On Sunday, April 8, 2018 at 1:03:57 PM UTC-4, RobertCNelson wrote:
> Ah, you found a fun bug in the old path.. I'll fix it up for the next
> person, but you can go down the new path with your setup...
>
> [snip...]
>
> in /boot/uEnv.txt
>
> remove your: dtb=am335x-boneblack-emmc-overlay.dtb
>
> Then set:
>
> enable_uboot_overlays=1
> disable_uboot_overlay_video=1
>
Making this change solved it. I updated my bb_ble_image.sh script to add
--enable-uboot-cape-overlays and move from --dtb beaglebone-nohdmi to --dtb
beagblebone. However, I couldn't see a way when invoking setup_sdcard.sh
to set disable_uboot_overlay_video=1 in uEnv.txt via the command line. So
I made the following change to add a custom --disable-uboot-overlay-video
option to setup_sdcard.sh (which temporarily helps me out in this case!):
diff --git a/tools/setup_sdcard.sh b/tools/setup_sdcard.sh
index 9d86f92..b9de76e 100755
--- a/tools/setup_sdcard.sh
+++ b/tools/setup_sdcard.sh
@@ -1266,7 +1266,11 @@ populate_rootfs () {
echo "###" >> ${wfile}
echo "###Disable auto loading of virtual capes
(emmc/video/wireless/adc)" >> ${wfile}
echo "#disable_uboot_overlay_emmc=1" >> ${wfile}
- echo "#disable_uboot_overlay_video=1" >> ${wfile}
+ if [ "x${uboot_overlay_video}" = "xdisable" ] ; then
+ echo "disable_uboot_overlay_video=1" >>
${wfile}
+ else
+ echo "#disable_uboot_overlay_video=1" >>
${wfile}
+ fi
echo "#disable_uboot_overlay_audio=1" >> ${wfile}
echo "#disable_uboot_overlay_wireless=1" >> ${wfile}
echo "disable_uboot_overlay_adc=1" >> ${wfile}
@@ -2041,6 +2045,9 @@ while [ ! -z "$1" ] ; do
--enable-uboot-pru-rproc-414ti)
uboot_pru_rproc_414ti="enable"
;;
+ --disable-uboot-overlay-video)
+ uboot_overlay_video="disable"
+ ;;
--efi)
uboot_efi_mode="enable"
;;
With this I now have an eMMC flasher image that creates the correct
/boot/uEnv.txt after flashing.
Please let me know if there is a better way to disable video (I just need a
cmd line option vs whitelisting), there are other options that you might
want to control (e.g. audio, adc etc) so maybe a more generalized version
of this would be a nice enhancement.
Many thanks!
-W
--
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