Meanwhile in some other Ubuntu-Based Distros (especially official ones), the username goes by their distro name (e.g: Xubuntu='xubuntu', Lubuntu='lubuntu' etc) though you can also find the username of it on some distros by looking at the upper-left hand corner.
Syslinux type installers including Rufus, Startup Disk Creator, UNetbootin, Universal and YUMI do not use ubuntu as the default user, they use Live session user instead.
Grub type installers, ie mkusb also use Live session user as user and a blank password when logging back in. After a suspend simply pressing the power button brings you back to desktop.
Live CD/DVD also uses Live session user for user name, it is supplied automatically. After logging out, a password is not asked for when logging back in. After suspend, pressing the power button will bring you back to desktop.
If the username is "ubuntu" as it should be and if no password is needed to execute a sudo command, you will still be asked for a password after logging out when logging back in and a blank password usually won't work here.
I had the same issue on an HP Elitebook Folio 1040 with the standard 16.04.1 image, downloaded and copied to USB with usb-creator-gtk 0.2.23. None of the above mentioned username/password combinations worked for me.
Not blank...example in 14.10 live I installed xfce4 then logged out. Had to add a user. To do so press Ctrl+Alt+F2. You should now see a console. Type sudo adduser anyname and follow the instructions. Afterwards press Ctrl+Alt+F7. You should be at the graphic login able to use the info you created.
It seems that for some reason in Ubuntu 18.04 Desktop the install media which I just downloaded and verified via md5, and sha256 hashes along with using the gpg signatures to validate the md5, and sha256 hashes from -iso/18.04/ubuntu-18.04-desktop-amd64.iso that you can not utilize the tty[2-4] as in past installer executions. The tty2 screen is now asking for a username/password pair to access tty2 which is NOT ubuntu:{no-password}. Please not that in the past that tty[1-4] were non GUI (tty1 was for dmesg logging for errors thrown while installing, however tty[2-4] were usually available to the user to access the command line, tty7 was generally set aside as the graphical interface for the installer up through 16.x while 17.x and newer moved the graphical installer screen to tty1) and defaulted to a sh/bash or similar command shell without any username/password login. As there is a definite use for having access to the command line while installing I would recommend a check that this is indeed the desired action to have while the installer is running.
Further testing of usernames failed to allow me into the terminal. Usernames I tried were and yet all listed below failed the username/password check. root:root root:{no-password} ubuntu:{no-password} ubuntu:ubuntu Ubuntu:{no-password} Ubuntu:Ubuntu
I got around this issue by moving the mouse around until it completed its boot cycle. It looks like the screen is locking, that is why it wants the password. By continuously moving the mouse, the screen never locked.
I've tried uninstalling and reinstalling Thunderbird. I've tried removing and reinstalling the account, which it shows being installed with these specs:Incoming: IMAP imap.gmail.com SSL Outgoing: SMTP smpt.gmail.com SSLUsername: xxx.gmail.com... and then the message "Unable to login at server. Probably wrong configuration, username, or password"
The less-secure apps setting and two-step verification aren't relevant if the authentication is OAuth2, but worth a try anyway. But you can check the Account/Security page in Google to see if 'Third-party apps with account access' lists TB.
I went to security/saved passwords and clicked on "show passwords". The stored password for the account with the problem was completely incorrect and not even a password I'd ever used. I deleted both the incoming and outgoing password entries and exited TB. When I opened TB again it ask
