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[Bug 1409133] Re: Heavy black flickering after VT switching on Intel Ironlake Mobile.

 

William Hua, the next step is to fully commit bisect from kernel 3.16.7
to 3.18 in order to identify the last good kernel commit, followed
immediately by the first bad one. This will allow for a more expedited
analysis of the root cause of your issue. Could you please do this
following https://wiki.ubuntu.com/Kernel/KernelBisection ?

Thank you for your understanding.

** Tags removed: kernel-bug-exists-upstream-3.19-rc4 needs-upstream-testing
** Tags added: kernel-bug-exists-upstream-3.19-rc6

** Tags added: needs-bisect regression-release

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https://bugs.launchpad.net/bugs/1409133

Title:
  Heavy black flickering after VT switching on Intel Ironlake Mobile.

Status in Mir:
  New
Status in linux package in Ubuntu:
  Incomplete
Status in mir package in Ubuntu:
  New

Bug description:
  After running mir_demo_server on VT 1, when I switch to VT 7 then back to VT 1, the demo server really flickers black quite a lot (entire screen, pointer included). I'm not sure, but I also upgraded my kernel to 3.18.2-031802-generic at the same time, if it's because of that, please mark invalid.
  --- 
  ApportVersion: 2.15.1-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  william    5932 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 15.04
  HibernationDevice: RESUME=UUID=f950febe-baf1-425c-8ab5-f4f43a86839b
  Lsusb:
   Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
   Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 001 Device 003: ID 0a5c:217f Broadcom Corp. BCM2045B (BDC-2.1)
   Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: LENOVO 3249CTO
  Package: mir
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.18.0-9-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash thinkpad_acpi.fan_control=Y vt.handoff=7
  ProcVersionSignature: Ubuntu 3.18.0-9.10-generic 3.18.2
  RelatedPackageVersions:
   linux-restricted-modules-3.18.0-9-generic N/A
   linux-backports-modules-3.18.0-9-generic  N/A
   linux-firmware                            1.140
  SystemImageInfo:
   current build number: 0
   device name: 
   channel: daily
   last update: Unknown
  Tags:  vivid
  Uname: Linux 3.18.0-9-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm autopilot cdrom dip disk fuse kvm libvirtd lpadmin plugdev sambashare sbuild sudo video
  _MarkForUpload: True
  dmi.bios.date: 01/26/2010
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 6QET35WW (1.05 )
  dmi.board.name: 3249CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr6QET35WW(1.05):bd01/26/2010:svnLENOVO:pn3249CTO:pvrThinkPadX201:rvnLENOVO:rn3249CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 3249CTO
  dmi.product.version: ThinkPad X201
  dmi.sys.vendor: LENOVO

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