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[Bug 1575651] Re: X stops responding to input on power saving mode


Muriel, the next step is to fully reverse commit bisect from kernel 4.4
to 4.6-rc6 in order to identify the last bad commit, followed
immediately by the first good one. Once this good commit has been
identified, it may be reviewed for backporting. Could you please do this

Please note, finding adjacent kernel versions is not fully commit

After the fix commit (not kernel version) has been identified, then
please mark this report Status Confirmed.

Thank you for your understanding.

Helpful bug reporting tips:

** Tags added: kernel-fixed-upstream-4.6-rc6 latest-bios-1.50 needs-

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

** Attachment removed: "lspci.txt"

** Attachment removed: "JournalErrors.txt"

** Attachment removed: "ProcEnviron.txt"

** Attachment removed: "Dependencies.txt"

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  X stops responding to input on power saving mode

Status in linux package in Ubuntu:

Bug description:
  Once my session has been locked and the screen off, Xserver stops responding to input ( I can still move the cursor). I can re-activate it by typing in a tty "xset dpms force on".
  If I just lock the screen all works fine.
  If I just turn off the monitor (xset dpms force off) all works fine.

  The same system (kubuntu 16.04 64bit) on different hardware (nvidia)
  has no problem.

  After waking the screen from power saving/screensaver, the primary display wakes but X stops responding to input (the mouse cursor can still move, but clicking has no effect).
  No errors in dmesg

  Occurs almost every time the screen enters power saving + locked (possibly DPMS issue?)

  The issue does NOT occur when running this kernel:
  - linux-image-4.6.0-996-generic (4.6.0-996.201604262201)
  - linux-image-4.6.0-040600rc6-generic_4.6.0-040600rc6

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: xserver-xorg-video-radeon 1:7.7.0-1
  ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
  Uname: Linux 4.4.0-21-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  CurrentDesktop: KDE
  Date: Wed Apr 27 14:00:52 2016
  InstallationDate: Installed on 2016-04-27 (0 days ago)
  InstallationMedia: Kubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  SourcePackage: xserver-xorg-video-ati
  UpgradeStatus: No upgrade log present (probably fresh install)
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
   /dev/snd/controlC1:  mu         2199 F.... pulseaudio
   /dev/snd/controlC0:  mu         2199 F.... pulseaudio
  CurrentDesktop: KDE
  DistroRelease: Ubuntu 16.04
  HibernationDevice: RESUME=UUID=28fb5b79-ea0d-4356-a118-aacacfa8e0af
  InstallationDate: Installed on 2016-04-27 (3 days ago)
  InstallationMedia: Kubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
   enp2s0    no wireless extensions.

   lo        no wireless extensions.
  MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
  Package: linux-image-4.4.0-21-generic 4.4.0-21.37 [modified: boot/vmlinuz-4.4.0-21-generic]
  PackageArchitecture: amd64
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-21-generic.efi.signed root=UUID=393ef973-c324-4b1b-9bef-d6f55bcdd242 ro noprompt persistent quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
   linux-restricted-modules-4.4.0-21-generic N/A
   linux-backports-modules-4.4.0-21-generic  N/A
   linux-firmware                            1.157

  Tags:  xenial
  Uname: Linux 4.4.0-21-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 04/29/2015
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: P1.50
  dmi.board.name: AM1H-ITX
  dmi.board.vendor: ASRock
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP1.50:bd04/29/2015:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnAM1H-ITX:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: To Be Filled By O.E.M.
  dmi.product.version: To Be Filled By O.E.M.
  dmi.sys.vendor: To Be Filled By O.E.M.

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