You may be running into an issue with cape-universal and/or u-boot overlays.
Please paste the contents of: /sys/devices/platform/bone_capemgr/slots /boot/uEnv.txt /etc/dogtag /etc/debian_version There should also be this script to print out more system version info: /opt/scripts/tool/version.sh (I'm typing from memory on my phone so I may have typos in the above paths) Thanks, Drew On Dec 3, 2017 9:16 AM, <jlemke...@gmail.com> wrote: I have previously set up the device tree overlay for UART with no problems using Debian Version 7x. In short, I compiled a device tree source file into a .dtbo file, and then loaded the overlay .dtbo file using the following: echo BB-UART2 > /sys/devices/bone_capemgr.*/slots // this works for debian version 7x and earlier It appears Debian version 8x has changed this location slightly and now is /sys/devices/platform/bone_capemgr/slots. when I compile the device tree source file and attempt to load using: echo BB-UART2 > /sys/devices/platform/bone_capemgr/slots I get the following response: -bash: echo: write error: File exists And the UART2 does not work I would like to know what I should be doing in Debian 8x to get this working. Thanks -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/ msgid/beagleboard/5d5a5812-36c3-49ca-a0c4-201dc18679f6%40googlegroups.com <https://groups.google.com/d/msgid/beagleboard/5d5a5812-36c3-49ca-a0c4-201dc18679f6%40googlegroups.com?utm_medium=email&utm_source=footer> . For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAEf4M_C4inCpcwF1k6Q_jCn9jusd-t%2BS65%2B88%2BnSRYQ4u-Q9aw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
