[Dash] unity8-dash crashed with ASSERT: "eglDestroyContext(mEglDisplay, mEglContext) == EGL_TRUE"

[Alberto Mardegan]

Testing unity8 on a Lenovo IdeaPad s10-3t. The welcome wizard completed successfully. Unity8 loads, the indicators are visible and working.
However, nothing else works: the scope shell doesn't load, only the splash screen is shown with the progress indicator spinning, and you can see that periodically it's restarted. Upstart logs for unity8-shell show an infinite loop of these:

==============
Loading module: 'libubuntu_application_api_desktop_mirclient.so.2.9.0'
[1427269742.137055] Loader: Loading modules from: /usr/lib/i386-linux-gnu/mir/client-platform/
[1427269742.137918] Loader: Loading module: /usr/lib/i386-linux-gnu/mir/client-platform/dummy.so
[1427269742.139587] Loader: Loading module: /usr/lib/i386-linux-gnu/mir/client-platform/mesa.so.2
[1427269742.140657] Loader: Loading module: /usr/lib/i386-linux-gnu/mir/client-platform/mesa.so
QSocketNotifier: Can only be used with threads started with QThread
QSocketNotifier: Can only be used with threads started with QThread
QObject::startTimer: Timers can only be used with threads started with QThread
QIBusPlatformInputContext: invalid bus.
file:///usr/share/unity8/Dash/Dash.qml:245: ReferenceError: scopeStyle is not defined
UbuntuWindow - regular geometry
file:///usr/share/unity8/Dash/Dash.qml:245: ReferenceError: scopeStyle is not defined
ASSERT: "eglDestroyContext(mEglDisplay, mEglContext) == EGL_TRUE" in file ../../../src/ubuntumirclient/glcontext.cpp, line 70
Loading module: 'libubuntu_application_api_desktop_mirclient.so.2.9.0'
[1427269746.575630] Loader: Loading modules from: /usr/lib/i386-linux-gnu/mir/client-platform/
[1427269746.576432] Loader: Loading module: /usr/lib/i386-linux-gnu/mir/client-platform/dummy.so
...
==============

ProblemType: Crash
DistroRelease: Ubuntu 15.04
Package: unity8 8.02+15.04.20150318-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-45.74-generic 3.13.11-ckt13
Uname: Linux 3.13.0-45-generic i686
ApportVersion: 2.16.2-0ubuntu4
Architecture: i386
Date: Tue Mar 24 17:31:02 2015
ExecutablePath: /usr/bin/unity8-dash
InstallationDate: Installed on 2012-10-07 (898 days ago)
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release i386 (20120817.3)
ProcCmdline: unity8-dash --desktop_file_hint=/usr/share/applications/unity8-dash.desktop
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
Signal: 6
SourcePackage: unity8
StacktraceTop:
 QMessageLogger::fatal(char const*, ...) const () from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
 qt_assert(char const*, char const*, int) () from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
 ?? () from /usr/lib/i386-linux-gnu/qt5/plugins/platforms/libqpa-ubuntumirclient.so
 ?? () from /usr/lib/i386-linux-gnu/qt5/plugins/platforms/libqpa-ubuntumirclient.so
 QOpenGLContext::destroy() () from /usr/lib/i386-linux-gnu/sse2/libQt5Gui.so.5
Title: unity8-dash crashed with SIGABRT in QMessageLogger::fatal()
UpgradeStatus: Upgraded to vivid on 2015-01-31 (52 days ago)
UserGroups: adm lpadmin nopasswdlogin sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 qt_message_fatal (context=..., message=...) at global/qlogging.cpp:1415
 QMessageLogger::fatal (this=0xbfaedd48, msg=0xb6535b14 "ASSERT: \"%s\" in file %s, line %d") at global/qlogging.cpp:636
 qt_assert (assertion=0xb3b5e698 "eglDestroyContext(mEglDisplay, mEglContext) == EGL_TRUE", file=0xb3b5e66c "../../../src/ubuntumirclient/glcontext.cpp", line=70) at global/qglobal.cpp:2868
 UbuntuOpenGLContext::~UbuntuOpenGLContext (this=0x9ea5fb8, __in_chrg=<optimized out>) at ../../../src/ubuntumirclient/glcontext.cpp:70
 UbuntuOpenGLContext::~UbuntuOpenGLContext (this=0x9ea5fb8, __in_chrg=<optimized out>) at ../../../src/ubuntumirclient/glcontext.cpp:71

[Gerry Boland (gerboland)]

I'm still struggling to reproduce this. Another suspicion I have is ibus being loaded. Could you do

stop unity8-dash
initctl unset-env --global QT_IM_MODULE
start unity8-dash

and see if that makes any difference. Thanks

[Alberto Mardegan (mardy)]

I'm not sure how I can give the above command. If I run it from a terminal (which is not running withing unity8, though, but from another tty), I get this:

   stop: Name "com.ubuntu.Upstart" does not exist

Are there any other ways to issue that command?

[Daniel van Vugt (vanvugt)]

I'm not sure how or if this might be related to Mir at all. But filing it in the Mir project till the possibility is excluded.

[Gerry Boland (gerboland)]

@mardy looks like your shell does not have the correct values for DBUS_SESSION_BUS_ADDRESS and UPSTART_SESSION. These commands will try fetch those values from the unity8 process:

export `xargs -n 1 -0 < /proc/$(pidof unity8)/environ | grep DBUS_SESSION_BUS_ADDRESS`
export `xargs -n 1 -0 < /proc/$(pidof unity8)/environ | grep UPSTART_SESSION`

[Alberto Mardegan (mardy)]

With the proper environment variable I could issue the commands suggested in comment #7, but that didn't help: no difference. :-(

I also tried unsetting the QT_QPA_PLATFORMTHEME variable and manually setting the QT_QPA_PLATFORM variable to "ubuntumirclient", but nothing helped.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Timo Jyrinki (timo-jyrinki)]

I got this in qemu logging into unity8 session in yakkety.

[doniks (kaabud-lp)]

I get this constantly crashing&restarting scopes window after roughly the following steps
- new installation of ubuntu 16.04.2
- add stable phone overlay ppa
- apt install unity8-desktop-session
- apt dist-upgrade
- log out of unity7
- log into unity8

(steps are typed from memory. if it helps I can redo the installation and note the steps down exactly.)

[doniks (kaabud-lp)]

> if it helps I can redo the installation and note the steps down exactly.
uhm, no, sorry. I DID redo the installation, but now I can NOT reproduce the problem

[Launchpad Janitor (janitor)]

[Expired for unity8 (Ubuntu) because there has been no activity for 60 days.]