BeagleBone Black System
Reference Manual
Page 22 of 108
Figure 15. Board Boot Status
While the four user LEDS can be over written and used as desired, they do have specific
meanings in the image that is shipped with the board once the Linux kernel has booted.
USER0 is the heartbeat indicator from the Linux kernel.
USER1 turns on when the SD card is being accessed
USER2 is an activity indicator. It turns on when the kernel is not in the idle loop.
USER3 turns on when the onboard eMMC is being accessed.
8. A Booted System
1. The board will have a mouse pointer appear on the screen as it enters the Linux
boot step. You may have to move the physical mouse to get the mouse pointer to
appear. The system can come up in the suspend mode with the HDMI port in a
sleep mode.
2. After a minute or two a login screen will appear. You do not have to do anything
at this point.
3. After a minute or two the desktop will appear. It should be similar to the one
shown in Figure 16. HOWEVER, it will change from one release to the next, so
do not expect your system to look exactly like the one in the figure, but it will be
very similar.
4. And at this point you are ready to go! Figure 16 shows the desktop after booting.
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