARNING: cannot create syslog logger
internal error, please report: running "mame" failed: cannot list snaps: cannot
** Also affects: snappy
Importance: Undecided
Status: New
** Also affects: lightdm
Importance: Undecided
Status: New
** Changed in: snappy
Status: New => Confirmed
** Changed in: lightdm
Status: New => Confirmed
** Changed in: snapd (Ubuntu)
Importance:
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: snapd (Ubuntu)
Status: New => Confirmed
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I had a go at this by adding the following to the lightdm apparmor
config:
/snap/ r,
/snap/** rmixk,
But it wasn't able to mount the snaps. So there must be more config
required.
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** Changed in: lightdm (Ubuntu)
Status: New => Triaged
** Changed in: lightdm (Ubuntu)
Importance: Undecided => Medium
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Yes, I know. I was referring to LightDM's guest session AppArmor profile.
I'll edit the description.
I only linked the bug to snapd to make it known to Snappy developers, and
because the bug affects it.
The actual fix probably has to be made in that LightDM profile. So, sooner or
later, the
Guest session is already confined with an apparmor profile. I think that
there's no support for profile transitions there to run snap-confine and
everything else but it might be doable
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