Update: a workaround to recover the "gdm user chooser" is to avoid the smartcard support from launching, which can be done editing this file
/etc/xdg/autostart/org.gnome.SettingsDaemon.Smartcard.desktop
comment out the existing "Exec" line, and add a new one pointing to this harmless do-nothing binary, /usr/bin/true
The chooser now works. Still wondering how is it that 22.04 was working with no problem with my yubikey always plugged since June till November
Update: a workaround to recover the "gdm user chooser" is to avoid the smartcard support from launching, which can be done editing this file
/etc/xdg/ autostart/ org.gnome. SettingsDaemon. Smartcard. desktop
comment out the existing "Exec" line, and add a new one pointing to this harmless do-nothing binary, /usr/bin/true
The chooser now works. Still wondering how is it that 22.04 was working with no problem with my yubikey always plugged since June till November