2013-11-20 22:15, Philippe Laurent skrev:
The scanner does not power back on if disconnected. The BBB has to be
power cycled before the scanner is usable.
The relevant DMESG entries are below:
[15104.176465] hub 1-0:1.0: state 7 ports 1 chg 0000 evt 0002
[15104.176536] hub 1-0:1.0: port 1, status 0100, change 0001, 12 Mb/s
[15104.176555] usb 1-1: USB disconnect, device number 2
[15104.176566] usb 1-1: unregistering device
[15104.176579] usb 1-1: unregistering interface 1-1:1.0
[15104.176809] musb-hdrc musb-hdrc.1.auto: shutdown urb df5da6c0
ep1in-intr
[15104.177785] usb 1-1: usb_disable_device nuking all URBs
[15104.290606] hub 1-0:1.0: debounce: port 1: total 100ms stable 100ms
status 0x100
[15104.290694] hub 1-0:1.0: hub_suspend
[15104.290724] usb usb1: bus auto-suspend, wakeup 1
So you have to make sure that you are never disconnected due to noise.
But you didnt get the dabble interrupt, right?
If not, then there are two problems.
BR
Ulf
On Wed, Nov 20, 2013 at 1:13 PM, Ulf Samuelsson <[email protected]
<mailto:[email protected]>> wrote:
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 <[email protected]
<mailto:[email protected]>>:
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
[email protected]:
> 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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Ulf Samuelsson
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