[yocto] Hanging during kernel boot

Paul D. DeRocco pderocco at ix.netcom.com
Tue Sep 15 18:01:13 PDT 2015


I've been redoing an old Danny project with Fido, running on an Atom mobo.
I created a fresh BSP with yocto-bsp, using a RT kernel, and haven't begun
to fiddle with the kernel configuration yet. It gets part way through the
boot process and hangs at "Switching to clocksource tsc". I've googled
this error, which lots of people have had on lots of systems (Ubuntu,
etc.), and have solved in lots of different ways, none of which seem to
relate to my system. I don't believe it has anything to do with the tsc.

The system doesn't crash. I can bang on the keyboard, and the keys are
echoed. After seven or so presses, I get a "random: nonblocking pool is
initialized" message (something to do with entropy collection, I guess).
So the kernel is running, but it's like systemd (which I've substituted
for sysvinit) has just hung.

Since I haven't gotten to a prompt, I can't do anything. Does anyone have
any ideas how I might diagnose this? Are there any kernel parameters I
might fiddle with on the flash memory? And where does one do such
fiddling, with a syslinux-based live image? Or should I be selectively
removing things from my BSP that were put there by yocto-bsp?

-- 

Ciao,               Paul D. DeRocco
Paul                mailto:pderocco at ix.netcom.com 




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