Public bug reported:
Hi,
I have a bug since the recent updates on Ubuntu 18.04 (post 10th March):
when the user password contains a circumflex accent, like "û", access is
denied even if password entered is correct and I stay blocked in a loop
at gdm login screen - error message (translated from French): "Sorry, it
doesn't work, please try again".
Even after modifying it on recovery mode with passwd without û, it stays
blocked. Only way to solve it is to reinstall.
Graphic card: [AMD/ATI] Cape Verde XT [Radeon HD 7770/8760 / R7 250X]
Kernel driver in use: radeon
Kernel modules: radeon, amdgpu
Steps to reproduce :
I did a fresh and new install with 18.04 daily iso from 21st March,
formatting / and /home with following user password:
Ubuntu42
At startup, I could log successfully both on Xorg and Wayland sessions. Then I
modified and tested those passwords, with all of them I could again boot and
connect, on Xorg and Wayland:
ArchLinux43
LinuxMint@28
KDENeon=51
Fedora_1984
But the last one made me blocked at the gdm login screen:
Debianû74
Here unable to modify it on recovery session, error message in French:
"erreur de manipulation du jeton d'authentification".
Also unable to launch terminal: CTRl Alt F1 refreshes the screen, but
F2, F3... F12 freezes it! I only can update in chroot with lie USB.
I had to again format and reinstall, with a password without any
circumflex accent.
How and when I discovered it :
On 10th March, I ran since many weeks the alpha version of Ubuntu 18.04,
with a password having a "û" inside, which had always worked fine. I did
an update, cumulating the last 3 weeks before.
On next startup, when I typed my password, both on Xorg and Wayland
sessions, no error message but no desktop, nothing appeared but a few
seconds later I was back on login screen.
I could well log in on terminal (Ctrl Alt F2) or chroot with a live USB,
and do the last updates in the next days, but nothing changed.
On console, if I ran "startx" I got the message "timeout in locking
authority file" and "fatal server error: cannot open log file
./local/share/xorg/Xorg.0.log
Both / and /home were not full - more than 60% space available, verified
with df -Th ; echo ; df -Ti
I tried to reinstall Ubuntu with daily live of 15th March, formatting /
but not /home as it was protected by ecryptfs and I didn't save some
files, using same user name and password, still blocked.
So I copied the /home and .Private folders to another disk to try later
recover them, reinstall again, formatting both / and /home, always with
my usual password having a "û" (I verified French language, keyboard
with French activated, upper case, symbols... OK).
This time, again both for Xorg or Wayland sessions, at gdm login I did
not success to connect, I got an error message "Désolé ça n'a pas
fonctionné, veuillez réessayer",
I tried to modify the password in recovery mode, with no special
characters nor accents, but still blocked at gdm. And no terminal
available with Ctrl Alt F2...
On 23rd March, I re-reinstalled all Ubuntu, formatting / and /home, this
time with daily iso from 21st March, but with a modification: to avoid
any misconfiguration with languages on live USB, I chose a very easy
password, only with normal letters and numbers.
On startup, yes, finally I could log at gdm on default Xorg session and
enter desktop !
I went to my user configuration, changed to put my usual password (with
an "û"), and bam, back to the future, still blocked at gdm screen on
restart, either on Xorg or Wayland, Ctr Alt F2 not working.
It made me understand that the bug came from a special character in my
password, then I tried the different ones explained on top of this
report to discover it was "û".
** Affects: gdm3 (Ubuntu)
Importance: Undecided
Status: New
** Tags: gdm password ubuntu-fr-bionic
** Attachment added: "Ubuntu.jpg"
https://bugs.launchpad.net/bugs/1758563/+attachment/5089342/+files/Ubuntu.jpg
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https://bugs.launchpad.net/bugs/1758563
Title:
Blocked at gdm login screen on 18.04 if user password has a circumflex
accent
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