When target running under GDB Server session (with breakpoints set) I connect to target by any JLink utility (for example, just launch JLink Commander). This causes breakpoints not hit anymore until I do something with debugger (for example, just pause and continue running).
STM3220G-EVAL Rev.B board (ARM Cortex-M3)
Windows 7 Pro SP1 64-bit
DLL version V4.80g, compiled Feb 13 2014 20:50:02
Firmware: J-Link ARM-Pro V3.x compiled Sep 19 2013 20:11:52
Hardware: V3.00
STM3220G-EVAL Rev.B board (ARM Cortex-M3)
Windows 7 Pro SP1 64-bit