my problem is that I need to “switch” between using the display cape and the HDMI output of my BeagleBone Black Rev C. I can’t always detach the Display Cape when I want to use HDMI because I plan on fitting my BBB in a permanent case.
Is there a possibility to use the HDMI output when the Display Cape is attached to the Board? I can’t seem to find an answer in any other questions or forums so I would really appreciate some help.
I’m currently using debian 9.5 with following kernel: 4.14.49-ti-r54
I’ve tried editing the /boot/uEnv.txt file to disable loading the Cape, but I’ve always come up with an error.
When I disable uboot_overlays and power up my BBB, the user LEDs start blinking but after a few seconds only the heartbeat LED is on, while the other LEDs are off permanently. On the screen I can only see the startup “penguin icon” but it’s like the BBB froze.
I’ve also tried uncommenting disable_uboot_overlay_addr0= and enabling uboot_overlays but then the same thing happens to the LEDs while my monitor doesn’t even recognize a HDMI device.
I am really stuck because I think it has to be possible to disable the Display Cape but I can’t figure out how. Thank you in advance.
P.S: further information about my BBB
output of version.sh:
debian@beaglebone:~$ sudo /opt/scripts/tools/version.sh
dogtag:[BeagleBoard.org Debian Image 2018-06-17]
bootloader:[microSD-(push-button)]:[/dev/mmcblk0]:[U-Boot 2018.03-00002-gac9cce7c6a]:[location: dd MBR]
pkg check: to individually upgrade run: [sudo apt install --only-upgrade ]
groups:[debian : debian adm kmem dialout cdrom floppy audio dip video plugdev users systemd-journal i2c bluetooth netdev cloud9ide gpio pwm eqep admin spi tisdk weston-launch xenomai]
cmdline:[console=ttyO0,115200n8 bone_capemgr.uboot_capemgr_enabled=1 root=/dev/mmcblk0p1 ro rootfstype=ext4 rootwait coherent_pool=1M net.ifnames=0 quiet]
dmesg | grep pinctrl-single
[ 1.021968] pinctrl-single 44e10800.pinmux: 142 pins at pa f9e10800 size 568
dmesg | grep gpio-of-helper
[ 1.023167] gpio-of-helper ocp:cape-universal: ready