| 2018-08-13 12:03:48 |
yan |
description |
I found a bug in ubuntu At the login screen
buster/sid
Linux 4.15.0-24-generic #26-Ubuntu SMP Wed Jun 13 08:44:47 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
I use my work laptop and today when I came back to office I connected both my external monitor.
1 HDMI cable and 1 Mini display port cable.
Then I realize one screen on the right had my login screen prompting for password and the left monitor was unlock, I was able to navigate the mouse and use the computer just fine. However all the keyboard input was sent to the password prompt.
I did the test a couple time and each time I was able to reproduce the issue.
#1: Lock the computer
#2: Disconnect both external monitor
#3: Reconnect external monitor ( my sequence was HDMI -> Display port )
#4: You've bypass the login screen.
When doing the demo to my colleague I was able to completely bypass the login screen on both screen and had complete mouse and keyboard input. At that time I was not able anymore to lock my session. I had to reboot the laptop.
Laptop model:
Manufacturer: LENOVO
Product Name: 20FN002VCA
Version: ThinkPad T460 |
I found a bug in ubuntu At the login screen
buster/sid
Linux 4.15.0-24-generic #26-Ubuntu SMP Wed Jun 13 08:44:47 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
I use my work laptop and today when I came back to office I connected both my external monitor.
1 HDMI cable and 1 Mini display port cable.
Then I realize one screen on the right had my login screen prompting for password and the left monitor was unlock, I was able to navigate the mouse and use the computer just fine. However all the keyboard input was sent to the password prompt.
I did the test a couple time and each time I was able to reproduce the issue.
#1: Lock the computer
#2: Disconnect both external monitor
#3: Reconnect external monitor ( my sequence was HDMI -> Display port )
#4: You've bypass the login screen.
When doing the demo to my colleague I was able to completely bypass the login screen on both screen and had complete mouse and keyboard input. At that time I was not able anymore to lock my session. I had to reboot the laptop.
Laptop model:
Manufacturer: LENOVO
Product Name: 20FN002VCA
Version: ThinkPad T460
---
ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
DistroRelease: Ubuntu 18.04
InstallationDate: Installed on 2018-04-30 (104 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
Package: gdm3 3.28.2-0ubuntu1.3
PackageArchitecture: amd64
ProcEnviron:
LANGUAGE=en_CA
TERM=xterm-256color
PATH=(custom, no user)
LANG=en_CA.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 4.15.0-30.32-generic 4.15.18
Tags: bionic
Uname: Linux 4.15.0-30-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
_MarkForUpload: True |
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