ubuntu-webapps-bugs team mailing list archive

[Łukasz Zemczak <1630906@xxxxxxxxxxxxxxxxxx>]

As per the agreement, the xenial-based builders seem to be now running a
newer custom kernel (4.4.0-42-generic) that seems to no longer segfault
on QML code for arm64.

I suppose we can set the kernel task as Fix Released? Since I suppose
CONFIG_ARM64_VA_BITS=48 is the right way to go, with Qt just needing to
support it properly. This way at least we won't need to think about
SRUing it to xenial to get things unblocked. Also, our touch arm64
xenial devices are unaffected as they're still using the old kernel, so
no blockers here.

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https://bugs.launchpad.net/bugs/1630906

Title:
  QML segfault on arm64 due to builder kernel change

Status in linux package in Ubuntu:
  Confirmed
Status in online-accounts-api package in Ubuntu:
  New
Status in qmenumodel package in Ubuntu:
  New
Status in qtdeclarative-opensource-src package in Ubuntu:
  New
Status in ubuntu-push-qml package in Ubuntu:
  New
Status in unity8 package in Ubuntu:
  New
Status in webbrowser-app package in Ubuntu:
  New

Bug description:
  Builders were changed from wily to xenial (4.4) kernel for arm64, and
  likely due to this the following kind of errors started happening:

  https://launchpadlibrarian.net/288487533/buildlog_ubuntu-yakkety-arm64
  .ubuntu-push-qml_0.1+15.10.20150826.1-0ubuntu2_BUILDING.txt.gz

  They happen when executing QML code.

  I've ruled out that reverting to previous qtbase and qtdeclarative
  versions don't affect this, so it's not coming from a Qt change. I've
  also verified there's no problem eg on our Bq tablet running the same
  tests on xenial+overlay. There are currently no found changes at least
  in Qt upstream to backport arm64 related fixes.

  Cause is unknown. But the same problem is there on vivid, xenial and yakkety builds:
  https://launchpadlibrarian.net/288516465/buildlog_ubuntu-yakkety-arm64.online-accounts-api_0.1+16.10.20161006.1-0ubuntu1_BUILDING.txt.gz
  https://launchpadlibrarian.net/288515705/buildlog_ubuntu-xenial-arm64.online-accounts-api_0.1+16.04.20161006.1-0ubuntu1_BUILDING.txt.gz
  https://launchpadlibrarian.net/288515510/buildlog_ubuntu-vivid-arm64.online-accounts-api_0.1+15.04.20161006.1-0ubuntu1_BUILDING.txt.gz

  This means it does not matter if it's Qt 5.4 or 5.6, GCC 4.9, 5 or 6,
  or glibc 2.21, 2.23 or 2.24.

  More logs from affected packages:
  https://launchpadlibrarian.net/288493058/buildlog_ubuntu-yakkety-arm64.qtdeclarative-opensource-src_5.6.1-7ubuntu3~1_BUILDING.txt.gz
  https://launchpadlibrarian.net/288347391/buildlog_ubuntu-xenial-arm64.webbrowser-app_0.23+16.04.20161005.1-0ubuntu1_BUILDING.txt.gz
  https://launchpadlibrarian.net/288385063/buildlog_ubuntu-vivid-arm64.qmenumodel_0.2.10+15.04.20161005.1-0ubuntu1_BUILDING.txt.gz

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