Comment 6 for bug 1532607

Thanks for the logs. /var/log/syslog, /home/phablet/.cache/upstart and /var/crash are usually good place to start gathering information.

From syslog lightdm restarted
Jan 10 13:31:17 ubuntu-phablet kernel: [62846.465084]init: lightdm main process (1966) terminated with status 1
Jan 10 13:31:17 ubuntu-phablet kernel: [62846.465143]init: lightdm main process ended, respawning

Which could be due to mir stopping according to this error unity.log.3.gz
[1452429068.600713] <ERROR> mircommon: Caught exception at Mir/EGL driver boundary (in queueBuffer): /build/mir-4B0JBP/mir-0.18.0+15.04.20151216.1/src/client/buffer_stream.cpp(169): Throw in function virtual MirWaitHandle* {anonymous}::ExchangeSemantics::submit(const std::function<void()>&, mir::geometry::Size, MirPixelFormat, int)
Dynamic exception type: N5boost16exception_detail10clone_implINS0_19error_info_injectorISt13runtime_errorEEEE
std::exception::what: disconnected: no new buffers

[1452429068.629109] <ERROR> mircommon: Caught exception at Mir/EGL driver boundary (in queueBuffer): /build/mir-4B0JBP/mir-0.18.0+15.04.20151216.1/src/client/buffer_stream.cpp(169): Throw in function virtual MirWaitHandle* {anonymous}::ExchangeSemantics::submit(const std::function<void()>&, mir::geometry::Size, MirPixelFormat, int)
Dynamic exception type: N5boost16exception_detail10clone_implINS0_19error_info_injectorISt13runtime_errorEEEE
std::exception::what: disconnected: no new buffers

[1452429068.662103] <ERROR> mircommon: Caught exception at Mir/EGL driver boundary (in queueBuffer): /build/mir-4B0JBP/mir-0.18.0+15.04.20151216.1/src/client/buffer_stream.cpp(169): Throw in function virtual MirWaitHandle* {anonymous}::ExchangeSemantics::submit(const std::function<void()>&, mir::geometry::Size, MirPixelFormat, int)
Dynamic exception type: N5boost16exception_detail10clone_implINS0_19error_info_injectorISt13runtime_errorEEEE
std::exception::what: disconnected: no new buffers

qtmir.mir: SessionListener::stopping - this= SessionListener(0xb191eed4) session= 0xae201d54
[1452429068.693550] <ERROR> mircommon: Caught exception at Mir/EGL driver boundary (in queueBuffer): /build/mir-4B0JBP/mir-0.18.0+15.04.20151216.1/src/client/buffer_stream.cpp(169): Throw in function virtual MirWaitHandle* {anonymous}::ExchangeSemantics::submit(const std::function<void()>&, mir::geometry::Size, MirPixelFormat, int)
Dynamic exception type: N5boost16exception_detail10clone_implINS0_19error_info_injectorISt13runtime_errorEEEE
std::exception::what: disconnected: no new buffers

Signal caught by Mir, stopping Mir server..

@Uranicus, is there any crash file from the date of the incident in /var/crash?

Thanks.