<?xml version="1.0" encoding="UTF-8"?><rss xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:atom="http://www.w3.org/2005/Atom" version="2.0"><channel><title><![CDATA[dsp is not running]]></title><description><![CDATA[<p dir="auto">Hi,</p>
<p dir="auto">this is my dev drone info.<br />
after working with it quite a bit it started to fail with power issues in prefight. later I noticed battery level is not available. and learned that the dsp is not working good after boot.<br />
I have another drone with same FW there is no problem. can I somehow fix this issue. see below some information.</p>
<p dir="auto">Thanks,</p>
<p dir="auto">Roy</p>
<p dir="auto">────────────────────────────────────────────────────────────────────────────────<br />
system-image: 1.8.06-M0054-14.1a-perf<br />
kernel:       #1 SMP PREEMPT Wed Oct 22 04:29:38 UTC 2025 4.19.125<br />
────────────────────────────────────────────────────────────────────────────────<br />
hw platform:  M0054<br />
mach.var:     1.2.1<br />
SKU:          MRB-D0012-4-V3-C28-T8-M36-X0<br />
────────────────────────────────────────────────────────────────────────────────<br />
voxl-suite:   1.6.4~alpha2<br />
────────────────────────────────────────────────────────────────────────────────</p>
<p dir="auto">Symptom</p>
<pre><code>  After a session of repeated power-cycles/reboots (while troubleshooting unrelated Wi‑Fi/adb and flight-mode params), PX4 stopped functioning. The apps-side voxl-px4 launcher runs stably (NRestarts=0,
  stable PID), but no PX4 flight modules run — commander reports not running, battery_status is never published, preflight checks can't run, and voxl-px4 -s hangs.

  Root cause observed

  The journal shows the apps↔DSP bridge is dead:
  ERROR [muorb] Keep alive timeout from DSP: ~1009000 ms
  repeating continuously. So the SLPI/DSP-side of PX4 isn't responding — everything that runs on the DSP (commander, sensors, ekf2, battery) is absent.

  What we ruled out

  - SLPI hardware/firmware is healthy — dmesg shows the subsystem loads fine: slpi: Brought out of reset, Power/Clock ready interrupt received, adsprpc: slpi subsystem is up, opened rpmsg channel for slpi.
  FastRPC to the DSP is up.
  - Not a version mismatch — /usr/bin/px4 and /usr/lib/rfsa/adsp/libpx4.so are the same build (both Mar 24 2026), and this exact build flew successfully earlier in the same session.
  - Not the apps side — apps launcher runs stably, no crash loop.

  Recovery attempts that did NOT work

  - systemctl restart voxl-px4 (restarts only the apps-side launcher)
  - voxl-reset-slpi -t 5000 (DSP "recovered after 800ms" but PX4-on-DSP still didn't come up)
  - Manual px4-commander start — "succeeds" on the apps side but nothing actually executes on the DSP
  - A warm/adb reboot — fresh boot (uptime ~6 min, new PID) but commander still absent

  Question for ModalAI

  Why does libpx4.so fail to start/communicate on a healthy SLPI (FastRPC channel open, subsystem up) when the apps-side launcher and the DSP .so are the same build that worked earlier? Is this a known
  FastRPC/qurt PD-restart state that survives voxl-reset-slpi and a warm reboot, and is the recommended recovery a full cold power-cycle and/or a voxl-px4 reinstall to restore the signed/known-good
  libpx4.so?
</code></pre>
]]></description><link>https://forum.modalai.com/topic/5274/dsp-is-not-running</link><generator>RSS for Node</generator><lastBuildDate>Sat, 20 Jun 2026 07:50:17 GMT</lastBuildDate><atom:link href="https://forum.modalai.com/topic/5274.rss" rel="self" type="application/rss+xml"/><pubDate>Thu, 18 Jun 2026 13:23:50 GMT</pubDate><ttl>60</ttl><item><title><![CDATA[Reply to dsp is not running on Fri, 19 Jun 2026 02:45:54 GMT]]></title><description><![CDATA[<p dir="auto"><a class="plugin-mentions-user plugin-mentions-a" href="https://forum.modalai.com/uid/3669">@RoyAzriel</a> I'm guessing that there is a version mismatch somewhere. Can you install a recent SDK from scratch and see if everything comes up fine? And when you say "dev crone" do you mean that this is a custom drone and not one of our products?</p>
]]></description><link>https://forum.modalai.com/post/26186</link><guid isPermaLink="true">https://forum.modalai.com/post/26186</guid><dc:creator><![CDATA[Eric Katzfey]]></dc:creator><pubDate>Fri, 19 Jun 2026 02:45:54 GMT</pubDate></item><item><title><![CDATA[Reply to dsp is not running on Fri, 19 Jun 2026 02:30:45 GMT]]></title><description><![CDATA[<p dir="auto"><a class="plugin-mentions-user plugin-mentions-a" href="https://forum.modalai.com/uid/3669">@RoyAzriel</a> no.</p>
]]></description><link>https://forum.modalai.com/post/26185</link><guid isPermaLink="true">https://forum.modalai.com/post/26185</guid><dc:creator><![CDATA[RoyAzriel]]></dc:creator><pubDate>Fri, 19 Jun 2026 02:30:45 GMT</pubDate></item><item><title><![CDATA[Reply to dsp is not running on Thu, 18 Jun 2026 15:31:41 GMT]]></title><description><![CDATA[<p dir="auto"><a class="plugin-mentions-user plugin-mentions-a" href="https://forum.modalai.com/uid/3669">@RoyAzriel</a> Does it come up fine after a power cycle?</p>
]]></description><link>https://forum.modalai.com/post/26178</link><guid isPermaLink="true">https://forum.modalai.com/post/26178</guid><dc:creator><![CDATA[Eric Katzfey]]></dc:creator><pubDate>Thu, 18 Jun 2026 15:31:41 GMT</pubDate></item></channel></rss>