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Message #69254
[Bug 1421009] Re: unity8 sometimes hangs on boot
As the bug description seems to focus on test hangs, and mentions
krillin and mako, I want to add that I see this on normal boots of mako
( vivid-proposed / #166 ) and arale ( vivid-proposed / #165 ); roughly
30% of the time.
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https://bugs.launchpad.net/bugs/1421009
Title:
unity8 sometimes hangs on boot
Status in autopilot package in Ubuntu:
Confirmed
Status in libusermetrics package in Ubuntu:
Invalid
Status in qtbase-opensource-src package in Ubuntu:
In Progress
Status in unity8 package in Ubuntu:
Invalid
Bug description:
The following gdbus call is failing with a "Error: Timeout was
reached" message:
gdbus call --session --dest com.canonical.UnityGreeter --object-path /
--method org.freedesktop.DBus.Properties.Get
com.canonical.UnityGreeter IsActive
This is being seen on krillin devices starting with image 106 from
ubuntu-touch/devel-proposed. It doesn't happen every time, so far
today, I've seen it 3 times from about 12 tests. On the most recent
failure, I grabbed a console and tried repeatedly to run the command
from the shell, even after 2 hours the timeout was still being
returned (after about 28 seconds).
A copy of ~/.cache/upstart/unity8.log is here:
http://paste.ubuntu.com/10179482/
I have 3 test cases where the problem was observed:
http://d-jenkins.ubuntu-ci:8080/job/vivid-boottest-qtchooser/1/console
http://d-jenkins.ubuntu-ci:8080/job/vivid-boottest-gsettings-ubuntu-touch-schemas/1/console
http://d-jenkins.ubuntu-ci:8080/job/fjg-boottest/3/console
In all cases, the test is using adt-run (from autopkgtest) to drive a
test on the phone device. adt-run uses the above gdbus call to
determine if the desktop is active. In all the examples, the device
was freshly flashed.
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Timeline/Updates:
2015-02-20: libusermetrics lands, causing (apparently) this boot problem to start happening rarely. http://people.canonical.com/~ogra/touch-image-stats/106.changes / http://launchpadlibrarian.net/198152771/libusermetrics_1.1.1%2B14.10.20141020-0ubuntu1_1.1.1%2B15.04.20150219-0ubuntu1.diff.gz ”I got a symbolic trace out of all the threads. It seems to be a dbus lock between usermetrics and networkmanager bits. We suspect a relation to QTBUG https://bugreports.qt.io/browse/QTBUG-44836.”;
2015-03-25: qtbase dbus update to support threads (instead of one main thread) in PPA 018 fixes the boot issue, but autopilot test suites start failing randomly.
2015-03-27: an autopilot fix fixes a simple test case, and seems to fix UITK suite as a whole, but on krillin only
Currently mako still fails a lot of tests when the silo is enabled.
The nature of failures is random (different tests fail on each run).
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References