Differences

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--- lwc:hardware:beagle [2023/10/07 16:18] – John Harrison
+++ lwc:hardware:beagle [2026/06/06 06:38] (current) – John Harrison
@@ Line 13: / Line 13: @@
   * [[https://github.com/zestyping/openpixelcontrol|open pixel control]]:the real deal with simulator, examples, etc.
     * this code with examples shows how to format everything for LEDScape
+=== Patches/Fixes/Gotchas ===
+  * LEDScape (at least the Geocene version of it) uses 100% CPU
+    * the issue is the DMX-over-network protocol is failing. If not using DMX then remove it
+      * comment out around line 723 of ''opc-server.c'': ''pthread_create(&g_threads.e131_server_thread.handle, NULL, e131_server_thread, NULL);''
+  * LEDScape is throwing kernel warnings in the terminal
+    * mute the warnings with edits to ''/etc/rsyslog.conf''
+      * add above the ''modules'' section of the file (toward the beginning): ''kern.=warning :omfile:/dev/null''
+      * comment out at the end of the file: ''*.emerg                         :omusrmsg:*''
+      * ''sudo systemctl restart rsyslog''
+      * //change survives reboot//
+  * for some reason ''mpg123-jack'' segfaults (most, not all the time) when LEDScape is running. Other JACK clients and the JACK server seem OK.
+  * even when the # of strands is 1, it seems many of the pins in the P8 header are not usable when LEDScape/opc-server is running. An exception is GPIO 61 which seems to work fine regardless.
 ==== Connecting ====
@@ Line 45: / Line 58: @@
 //using Amazon special//
   * ''amixer -c 1 -- sset Headphone Playback 100%''
+or
+  * ''amixer -c 1 -- sset Speaker 100%'' (for the one that has no cables)
 ===== Setting static IP for ethernet =====
@@ Line 50: / Line 65: @@
   * so the perhaps incorrect but easy way to get internet with static IP is on the beagle:
     * get name of connection: ''connmanctl services'' You'll get a response that will have something like: ''ethernet_6cecebabbc6a_cable''
-    * then assign your static IP. Example:
+    * then assign your static IP. This will be a persistent setting. Example:
 <code>
 sudo connmanctl config ethernet_6cecebabbc6a_cable --ipv4 manual 10.42.0.2 255.255.255.0 10.42.0.1 --nameservers 8.8.8.8 1.1.1.1
 </code>
+//for the morbidly curious you can find (and maybe edit?) the settings connman is reading/writing at ''/var/lib/connman'' //
-===== Always booting from SD card =====
+===== Network tips =====
-Things to try:
+//see [[https://gist.github.com/kylemanna/6930087|Connmanctl Cheat Sheet]] for connecting Wi-Fi card//
-  * [[https://stackoverflow.com/questions/40782403/searching-for-the-mlo-file-on-the-beaglebone-black|delete MLO]]
-  * or maybe edit ''uEnv.txt''
-    * [[https://gist.github.com/elfgoh/92c9c2f64dd3eaa7e515e0136d26f9ca|random gist of uEnv.txt]]
-  * [[https://groups.google.com/g/beagleboard/c/ajLAHk3-S60?pli=1|ancient conversation about this with possible tips]]
+===== Always booting from SD card =====
+  - Manually boot from the MicroSD (hold down the ''user/boot'' button).
+  - run ''sudo dd if=/dev/zero of=/dev/mmcblk1 bs=1M count=1'' to write zeros over the first 1MB of the eMMC
+  - run ''sync''
+  - run ''sudo shutdown now''
+  - disconnect and then reconnect power
+[[https://github.com/phillipdavidstearns/brahman-ai/tree/master/guides/beaglebone#towards-booting-from-microsd-always|source]]