[Kubuntu 18.10] Latest KWin 5.14.2 kept crashing and restarting on my hardware

[Jonas Gamao]

I upgraded KWin to the latest version yesterday (from Kubuntu backports), and now it crashes frequently.  I have 1-2 VirtualBox VMs, a YouTube video, LibreOffice, Clementine, and a couple of Firefox windows open up, and KWin wouldn't stop restarting.

I tried running `ubuntu-bug kwin` and `ubuntu-bug kwin-x11`, but Apport says (both times) it's not an official Ubuntu package.

Basic specs of my hardware:

  *   Core i5-6500
  *   GTX 1060 6GB
  *   16GB RAM

My hardware info according to Ubuntu Report tool:
{
  "Version": "18.10",
  "OEM": {
    "Vendor": "MSI",
    "Product": "MS-7978"
  },
  "BIOS": {
    "Vendor": "American Megatrends Inc.",
    "Version": "C.C0"
  },
  "CPU": {
    "OpMode": "32-bit, 64-bit",
    "CPUs": "4",
    "Threads": "1",
    "Cores": "4",
    "Sockets": "1",
    "Vendor": "GenuineIntel",
    "Family": "6",
    "Model": "94",
    "Stepping": "3",
    "Name": "Intel(R) Core(TM) i5-6500 CPU @ 3.20GHz",
    "Virtualization": "VT-x"
  },
  "Arch": "amd64",
  "GPU": [
    {
      "Vendor": "10de",
      "Model": "1c03"
    }
  ],
  "RAM": 16.4,
  "Disks": [
    500.1,
    4000.8,
    256.1,
    2000.4,
    480.1,
    0,
    0,
    0,
    5001
  ],
  "Partitions": [
    240.1,
    0.2,
    3844.6,
    4883.6
  ],
  "Screens": [
    {
      "Size": "531mmx299mm",
      "Resolution": "1920x1080",
      "Frequency": "60.00"
    },
    {
      "Size": "598mmx336mm",
      "Resolution": "1920x1080",
      "Frequency": "74.97"
    }
  ],
  "Autologin": false,
  "LivePatch": false,
  "Session": {
    "DE": "KDE",
    "Name": "KDE",
    "Type": "x11"
  },
  "Language": "en_CA",
  "Timezone": "America/Toronto",
  "Install": {
    "Media": "Kubuntu 18.04.1 LTS \"Bionic Beaver\" - Release amd64 (20180725)",
    "Type": "KDE",
    "OEM": false,
    "PartitionMethod": "manual",
    "DownloadUpdates": true,
    "Language": "en",
    "Minimal": true,
    "RestrictedAddons": true,
    "Stages": {
      "0": "language",
      "2": "language",
      "39": "page",
      "46": "Form",
      "277": "Form",
      "789": "Form",
      "794": "Form",
      "847": "Form",
      "848": "Form",
      "952": "Form",
      "954": "Form",
      "984": "Form",
      "986": "Form",
      "1010": "start_install",
      "1013": "page",
      "1015": "Form",
      "1048": "user_done",
      "1808": "done"
    }
  },
  "Upgrade": {
    "From": "18.04",
    "InstallMedia": "Kubuntu 18.04.1 LTS \"Bionic Beaver\" - Release amd64 (20180725)",
    "Type": "Text",
    "ThirdPartySources": true,
    "Stages": {
      "0": "start",
      "4": "PREPARE",
      "11": "MODIFY_SOURCES",
      "275": "FETCH",
      "1401": "INSTALL",
      "1404": "INSTALL",
      "1447": "INSTALL",
      "2984": "POSTUPGRADE",
      "2985": "CLEANUP",
      "3301": "REBOOT"
    }
  }
}

Thanks, and let me know if you need anything else,
Jonas
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