Hello
I’ve tried to install UBUNTU using this link. After it, led D14 stoped working. I’ve looked in the manual and I can see that indeed led D14 is the USB power indicator, and it recieves it’s power from U16, a TL1963A LDO(page 78).
The LDO is controlled by the TPS65950, which communicates with the proccessor using I2C, By default, the LDO is turned off.
For some reason I have no USB power (ledD14 is always off).
someone have an idea how to turn it on again?
Ohad
So...
Which Board revision?
How are you powering the Board? (5Volt DC Plug or OTG cable)
Regards,
Beagleboard Xm revision C, external 5v power supply.
No idea off hand... Works For Me..
To debug add "--serial-mode" to the "./mk_mmc.sh" script and use
cutecom or any serial terminal that actually logs serial data... Post
it on pastebin.com and i'll take a look at it..
Regards,
Hello Robert, thank you for your response.
in here you can find the output from the mounting command:
sudo ./mk_mmc.sh --mmc /dev/sdb --uboot beagle_xm --distro precise-armhf --serial-mode
I start the installation and then I got this, which makes sense since usb has no power (hence no Ethernet). and than, no nothing. that’s it…
I’ve done this twice, on two different BeagleboardXM revC, happened on both. I though maybe it was the power supply but it is a standard 5v supply, and if the was a problem with the power, there is a protection circuit at the entrance, with red led indicating bad power supply (I did RTFM) .
Help would be highly apreciated…
-Ohad-
Hello Robert, thank you for your response.
in here you can find the output from the mounting command:
sudo ./mk_mmc.sh --mmc /dev/sdb --uboot beagle_xm --distro precise-armhf
--serial-modeI start the installation and then I got this, which makes sense since usb
has no power (hence no Ethernet). and than, no nothing. that's it...
Yeah, ^^^ this is why you need to use a serial terminal with
logging... I'm looking for any out of the ordinary kernel messages on
bootup... (basicly i'd like to see all the serial message before the
"netinstall" takes over..)
I've done this twice, on two different BeagleboardXM revC, happened on both.
I though maybe it was the power supply but it is a standard 5v supply, and
if the was a problem with the power, there is a protection circuit at the
entrance, with red led indicating bad power supply (I did RTFM) .
Help would be highly apreciated...
Is it a 2Amp+ supply?
Regards,
Found the problem (dont know how to fix, yet) - from the manual:
Also new in the REV C is the fact that the USB 5V defaults to off, making sure that the
voltage is not connected to the USB power FET. We were seeing a small number of
boards that still had this device sustaining damage. This was the reason for the circuit
design change. Having this default to off provides an additional level of protection.
How can it be that I’m the only one encountering such problem?(!!!)
I’ve double checked in the appropriate test point and indeed, no 5V to the USB.
How do I enable it?
-Ohad-
Yours:
[ 5.631652] sdhci: Copyright(c) Pierre Ossman
[ 5.710876] hub 1-0:1.0: unable to enumerate USB device on port 2
Mine:
[ 4.056335] sdhci: Copyright(c) Pierre Ossman
[ 4.197021] usb 1-2: new high-speed USB device number 2 using ehci-omap
So it's defiantly not responding..
Does the board work with the Factory 4-25 image?
from:
http://circuitco.com/support/index.php?title=BeagleBoard-xM#BeagleBoard-xM_Rev_C_Image
Regards,
Nope.
Tried 3-30 and 4-25.
Simple.. Like i asked previously... Are you powering the board via the
5Volt DC or via the otg/usb..
If your using the actuall 5Volt DC plug, the smsc hub is powerd... If
your powering via the otg/usb, it's disabled...
So, asking again.. Are you powering the board via the 5Volt DC or via otg/usb?
Regards,
I’m quite sure.
Well, since ^^ that should work with "3-30 and 4-25"...
do: http://beagleboard.org/support/rma/
to see if they can repair the board...
Regards,
This may be a sill question because the green LED is on, but is the
supply the correct polarity within the barrel connector?
If it was reversed, the core wouldn't even come up as the protection
diodes would be trying to stop the voltage inrush, and therefore we
wouldn't get any data over the serial port...
Regards,
Thus it was silly... O well good luck
But it could ruin the boards pretty quickly... Specially on the Beagle Classic..
Regards,
I’m sure it is just a small command to re-enable the USB…
Thank you for your time and effort!
-Ohad-
Not really, as it's a discrete switch... You'd have to put the magic
smoke back into the ic..
Regards,
Well I thought it was a hardware problem but it happened to me on 2(two) beagleboards - after doing exactly same thing*!!
- I know it sounds stupid - why to do all over again something that messed up the first beagleboard? well I didn’t (and I still don’t ) think that installing Ubuntu will mess up the board. I though maybe it was something I accidentally did (removing power to fast / power spike / removing SD, etc) or bad BB hardware. This is why when I got the 2nd one, I handled it will silk gloves and was surprised that it happened again…
Bad karma?