touch-packages team mailing list archive

[Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>]

FYI:  atkbd driver never probes for keyboards on pass-through PS/2 ports
(if you check drivers/input/keyboard/atkbd.c you will see that
SERIO_PS_PSTHRU is not present in atkbd_serio_ids) so keyboard can't
possibly be connected there on these Lifebooks.

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to initramfs-tools in Ubuntu.
https://bugs.launchpad.net/bugs/1314764

Title:
  [Fujitsu Lifebook E744/E754] i8042 without psmouse means no keyboard
  at decryption prompt

Status in initramfs-tools package in Ubuntu:
  Fix Released
Status in initramfs-tools source package in Trusty:
  Fix Released

Bug description:
  [Impact]

  When installing encrypted root on these machine the user ends up
  unable to unlock their root.  This will happen on first boot after an
  install with such a root.  The user is unable to unlock their machine
  without an external keyboard; and is likley to not have access to the
  internet to find the work around.

  [Test Case]

  Install on such a machine and confirm that you cannot unlock, install
  the updated packages and confirm you can.

  [Regression Potential]

  The fix only adds the psmouse kernel module to the default initramfs
  build which is relativly benign and should be loaded in the normal
  case from the root filesystem.  The risk seems very low.

  ===

  The built-in keyboard & touchpad on these machines are fully PS/2 based. At first glance, building i8042 into the kernel proper seems sufficient:
  [    2.264540] i8042: PNP: PS/2 Controller [PNP0303:KBC,PNP0f13:PS2M] at 0x60,0x64 irq 1,12
  [    2.274233] i8042: Detected active multiplexing controller, rev 1.1
  [    2.279284] serio: i8042 KBD port at 0x60,0x64 irq 1
  [    2.280742] serio: i8042 AUX0 port at 0x60,0x64 irq 12
  [    2.282212] serio: i8042 AUX1 port at 0x60,0x64 irq 12
  [    2.283683] serio: i8042 AUX2 port at 0x60,0x64 irq 12
  [    2.285121] serio: i8042 AUX3 port at 0x60,0x64 irq 12

  However, psmouse needs to be built into the initrd to get the keyboard to start working. This is because it sits behind the touchpad on a port that will not work until initialised:
  [    4.339219] psmouse serio2: synaptics: Touchpad model: 1, fw: 8.1, id: 0x1e2b1, caps: 0xd001a3/0x940300/0x126800, board id: 2720, fw id: 1450125
  [    4.339233] psmouse serio2: synaptics: serio: Synaptics pass-through port at isa0060/serio2/input0

  This:
  CONFIG_SERIO_I8042=y

  Should really be accompanied by:
  CONFIG_MOUSE_PS2_SYNAPTICS=y

  Having the Synaptics support as a module leaves these laptops on an LVM2/DM-crypt password prompt with a non-working keyboard. Users can work around it by connecting a USB keyboard to "jump start" the machine, or add psmouse to /etc/initramfs-tools/modules .
  Without disk encryption, the root filesystem will be available in time and the Synaptics driver will initialise the keyboard well before the X login chooser appears.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/1314764/+subscriptions