Public bug reported:
When trying to run the Unity 8 session on an up to date wily laptop
(using the unity8-desktop-session-mir package) I'm only seeing a black
screen.
Digging down, it appears when running a Mir server in compositor mode
the Mir clients are unable to create surfaces.
To reproduce:
1. Switch to VT1
2. Run a Mir server in compositor mode:
$ sudo mir_demo_server --window-manager system-compositor --arw-file
3. Switch to VT2
4. Run a Mir client:
$ MIR_SOCKET=/tmp/mir_socket mir_demo_client_basic
5. Switch to VT1
6. Switch to VT2
Expected result:
The client runs successfully
Observed result:
The client hits an assertion that the surface is not valid.
Using a modified client to see the error message (see lp:~robert-
ancell/mir/basic-client-print-surface-error) it gives:
Error processing request: Failed to place surface in requested output
Internal error details:
/build/mir-QIEYOz/mir-0.15.0+15.10.20150818/src/server/shell/graphics_display_layout.cpp(91):
Throw in function virtual void
mir::shell::GraphicsDisplayLayout::place_in_output(mir::graphics::DisplayConfigurationOutputId,
mir::geometry::Rectangle&)
Dynamic exception type:
boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<std::runtime_error>
>
std::exception::what: Failed to place surface in requested output
The above steps work file if the --window-manager system-compositor
flag is removed.
This used to work before and appears to work on some up to date wily
systems.
** Affects: mir (Ubuntu)
Importance: Critical
Status: Confirmed
** Changed in: mir (Ubuntu)
Importance: Undecided => Critical
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https://bugs.launchpad.net/bugs/1488431
Title:
Clients fail to create surfaces when using Mir server in compositor
mode
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