STM32VLDISCOVERY & OpenSTM32?
By my knowledge the built-in debugger on STM32LVDISCOVERY is ST-Link v1, which is not support well by OpenSTM32. So the answer. is you better to play ST boards other than STM32LVDISCOVERY on OpenSTM32.
If you really want to play STM32LVDISCOVERY, you may try it on Atollic TrueStudio.
-Andy