Too long starting dolphin after suspend2ram

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emerge --info

Sometimes (I couldn't find out any regularity of) after a wakening the system from suspend2ram Dolphin (and even any windows related to file management, e.g. opening or saving dialogs) is launched very, very slow (about 20-30 seconds). Screenshot with strace dolphin, the launching is slowed on last line. But after I restart dbus service (/etc/init.d/dbus restart) Dolphin is launched as it usually does (2-3 seconds).

What's wrong with my system?