After connecting the Nucleo to my PC, the RG LED turns red (was green when everything worked). When I run “openocd -f /usr/share/openocd/scripts/board/st_nucleo_f401re.cfg” I get following output: Info : This adapter doesn't support configurable speed Info : STLINK v2 JTAG v19 API v2 SWIM v3 VID 0x…

ST Nucleo F4 OpenOCD "init mode failed"

hsutherl June 3, 2014, 1:14am 4

You might try running openocd as root.

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