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[Albert <sapristi@xxxxxxxxx>]

Thank you for following up.

I have now installed and booted with 4.6-rc-wily, and the result is that
it freezes at the desktop password prompt.

It reaches the desktop password prompt with the cursor blinking in the
input field, but does not accept keystrokes. The wifi connects, popping
up a message. Soon after the password input field freezes. At no point
could I switch to a tty or type anything. The only functioning key is
the power button, which shows the pre-shutdown dialog to choose reboot,
shudown or sleep, but the mouse is not working either.

This is exactly the same situation as with kernel 4.4.0-21, as reported
at:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1578621

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https://bugs.launchpad.net/bugs/1575197

Title:
  Enabling "Using processor microcode firmware for Intel CPUs" in
  "Additional Drivers" breaks sleep-resume

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Disabling it (was disabled by default) enables this MacBook Pro 11,1
  laptop to suspend and resume normally.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-21-generic 4.4.0-21.37
  ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
  Uname: Linux 4.4.0-21-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  albert     1695 F.... pulseaudio
   /dev/snd/controlC1:  albert     1695 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Tue Apr 26 10:00:02 2016
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-09-16 (588 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: Apple Inc. MacBookPro11,1
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-21-generic root=UUID=1fe82ec9-9c83-4e33-9506-2f7afb8d9d64 ro libata.force=noncq quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-21-generic N/A
   linux-backports-modules-4.4.0-21-generic  N/A
   linux-firmware                            1.157
  SourcePackage: linux
  UpgradeStatus: Upgraded to xenial on 2016-04-23 (3 days ago)
  dmi.bios.date: 02/12/2014
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBP111.88Z.0138.B07.1402121134
  dmi.board.asset.tag: Base Board Asset Tag#
  dmi.board.name: Mac-189A3D4F975D5FFC
  dmi.board.vendor: Apple Inc.
  dmi.board.version: MacBookPro11,1
  dmi.chassis.type: 10
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-189A3D4F975D5FFC
  dmi.modalias: dmi:bvnAppleInc.:bvrMBP111.88Z.0138.B07.1402121134:bd02/12/2014:svnAppleInc.:pnMacBookPro11,1:pvr1.0:rvnAppleInc.:rnMac-189A3D4F975D5FFC:rvrMacBookPro11,1:cvnAppleInc.:ct10:cvrMac-189A3D4F975D5FFC:
  dmi.product.name: MacBookPro11,1
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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