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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

I created a V2 test kernel since reverting only 0ed67cf and 53dfa1d
still exhibits the bug.  The V2 test kernel has the following four
commits reverted:

86ad82b UBUNTU: SAUCE: i915_bpo: drm/i915: Split atomic wm update to pre and post variants
059c4a4 UBUNTU: SAUCE: Migrate Broadwell to i915_bpo.
53dfa1d UBUNTU: SAUCE: i915_bpo: Set ddi_pll_sel in DP MST path
0ed67cf UBUNTU: SAUCE: i915_bpo: drm/i915: Don't use link_bw for PLL setup

This test kernel can be downloaded from:

http://kernel.ubuntu.com/~jsalisbury/lp1500751

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https://bugs.launchpad.net/bugs/1500751

Title:
  Cryptsetup Keyboard not working on Xubuntu 3.19.0-30

Status in cryptsetup package in Ubuntu:
  Invalid
Status in linux package in Ubuntu:
  In Progress

Bug description:
  I am running Xubuntu 15.04 and just upgraded to the latest kernel (3.19.0-30).
  After upgrading the boot time is longer (what is negligible) but the more severe error is, that I cannot enter my passphrase when I see the crypt dialog.
  I just see the dialog to enter my passphrase, but when I try to enter it, nothing appears in the textfield. I tried with the builtin laptop keyboard but also with an external USB keyboard.

  I thought about supplying more information, but things like the syslog
  are not helping apparently (I was not able to boot until the syslog
  would capture information...). If you need anything I can provide, I
  gladly help.

  [Test case]
  1. On an affected system boot into kernel 3.19.0-30

  [Solution]
  The "solution" for now is booting the older Kernel 3.19.0-28 (which isn't a real solution).

  PS.: Bugs like the following are either not applicable or the solution is not working for me:
  https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/229732
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1359689
  https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/1238194

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