Description of problem: I use a Sierra Wireless MC8781 UMTS Modem. In Fedora 18 Apha Release Live CD the Modem works perfectly. After logging in the NetworkManager ask me for the SIM-PIN and it then connects after setting the APN etc. But in the nightly from the 16. November 2012 the modem-manager crashes after logging in. And i can't use the Modem. It is still listed in the output of lsusb as it was in the Alpha Release. Version-Release number of selected component: ModemManager-0.6.0.0-1.fc18 Additional info: libreport version: 2.0.18 abrt_version: 2.0.17 backtrace_rating: 4 cmdline: /usr/sbin/modem-manager crash_function: supports_callback kernel: 3.6.6-3.fc18.x86_64 truncated backtrace: :Thread no. 1 (3 frames) : #3 supports_callback at mm-manager.c:715 : #4 mm_plugin_base_supports_task_complete at mm-plugin-base.c:335 : #9 emit_probe_result at mm-plugin-base.c:610
Created attachment 647402 [details] File: core_backtrace
Created attachment 647403 [details] File: environ
Created attachment 647404 [details] File: var_log_messages
Created attachment 647405 [details] File: backtrace
Created attachment 647406 [details] File: limits
Created attachment 647407 [details] File: cgroup
Created attachment 647408 [details] File: executable
Created attachment 647409 [details] File: maps
Created attachment 647410 [details] File: dso_list
I downgraded from ModemManager.x86_64 0:0.6.0.0-1.fc18 to ModemManager.x86_64 0:0.5.999-0.2.fc18 and now it works.
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