root@ubuntu-phablet:~# cat ~/usc-gdb.log
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Reading symbols from unity-system-compositor...(no debugging symbols found)...done.
Starting program: /usr/sbin/unity-system-compositor --debug-without-dm
Cannot parse expression `.L1185 4@r4'.
warning: Probes-based dynamic linker interface failed.
Reverting to original interface.

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/arm-linux-gnueabihf/libthread_db.so.1".
[1970-10-01 05:35:31.492958] mirplatform: Found graphics driver: mir:android (version 0.24.2)
[1970-10-01 05:35:31.493916] mirplatform: Found graphics driver: mir:android-caf (version 0.24.2)
[1970-10-01 05:35:31.560159] mirserver: Starting
[1970-10-01 05:35:31.560726] mircommon: Loading modules from: /usr/lib/arm-linux-gnueabihf/mir/server-platform
[1970-10-01 05:35:31.560961] mircommon: Loading module: /usr/lib/arm-linux-gnueabihf/mir/server-platform/graphics-android.so.10
[1970-10-01 05:35:31.566662] mircommon: Loading module: /usr/lib/arm-linux-gnueabihf/mir/server-platform/graphics-android-caf.so.10
[1970-10-01 05:35:31.566844] mircommon: Loading module: /usr/lib/arm-linux-gnueabihf/mir/server-platform/input-evdev.so.5
[1970-10-01 05:35:31.575805] mirplatform: Found graphics driver: mir:android (version 0.24.2)
[1970-10-01 05:35:31.576535] mirplatform: Found graphics driver: mir:android-caf (version 0.24.2)
[1970-10-01 05:35:31.585238] mirserver: Selected driver: mir:android-caf (version 0.24.2)
library "libgui.so" wasn't loaded and RTLD_NOLOAD prevented it

Program received signal SIGINT, Interrupt.
0xf6bcacec in nanosleep () from /android/system/lib/libc.so
#0  0xf6bcacec in nanosleep () from /android/system/lib/libc.so
No symbol table info available.
#1  0xf6baf56c in sleep () from /android/system/lib/libc.so
No symbol table info available.
#2  0xf6b2d1ea in android::defaultServiceManager() () from /android/system/lib/libbinder.so
No symbol table info available.
#3  0xf6887de2 in qService::QService::init() () from /android/system/lib/libqservice.so
No symbol table info available.
#4  0xf68ccc6e in sdm::HWCSession::Init() () from /android/system/lib/hw/hwcomposer.msm8953.so
No symbol table info available.
#5  0xf68cd0ea in sdm::HWCSession::Open(hw_module_t const*, char const*, hw_device_t**) ()
   from /android/system/lib/hw/hwcomposer.msm8953.so
No symbol table info available.
#6  0xf6a1cb7c in ?? ()
No symbol table info available.
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
root@ubuntu-phablet:~#