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[Bug 1450834] [NEW] lightdm fails to unlock with serial console configured

 

Public bug reported:

With /etc/default/grub configured for serial console output as follows
(seehttps://help.ubuntu.com/community/SerialConsoleHowto):

GRUB_DEFAULT=0
GRUB_TIMEOUT=3
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT=""
GRUB_CMDLINE_LINUX=""
GRUB_CMDLINE_LINUX="console=tty0 console=ttyS0,9600n8"

#GRUB_TERMINAL=console
GRUB_TERMINAL="serial console"
GRUB_SERIAL_COMMAND="serial --speed=9600 --unit=0 --word=8 --parity=no --stop=1"

Lightdm fails to unlock a locked screen.  Initial login works fine.
But, when the screen locks, the correct password is accepted, but the
screen does not unlock.

If I disable serial console with the default "GRUB_TERMINAL=console",
lightdm screen unlock seems to work fine.  I don't know if this is a
problem with lightdm or light-locker.

** Affects: evince (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: console light-locker lightdm lock screen serial

** Attachment added: "/var/log/lightdm/*"
   https://bugs.launchpad.net/bugs/1450834/+attachment/4389139/+files/lightdm_logs.tar.gz

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https://bugs.launchpad.net/bugs/1450834

Title:
  lightdm fails to unlock with serial console configured

Status in evince package in Ubuntu:
  New

Bug description:
  With /etc/default/grub configured for serial console output as follows
  (seehttps://help.ubuntu.com/community/SerialConsoleHowto):

  GRUB_DEFAULT=0
  GRUB_TIMEOUT=3
  GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
  GRUB_CMDLINE_LINUX_DEFAULT=""
  GRUB_CMDLINE_LINUX=""
  GRUB_CMDLINE_LINUX="console=tty0 console=ttyS0,9600n8"

  #GRUB_TERMINAL=console
  GRUB_TERMINAL="serial console"
  GRUB_SERIAL_COMMAND="serial --speed=9600 --unit=0 --word=8 --parity=no --stop=1"

  Lightdm fails to unlock a locked screen.  Initial login works fine.
  But, when the screen locks, the correct password is accepted, but the
  screen does not unlock.

  If I disable serial console with the default "GRUB_TERMINAL=console",
  lightdm screen unlock seems to work fine.  I don't know if this is a
  problem with lightdm or light-locker.

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Follow ups

References