opkg install dtc
wget http://pignology.net/blackdts.tgz
tar xvzf blackdts.tgz
cd blackdts
sh ./make.sh
mv /boot/am335x-boneblack.dtb /boot/am335x-boneblack.orig.dtb
mv am335x-boneblack.dtb /boot/
reboot
dmesg | grep ttyO1 	note “O” = Capital Letter O. Should see output:                            [0.509652] 48022000.serial: ttyO1 at MMIO 0x48022000 (irq = 89) is a OMAP UART1
ls –al /dev/ttyO1	to verify that /dev/ttyO1 exists. Should see output:
crw-rw---- 1 root dialout 250, 1 Jan  1  2000 /dev/tty01
wget http://pignology.net/uart2pinmux.dts
dtc –O dtb –o uart2pinmux-00A0.dtbo –b 0 -@ uart2pinmux.dts
                         ^^ ^         ^   ? Note zeros    
mv uart2pinmux-00A0.dtbo /lib/firmware/
export PINS=/sys/kernel/debug/pinctrl/44e10800.pinmux/pins
find / -name bone_capemgr.*	   take note of the output. It will be something like:
/sys/devices/bone_capemgr.9
export SLOTS=insert path from 15 here/slots
cat $SLOTS 		to see what is there. It will appear like:
0: 54:PF---
1: 55:PF---
2: 56:PF---
3: 57:PF---
4: ff:P-O-L Bone-LT-eMMC-2G, 00A0, Texas Instrument, BB-BONE-EMMC-2G
5: ff:P-O-L Bone-Black-HDMI, 00A0, Texas Instrument, BB-BONE-HDMI
cat $Pins | egrep “980|984”		to see what is there. It will appear like:
pin 96 (44e10980) 00000037 pinctrl-single
pin 97 (44e10984) 00000037 pinctrl-single
echo uart2pinmux > $SLOTS
dmesg | tail				should produce lengthy output of unique messages.
cat $SLOTS 				new output should be:
0: 54:PF---
1: 55:PF---
2: 56:PF---
3: 57:PF---
4: ff:P-O-L Bone-LT-eMMC-2G, 00A0, Texas Instrument, BB-BONE-EMMC-2G
5: ff:P-O-L Bone-Black-HDMI, 00A0, Texas Instrument, BB-BONELT-HDMI
6: ff:P-O-L Override Board Name, 00A0, Override Manuf, uart2pinmux
cat $PINS | egrep “980|984”

pin 96 (44e10980) 00000020 pinctrl-single

pin 97 (44e10984) 00000000 pinctrl-single

Now, log off of Angrstrom and log into Ubuntu.
find / -name am335x-boneblack.dtb	and take note of the location in Angstrom’s folder and Ubuntu’s. For example, if the previous path (excluding the filename) was “/media/ubuntu/Angstrom/boot,” you should also see a file path “/boot/uboot/dtbs”
cp the path to the Angstrom destination(with filename) the path to Ubuntu Destination
ls the path to the Ubuntu Destination –al		Make sure that the file you just copied    
							is not “0 bytes.”
reboot
sudo -s
dmesg | grep ttyO1	“O” = capital letter O. This should print something like:         [0.509652] 48022000.serial: ttyO1 at MMIO  0x48022000 (irq =89) is a OMAT UART1
ls –al /dev/ttyO1	to verify the existence of “/dev/ttyO1.”
find / -name firmware		take note of corresponding paths in the Angstrom 
					folder and Ubuntu’s filesystem.
find / -name uart2pinmux-00A0.dtbo   find this file.
				      ^^ ^			? Zeros
cp Angstrom path to file under “firmware”  Corresponding path 
export PINS=/sys/kernel/debug/pinctrl/44e10800.pinmux/pins
find / -name bone_capemgr* take note of the file path that is under the /sys/devices path. Note that “*” represents “all,” as the numbers following bone_capemgr will be different as in step 15.
export SLOTS=the complete path found in 35/slots
cat $SLOTS				should produce a printout like in step 16.
echo uart2pinmux > $SLOTS	Note: Unless you put this in the autostart, this 
				command will be nessessary upon every boot.
dmesg | tail			check for a lengthy printout
cat $SLOTS				now, the 6th line should appear. (like in step 20)