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[Hans109h <hans109h@xxxxxxx>]

c420dbd13ef7f399a865498496ac9ce2755b8007 is the first bad commit
commit c420dbd13ef7f399a865498496ac9ce2755b8007
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Date:   Mon Feb 2 10:42:48 2015 +0800

    ACPI: Implement proper length checks for mem resources
    
    Check whether the resulting length is the same as the given
    length. Check for start <= end as well.
    
    We need to hand in the resource for this, so we can apply the flags
    directly.
    
    [Jiang] Remove enforcement that resource starting address must be
    non-zero.
    
    Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
    Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
    Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>

:040000 040000 8cb7699fc3d3b9498cd76d13a2f5edd1b40e6c40
6602fafdd7d25b91781ce211a01e6c73a22585c4 M      drivers

** Changed in: linux (Ubuntu)
       Status: Incomplete => Confirmed

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https://bugs.launchpad.net/bugs/1509751

Title:
  Kernel disabling serial port ttyS0 again

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Upon upgrading from 14.10 to Ubuntu Gnome 15.10 with kernel 4.2 I am
  once again unable to access my serial port.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: linux-image-4.2.0-16-generic 4.2.0-16.19
  ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
  Uname: Linux 4.2.0-16-generic x86_64
  ApportVersion: 2.19.1-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/pcmC1D0c', '/dev/snd/controlC1', '/dev/snd/by-path', '/dev/snd/hwC0D3', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D7p', '/dev/snd/pcmC0D3p', '/dev/snd/pcmC0D2c', '/dev/snd/pcmC0D1p', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  Date: Sat Oct 24 22:50:11 2015
  HibernationDevice: RESUME=UUID=61ccfbf9-f4d0-4989-8d82-be0dd1500450
  InstallationDate: Installed on 2014-11-30 (328 days ago)
  InstallationMedia: Ubuntu-GNOME 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  MachineType: System manufacturer System Product Name
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-16-generic root=UUID=e0e80586-764e-42bf-8659-c5da430f1d1e ro crashkernel=384M-:128M crashkernel=384M-:128M crashkernel=384M-:128M crashkernel=384M-:128M crashkernel=384M-:128M crashkernel=384M-:128M
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-16-generic N/A
   linux-backports-modules-4.2.0-16-generic  N/A
   linux-firmware                            1.149
  RfKill:
   0: phy0: Wireless LAN
    Soft blocked: yes
    Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: Upgraded to wily on 2015-10-24 (0 days ago)
  dmi.bios.date: 08/13/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 2104
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: P8Z77-V
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev 1.xx
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2104:bd08/13/2013:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnP8Z77-V:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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