Jailbreaking my car's navigation system just so I can change the time | nns.ee

A 2014 Renault Latitude owner has documented jailbreaking the car’s TomTom Carminat LIVE navigation unit to restore access to the clock-setting function after the vehicle’s dashboard displayed the wrong time following Estonia’s switch from UTC+3 to UTC+2. The unit, codenamed “beaumont” and built on a Samsung S5P6440 SoC running TomTom’s Linux 2.6.28.10-based OS, omitted the “Set time” option unless a navigation map SD card was present; without it, one settings button showed only Bluetooth and phonebook options while the other returned “No maps detected!” The owner extracted the firmware update’s ttsystem file, an ext3 root filesystem, after finding prior reverse-engineering work on GitHub by andronedev. The case highlights how embedded automotive software can tie basic functions such as clock adjustment to proprietary map media and outdated firmware. What to watch next: whether the owner publishes a reproducible method or modified firmware, and whether other Renault–TomTom owners report the same dependency.