"standalone" demos crash when running on X11

[Alan Griffiths]

Much the same happens for all three (mir_demo_standalone_render_surfaces, mir_demo_standalone_render_to_fb & mir_demo_standalone_render_overlay). Like this...

$ bin/mir_demo_standalone_render_to_fb || echo FAILED
MIR_CLIENT_PLATFORM_PATH=bin/../lib/client-modules/
MIR_SERVER_PLATFORM_PATH=bin/../lib/server-modules/
LD_LIBRARY_PATH=bin/../lib
exec=bin/mir_demo_standalone_render_to_fb.bin
[2016-03-17 17:07:28.206281] mirplatform: Found graphics driver: mir:android (version 0.21.0)
[2016-03-17 17:07:28.207053] mirplatform: Found graphics driver: mir:mesa-kms (version 0.21.0)
[2016-03-17 17:07:28.207915] mirplatform: Found graphics driver: mir:mesa-x11 (version 0.21.0)
[2016-03-17 17:07:28.208043] mirplatform: Found graphics driver: throw-on-creation (version 0.21.0)
[2016-03-17 17:07:28.208062] mirplatform: Found graphics driver: dummy (version 0.21.0)
[2016-03-17 17:07:28.208589] mircommon: Loading modules from: bin/../lib/server-modules/
[2016-03-17 17:07:28.208656] mircommon: Loading module: bin/../lib/server-modules/graphics-android.so.8
[2016-03-17 17:07:28.209366] mircommon: Loading module: bin/../lib/server-modules/graphics-mesa-kms.so.8
[2016-03-17 17:07:28.209731] mircommon: Loading module: bin/../lib/server-modules/server-mesa-x11.so.8
[2016-03-17 17:07:28.209753] mircommon: Loading module: bin/../lib/server-modules/input-evdev.so.5
[2016-03-17 17:07:28.212134] mircommon: Loading module: bin/../lib/server-modules/input-stub.so
[2016-03-17 17:07:28.213083] mircommon: Loading module: bin/../lib/server-modules/graphics-throw.so
[2016-03-17 17:07:28.213859] mircommon: Loading module: bin/../lib/server-modules/graphics-dummy.so
[2016-03-17 17:07:28.216410] mirplatform: Found graphics driver: mir:android (version 0.21.0)
[2016-03-17 17:07:28.217152] mirplatform: Found graphics driver: mir:mesa-kms (version 0.21.0)
[2016-03-17 17:07:28.217720] mirplatform: Found graphics driver: mir:mesa-x11 (version 0.21.0)
[2016-03-17 17:07:28.217793] mirplatform: Found graphics driver: throw-on-creation (version 0.21.0)
[2016-03-17 17:07:28.217809] mirplatform: Found graphics driver: dummy (version 0.21.0)
[2016-03-17 17:07:28.218007] mirserver: Selected driver: mir:mesa-x11 (version 0.21.0)
[2016-03-17 17:07:28.225821] x11-display: EGL Version 1.4
[2016-03-17 17:07:28.225868] x11-display: 1 configs found
[2016-03-17 17:07:28.225876] x11-display: 1 visuals found
[2016-03-17 17:07:28.225891] x11-display: Pixel depth = 24
Segmentation fault (core dumped)
FAILED

Now, mir_demo_standalone_render_overlay isn't supported on mesa - we should make that clear..

[Daniel van Vugt (vanvugt)]

Half fixed in lp:mir, although I'm not sure if that's a recent improvement...

mir_demo_standalone_render_to_fb: Works on KMS but not X11 still (segfault).
mir_demo_standalone_render_surfaces: Works on both KMS and X11.
mir_demo_standalone_render_overlays: Crashes on KMS, and is just a blank window on X11.

[Daniel van Vugt (vanvugt)]

The crash in mir_demo_standalone_render_to_fb appears to be glClear() segfaulting. Invalid context?...

#0 0x00007f0dd3cee7b5 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
(gdb) bt
#0 0x00007f0dd3cee7b5 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#1 0x00007f0dd3ceed31 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#2 0x00007f0dd3cf021e in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#3 0x000055fdd904a5cb in mir::draw::glAnimationBasic::render_gl (
    this=0x7ffc62fda7d0)
    at /home/dan/bzr/mir/trunk/examples/graphics_utils.cpp:129
#4 0x000055fdd9048e66 in <lambda(mir::graphics::DisplaySyncGroup&)>::<lambda(mir::graphics::DisplayBuffer&)>::operator()(mir::graphics::DisplayBuffer &) const
    (__closure=0x7ffc62fda6e0, buffer=...)
    at /home/dan/bzr/mir/trunk/examples/render_to_fb.cpp:76

[Daniel van Vugt (vanvugt)]

Can't tell if this was Fix Released in 0.26.0 or if that was a partial fix and the status should be triaged still.

[Daniel van Vugt (vanvugt)]

Confirmed mir_demo_standalone_render_to_fb still segfaults on X.

But note bug 1663130 has confused the situation further.

[Michał Sawicz (saviq)]

Syncing task from Mir.