*** This bug is a duplicate of bug 1803993 ***
https://bugs.launchpad.net/bugs/1803993
Thank you for taking the time to report this bug and helping to make
Ubuntu better. This particular bug has already been reported and is a
duplicate of bug 1803993, so it is being marked as such. Please look at
the other bug report to see if there is any missing information that you
can provide, or to see if there is a workaround for the bug.
Additionally, any further discussion regarding the bug should occur in
the other report. Feel free to continue to report any other bugs you may
find.
** Package changed: gdm (Ubuntu) => gdm3 (Ubuntu)
** This bug has been marked a duplicate of bug 1803993
Password appears on the VT1 screen
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https://bugs.launchpad.net/bugs/1814388
Title:
After switching users, I can see the passwords in /dev/tty1
Status in gdm3 package in Ubuntu:
New
Bug description:
Basically I installed ubuntu 18.04.1 LTS on an old machine (on a blank
SSD), and when I just when had finished the configuration installing
just a few apps, I thought I had seen the admin's user password during
Power Off (in the boot text screen that blinks) - as it's an old
computer I could see this text blinking.
I didn't even use this machine.
After some tests, I found out that after performing these steps:
- turning the machine on, logging into admin user
- logging off the admin user
- logging in a non admin user
- logging off the non admin user
- logging in back to the admin user
By running `sudo cat /dev/tty1` I could see everything which was typed
in the login screen. And that is the content that appears during the
power off text screen.
For more info, please see https://askubuntu.com/questions/1114802
The steps I can remember while setting up this machine were:
- changing region to Portuguese (brazil) and configuring keyboard
- installing Gweled, Pitivi, VLC, Spotify and SuperTuxKart through 'Ubuntu
Software'
- installing Google Chrome and Skype by downloading their deb packages from
the official websites
- uninstalled Thunderbird
- updated everything
As you can see in the AskUbuntu question, I tried to simulate this by
repeating these steps in a virtual machine, but was not able to
reproduce it. One difference is that this is a HP Pavilion old laptop
with all sorts of things on it, so many drivers may be needed which
will not be present in the VM. I booted with 4.15.0-29-generic and it
behaved the same. However, during the session booting with the
4.15.0.29 recovery mode, I could not detect that sympton!
Running:
sudo lsof /dev/tty1
prints two processes, systemd-l and gdm-wayla.
I installed again the same OS on a different machine and got all the
updates installed - no external app installed this time. And I was
able to reproduce the issue. I don't know why it doesn't happen in the
VM, but it did happen on two different machines (on blank SSDs).
```
uname -a
Linux spider 4.15.0-45-generic #48-Ubuntu SMP Tue Jan 29 16:28:13 UTC 2019
x86_64 x86_64 x86_64 GNU/Linux
```
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gnome-screensaver (not installed)
ProcVersionSignature: Ubuntu 4.15.0-45.48-generic 4.15.18
Uname: Linux 4.15.0-45-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat Feb 2 13:38:45 2019
InstallationDate: Installed on 2019-01-30 (2 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64
(20180725)
SourcePackage: gnome-screensaver
Symptom: security
Title: Screen locking issue
UpgradeStatus: No upgrade log present (probably fresh install)
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