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[Daniel van Vugt <daniel.van.vugt@xxxxxxxxxxxxx>]

** Summary changed:

- Heavy black flickering with Intel graphics after VT switching from X
+ Heavy black flickering with Intel graphics after VT switching from X to Mir

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

Title:
  Heavy black flickering with Intel graphics after VT switching from X
  to Mir

Status in The Linux Kernel:
  Confirmed
Status in Mir:
  Invalid
Status in linux package in Ubuntu:
  Triaged
Status in mir package in Ubuntu:
  Invalid

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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