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[Olivier Tilloy <olivier.tilloy@xxxxxxxxxxxxx>]

** No longer affects: chromium-browser

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https://bugs.launchpad.net/bugs/1768199

Title:
  Chromium freezes

Status in chromium-browser package in Ubuntu:
  Fix Released

Bug description:
  After I updated to Ubuntu 18.04 I noticed that chromium interactions
  (scroll for example) and mouse pointer itself started to freeze for
  hundreds of milliseconds (0.1s - 0.2s).

  So, I was constantly scrolling (in order to reproduce the bug) while
  running perf top, and it pointed to this function:

  sudo perf top -t 1892 -d 5 --call-graph fp

    Children      Self  Shared Object               Symbol

  -   80,55%     0,00%  libc-2.27.so                [.] __GI___ioctl
     - 76,84% __GI___ioctl
          71,67% _nv029804rm
        - 1,12% _nv020749rm
           - 1,03% os_release_spinlock
                0,97% _raw_spin_unlock_irqrestore

  -   71,69%    71,67%  [kernel]                    [k] _nv029804rm
       71,58% 0x180000012a
          __GI___ioctl
          _nv029804rm

  -   16,75%     0,00%  [unknown]                   [k] 0x000000180000012a
       0x180000012a
     - __GI___ioctl
          15,25% _nv029804rm

  -    8,67%     0,25%  libc-2.27.so                [.] syscall
     - 5,45% syscall
          1,89% syscall_return_via_sysret
        - 1,05% entry_SYSCALL_64_after_hwframe
           - 1,22% do_syscall_64

  top command also showed that this process was eating one core.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: chromium-browser 65.0.3325.181-0ubuntu1
  ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
  Uname: Linux 4.15.0-20-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.9-0ubuntu7
  Architecture: amd64
  CurrentDesktop: KDE
  Date: Tue May  1 10:38:19 2018
  Desktop-Session:
   'plasma'
   '/etc/xdg/xdg-plasma:/etc/xdg:/usr/share/kubuntu-default-settings/kf5-settings'
   '/usr/share/plasma:/usr/local/share:/usr/share:/var/lib/snapd/desktop'
  DetectedPlugins:

  Env:
   'None'
   'None'
  InstallationDate: Installed on 2017-12-16 (136 days ago)
  InstallationMedia: Kubuntu 17.10 "Artful Aardvark" - Release amd64 (20171017.1)
  InstalledPlugins:

  Load-Avg-1min: 1.64
  Load-Processes-Running-Percent:   0.1%
  MachineType: System manufacturer System Product Name
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-20-generic root=UUID=e3723f86-9a4d-4166-960b-88262212fcc6 ro quiet splash vt.handoff=1
  SourcePackage: chromium-browser
  UpgradeStatus: Upgraded to bionic on 2018-04-02 (28 days ago)
  dmi.bios.date: 08/31/2017
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 0408
  dmi.board.asset.tag: Default string
  dmi.board.name: PRIME Z370-A
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev X.0x
  dmi.chassis.asset.tag: Default string
  dmi.chassis.type: 3
  dmi.chassis.vendor: Default string
  dmi.chassis.version: Default string
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0408:bd08/31/2017:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnPRIMEZ370-A:rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring:
  dmi.product.family: To be filled by O.E.M.
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer
  modified.conffile..etc.default.chromium-browser: [deleted]

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