U232 P9 Driver Exclusive 2021

Drivers vary by manufacturer, but the U232-P9 chip is most commonly supported by Magic Control Technology (MCT).

Exclusive mode prevents other processes from opening the serial port while your application has it. That avoids data conflicts, unexpected reads/writes, and port-sharing bugs in applications like terminal programs, device managers, or debugging tools. u232 p9 driver exclusive

  • Disable services that may probe serial ports (ModemManager, brltty): sudo systemctl stop ModemManager; sudo systemctl disable ModemManager
  • The solution to the specter of the “U232 P9 Driver Exclusive” lies in radical transparency. The open-source hardware movement, championed by RISC-V and projects like OpenPOWER (which IBM has contributed to), argues that such drivers should not be exclusive at all. Instead, debug interfaces should be fully documented, and the drivers to access them should be open source. The philosophy is simple: a user who buys a computer should own the entire stack, down to the serial console. If a vulnerability exists, it should be a known vulnerability that can be patched or physically disconnected (by removing a jumper on the UART header), not an exclusive secret wielded by a distant authority. Drivers vary by manufacturer, but the U232-P9 chip