root@nitrogen6x:/ # adb reboot
SysRq : Emergency Remount R/O
EXT4-fs (mmcblk3p4): re-mounted. Opts: (null)
EXT4-fs (mmcblk3p6): re-mounted. Opts: (null)
Emergency Remount complete
imx2-wdt 20c0000.wdog: Device shutdown: Expect reboot!
reboot: Restarting system with command ''
mxc_restart: Watchdog reset failed to assert reset
The display is going to off. but it was unable to restart again itself.
Again i need to start manually.