Thank you for the reply.

I tried on a first BeagleBone and it did not work.

I tried on a second BeagleBone Green (transferring the SD Card) and last night 
it worked all the times I tried.

This morning, however, it does not work anymore


Da: Robert Nelson
Inviato: venerdì 3 novembre 2017 19:50
A: Beagle Board; Claudio La Rosa
Oggetto: Re: [beagleboard] Trouble disabling HDMI + EMMC overlays?

On Fri, Nov 3, 2017 at 12:20 PM, Claudio La Rosa
<claudiocplar...@gmail.com> wrote:
> Hi!
>
> I have this /boot/uEnv.txt on my SD Card (beagleBone Green):
>
> #Docs: http://elinux.org/Beagleboard:U-boot_partitioning_layout_2.0
> uname_r=4.4.91-ti-r133
> #uuid=
> #dtb=
>
> ###U-Boot Overlays###
> ###Documentation:
> http://elinux.org/Beagleboard:BeagleBoneBlack_Debian#U-Boot_Overlays
> ###Master Enable
> #enable_uboot_overlays=1
> ###
> ###Overide capes with eeprom
> #uboot_overlay_addr0=/lib/firmware/<file0>.dtbo
> #uboot_overlay_addr1=/lib/firmware/<file1>.dtbo
> #uboot_overlay_addr2=/lib/firmware/<file2>.dtbo
> #uboot_overlay_addr3=/lib/firmware/<file3>.dtbo
> ###
> ###Additional custom capes
> #uboot_overlay_addr4=/lib/firmware/<file4>.dtbo
> #uboot_overlay_addr5=/lib/firmware/<file5>.dtbo
> #uboot_overlay_addr6=/lib/firmware/<file6>.dtbo
> #uboot_overlay_addr7=/lib/firmware/<file7>.dtbo
> ###
> ###Custom Cape
> #dtb_overlay=/lib/firmware/<file8>.dtbo
> ###
> ###Disable auto loading of virtual capes (emmc/video/wireless/adc)
> #disable_uboot_overlay_emmc=1
> #disable_uboot_overlay_video=1
> #disable_uboot_overlay_audio=1
> #disable_uboot_overlay_wireless=1
> #disable_uboot_overlay_adc=1
> ###
> ###PRUSS OPTIONS
> ###pru_rproc (4.4.x-ti kernel)
> #uboot_overlay_pru=/lib/firmware/AM335X-PRU-RPROC-4-4-TI-00A0.dtbo
> ###pru_uio (4.4.x-ti & mainline/bone kernel)
> #uboot_overlay_pru=/lib/firmware/AM335X-PRU-UIO-00A0.dtbo
> ###
> ###Cape Universal Enable
> #enable_uboot_cape_universal=1
> ###
> ###Debug: disable uboot autoload of Cape
> #disable_uboot_overlay_addr0=1
> #disable_uboot_overlay_addr1=1
> #disable_uboot_overlay_addr2=1
> #disable_uboot_overlay_addr3=1
> ###
> ###U-Boot fdt tweaks...
> #uboot_fdt_buffer=0x60000
> ###U-Boot Overlays###
> #cmdline=coherent_pool=1M net.ifnames=0 quiet
> cmdline=coherent_pool=1M quiet init=/lib/systemd/systemd
> #In the event of edid real failures, uncomment this next line:
> #cmdline=coherent_pool=1M net.ifnames=0 quiet video=HDMI-A-1:1024x768@60e
> ##Example v3.8.x
> #cape_disable=capemgr.disable_partno=
> #cape_enable=capemgr.enable_partno=
> ##Example v4.1.x
> cape_disable=bone_capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN,BB-BONE-EMMC-2G
> #cape_enable=bone_capemgr.enable_partno=
> ##enable Generic eMMC Flasher:
> ##make sure, these tools are installed: dosfstools rsync
> #cmdline=init=/opt/scripts/tools/eMMC/init-eMMC-flasher-v3.sh
> dtb=am335x-boneblack-overlay.dtb
>
> The only uncommented line are:
> cape_disable=bone_capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN,BB-BONE-EMMC-2G
> dtb=am335x-boneblack-overlay.dtb
>
> But the P8_3...P8_6 and P8_20...P8_25 pins do not work.

Remove both of those changes, if you want to disable
hdmi/hdmi-audio/emmc with newer images you have to follow these
directions:

https://elinux.org/Beagleboard:BeagleBoneBlack_Debian#U-Boot_Overlays

enable_uboot_overlays=1
disable_uboot_overlay_emmc=1
disable_uboot_overlay_video=1
enable_uboot_cape_universal=1

Regards,

-- 
Robert Nelson
https://rcn-ee.com/

-- 
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