This happened because rhythmbox and gvfs cannot both access the same MTP device at the same time. The MTP protocol doesn't support multiple clients. Rhytmbox's attempt to communicate with the device kills gvfs' session, resulting in this.
You should explicitly unmount the device in Nautilus before attempting to interact with it through Rhythmbox. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gvfs in Ubuntu. https://bugs.launchpad.net/bugs/1121285 Title: gvfsd-mtp crashed with SIGSEGV in do_sync_bulk_transfer() Status in “gvfs” package in Ubuntu: Confirmed Bug description: Error occured when dropping a playlist on the media player device icon in Rhythmbox. ProblemType: Crash DistroRelease: Ubuntu 13.04 Package: gvfs-backends 1.15.2-0ubuntu3 ProcVersionSignature: Ubuntu 3.8.0-5.10-generic 3.8.0-rc6 Uname: Linux 3.8.0-5-generic i686 ApportVersion: 2.8-0ubuntu4 Architecture: i386 CrashCounter: 1 Date: Sun Feb 10 12:59:35 2013 ExecutablePath: /usr/lib/gvfs/gvfsd-mtp InstallationDate: Installed on 2012-11-08 (93 days ago) InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha i386 (20121107.2) MarkForUpload: True ProcCmdline: /usr/lib/gvfs/gvfsd-mtp --spawner :1.7 /org/gtk/gvfs/exec_spaw/4 SegvAnalysis: Segfault happened at: 0xb70e6393: mov 0x1c(%eax),%eax PC (0xb70e6393) ok source "0x1c(%eax)" (0x0000001c) not located in a known VMA region (needed readable region)! destination "%eax" ok Stack memory exhausted (SP below stack segment) SegvReason: reading NULL VMA Signal: 11 SourcePackage: gvfs StacktraceTop: ?? () from /lib/i386-linux-gnu/libusb-1.0.so.0 ?? () from /usr/lib/i386-linux-gnu/libmtp.so.9 LIBMTP_Read_Event () from /usr/lib/i386-linux-gnu/libmtp.so.9 ?? () ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0 Title: gvfsd-mtp crashed with SIGSEGV in LIBMTP_Read_Event() UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo vboxusers To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gvfs/+bug/1121285/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

