[regression] Mir servers crash on start-up. "dummy" graphics driver selected and then: ERROR: Dynamic exception type: St13runtime_error - std::exception::what: Link failed:

[Daniel van Vugt]

All Mir demo servers are now crashing on start-up, with very little explanation:

[1437011956.469215] mirserver: Selected driver: dummy (version 0.15.0)
[1437011956.492673] mirserver: Using software cursor
[1437011956.493899] mirserver: Mir version 0.15.0
ERROR: Dynamic exception type: St13runtime_error
std::exception::what: Link failed:

[Daniel van Vugt (vanvugt)]

Bisected the issue. It was introduced in:

------------------------------------------------------------
revno: 2742 [merge]
author: Cemil Azizoglu <email address hidden>
committer: Tarmac
branch nick: development-branch
timestamp: Tue 2015-07-14 10:05:04 +0000
message:
  Use command line options during platform probe.

  Approved by PS Jenkins bot, Chris Halse Rogers, Alexandros Frantzis.
------------------------------------------------------------

[Daniel van Vugt (vanvugt)]

Fix committed: Reverted r2742 in r2746.

[Cemil Azizoglu (cemil-azizoglu)]

I'm not sure what you saw but I don't think it was caused by this.

[Daniel van Vugt (vanvugt)]

I am sure because I bisected the issue meaning that I verified r2741 works and r2742 doesn't.

[Daniel van Vugt (vanvugt)]

And crashing again in r2749 :(

[1437011956.469215] mirserver: Selected driver: dummy (version 0.15.0)
[1437011956.492673] mirserver: Using software cursor
[1437011956.493899] mirserver: Mir version 0.15.0
ERROR: Dynamic exception type: St13runtime_error
std::exception::what: Link failed:

Verified r2748 does not have the crash:

[1437011965.849147] mirserver: Selected driver: mesa-kms (version 0.15.0)
[1437011966.168966] mirserver: Using hardware cursor
[1437011966.169684] mirserver: Mir version 0.15.0
[1437011966.174499] mirserver: GL vendor: Intel Open Source Technology Center
[1437011966.174518] mirserver: GL renderer: Mesa DRI Intel(R) Haswell Desktop
[1437011966.174525] mirserver: GL version: OpenGL ES 3.0 Mesa 10.5.9
[1437011966.174531] mirserver: GLSL version: OpenGL ES GLSL ES 3.00
[1437011966.174540] mirserver: GL max texture size = 8192
[1437011966.174556] mirserver: GL framebuffer bits: RGBA=8880, depth=0, stencil=0

[Daniel van Vugt (vanvugt)]

The error appears to originate in gl_program_family.cpp, so could be driver specific. I'm using Intel i915.

[Daniel van Vugt (vanvugt)]

It might be related to bug 1416482 which was around the same area.

[Daniel van Vugt (vanvugt)]

And r2749 built with clang looks similar:

[1437014933.264840] mirserver: Selected driver: dummy (version 0.15.0)
[1437014933.280540] mirserver: Using software cursor
[1437014933.281941] mirserver: Mir version 0.15.0
[1437014933.282095] mirserver: GL vendor:
[1437014933.282104] mirserver: GL renderer:
[1437014933.282107] mirserver: GL version:
[1437014933.282109] mirserver: GLSL version:
[1437014933.282113] mirserver: GL max texture size = 0
[1437014933.282115] mirserver: GL framebuffer bits: RGBA=0000, depth=0, stencil=0
ERROR: Dynamic exception type: St13runtime_error
std::exception::what: Link failed: ����(

[Daniel van Vugt (vanvugt)]

Uh, of course the problem was staring at me right there on the first line:

[1437014933.264840] mirserver: Selected driver: dummy (version 0.15.0)

That's not a driver that will work. :)

[Andreas Pokorny (andreas-pokorny)]

could it be that you excluded mesa-kms from the build i.e. maybe by still having 'mesa' inside MIR_PLATFORM (CMakeCache.txt).
Additionally the why is that log so short. It should mention the other drivers found.. so even if the MIR_PLATFORM is wrong android platform binary should be listed.

[Cemil Azizoglu (cemil-azizoglu)]

Daniel, since none of us here are having any luck reproducing this issue, can I get your help looking into this? Could it be something specific to your environment/setup?

[Cemil Azizoglu (cemil-azizoglu)]

... or perhaps to the way you run the server? I build and run locally from uninstalled binaries.

[Cemil Azizoglu (cemil-azizoglu)]

I made some tweaks. Can you try with this branch? lp:~cemil-azizoglu/mir/use-options-on-probing
Thanks

[Daniel van Vugt (vanvugt)]

The log is not "short". I just copied and pasted the relevant bits :)