原来加载的设备文件产看可知如下：
$cat /sys/devices/bone_capemgr.9/slots
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-2G5: ff:P-O-L Bone-Black-HDMI,00A0,Texas Instrument,BB-BONELT-HDMI
在boot的uEnv.txt文件中添加如下
//SFE ADDoptargs=quiet capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN
添加之后：
root@beaglebone:~# cat /sys/devices/bone_capemgr.9/slots0: 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-2G5: ff:P-O-- Bone-Black-HDMI,00A0,Texas Instrument,BB-BONELT-HDMI6: ff:P-O-- Bone-Black-HDMIN,00A0,Texas Instrument,BB-BONELT-HDMIN