What happens if you remove the scanner, and plug it in again?

Best Regards
Ulf Samuelsson


20 nov 2013 kl. 17:56 skrev Philippe Laurent <p...@ideos.com>:

> Ulf, many thanks for the mention. If I hit the last brick wall, I'll hire you 
> to make the fix available.
> 
> Meanwhile, some interesting developments. Curious about the grounding 
> conversation, I removed the BBB from the metal case in which it was enclosed, 
> and placed it on a non-conductive mat. Powered it on with the scanner 
> attached, and it works as it should. BUT, I have not had the Babble Interrupt 
> issue again. Even handling the bare board, the USB wire, the scanner, all of 
> which might have triggered the interrupt before, the scanner continues to 
> work. After 2 days, and still no interruption, I power-cycled the BBB, and 
> again, it has run perfectly with no interruptions for another 2 days, even 
> with the continued attempts to cause the interrupts to occur. By now, I would 
> have had easily a dozen Babble Interrupts with the metal case.
> 
> I'm going to restore the ondemand startup script and power control settings 
> to 'normal' and continue testing.
> 
> On Saturday, November 16, 2013 12:39:56 AM UTC-5, Ulf Samuelsson wrote:
> Den lördagen den 31:e augusti 2013 kl. 17:42:09 UTC+2 skrev jez...@gmail.com: 
> > I'm using my Beaglebone Black with a USB temperature sensor. It works very 
> > well, however I noticed monitoring stopped last night after roughly 35 days 
> > uptime. This morning I looked more closely into the log file and noticed: 
> > 
> > 
> > kernel: [2892926.929555] CAUTION: musb: Babble Interrupt Occurred 
> > 
> > 
> > 
> > I wasn't able to successfully reset the USB device and before I was able to 
> > restart the BBB stopped responding. I power-cycled it and it was back to 
> > normal again. Any ideas what caused this kernel message? 
> 
> Work as an independent linux consultant, and I think I can fix this problem. 
> Offered TI to do this, but they said it would be fixed in 3.12, so no 
> interest. 
> Well, 3.12 is here and no fix as far as I can see in the code. 
> I estimate 2 days work to fix with testing. 
> 
> /ulf 
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