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1  General Category / General Discussion / Re: Audio & The Sheevaplug on: January 08, 2011, 02:25:28 PM
The cheaper usb dongles should have no problems with the usb-audio module.  Newer chipsets often do things differently and don't work well until someone patches the driver.
2  Hardware and U-Boot firmware / Hardware / Re: Dead Plug? on: January 08, 2011, 12:59:54 PM
I have the exact same thing. No blue light comes on, green power light is on steady, both ethernet lights are on steady, reset switch does nothing, cannot access serial. Interesting things I found, the battery inside was corroded and bulged, oviously needs a new battary, can this cause issues if I don't run with one of these? I took it out for the moment, no different. Also I measured the voltage of the power supply, was 3v coming out, I think I may have bad power supply, since shouldn't it be 5v? comments anyone? PS looks good, no bad smells, looks like there may be a buldged cap just a little, hard to tell. But I suspect with the voltages I measured, that it is bad. Will have to get something to test it out.

If its a bulging capacitor, you can bet money its bad.


Capacitors shown are from left to right: 1) 400V, 6.8uF, 2) 400V 22uF, 3) 1000uF, 10V.... The one of the right is the most critical and exposed to the most heat and is likely to go first.
3  General Category / General Discussion / Re: Spam and new Users on: December 29, 2010, 04:11:07 AM
Wow flooded this morning!

When I ran a forum, I found the spam bots were targeting known script filenames.  Simply going through the php scripts and changing the filenames was enough to break their scripts 100%.  I had to search each php script for invocations of the modified account and posting script names.  The spam scripts are written to target thousands of sites.  I bet if each site were modified slightly, forum spam would cease to exist.

The spam script most likely searched for the string "Powered by SMF 1.1.8 | SMF 2006-2008, Simple Machines LLC" at the bottom of the page and added this site to their list sent out to botnets.
4  General Category / General Discussion / Re: Dropbox for LinuxARM. on: December 28, 2010, 12:44:00 AM
hmmmm...

http://forums.dropbox.com/topic.php?id=17384&replies=24#post-157020
5  Linux Stuff / General Linux questions / Re: How to deal with a corrupted tun.ko in Gruruplug server? on: December 26, 2010, 03:47:06 AM
Hi everybody, Merry Xmas to you all.
I've recently received my Guruplug server. Managed to get the server to boot from SD card and installed Transmission and NZBGet. This all works smoothly. However, being a newbie on Linux, I corrupted my tun.ko module while attempting to install Openvpn. Is there any way to get a new tun.ko without performing more than newbie level Linux magic? I've searched the internet and copied tun.ko's but nothing works.
please help



That sounds like a linux kernel module.  You may get it by recompiling the kernel modules by source or reinstalling the kernel modules themselves.  The modules are usually found in the installation tree if you want to untar and copy it over.
6  Hardware and U-Boot firmware / Hardware / Re: Poll: Sheeva Plug Power Supply failures - does the mains voltage matter? on: December 26, 2010, 12:48:56 AM
Thanks, dattaway!  One more question:  I have a blown PS that a friend gave me that has some of the capacitors removed.  What is the value of the small electrolytic that is just to the right of the marking "400V 22uF" in your picture?  It's between the 2nd and 3rd one that you suggest replacing.  That one was removed and lost and I'd like to see if I can resurrect this PS.

Unfortunately, I would have to take apart my running server which is hosting that picture to find out!  I did see from another picture on the internet and could make out a 22uF:

http://www.ronketti.org.uk/toasty.jpg

Not sure of the voltage, but it is on the high voltage side.  Might be 400 volts.  A higher voltage capacitor might be bigger, but will work fine.
7  Hardware and U-Boot firmware / Hardware / Re: Poll: Sheeva Plug Power Supply failures - does the mains voltage matter? on: December 23, 2010, 05:45:06 AM
I believe you are essentially correct, Norbert.  I think 5V/2A is all that is theoretically needed, but 3A would give you a bit more of a safety margin, and is what I would prefer.  Just remember:  Red is +, Black is -.

With all the SheevaPlug power supplies that have failed, has anyone cataloged the components (capacitors) that tend to go bad?  My Sheeva is still running on its original PS, and as a preventative measure, I would not mind preemptively replacing the two or three caps that are prone to fail.  Anyone care to make a list?



From left to right: 1) 400V, 6.8uF, 2) 400V 22uF, 3) 1000uF, 10V....

Since these are filtering capacitors, substitutions can be made if the rated voltage exceeds the original.

edit: the one on the right is the most likely to fail.  When it vents, its capacitance drops to almost nothing.
8  Linux Stuff / Linux distributions / Re: help me please.. on: November 17, 2010, 01:44:42 AM
Looks like the root partition may have been installed in another location, such as the sdcard.
9  Hardware and U-Boot firmware / Hardware / Re: Poll: What is the status of your SheevaPlug's Power Supply? on: November 13, 2010, 05:46:39 AM
Changed my vote, but really needed an option "replaced capacitors in a power supply that overheated, because it was wrapped around too many layers of covers and insulation."

Had great uptime until it started rebooting frequently on its own.  Now with a simple vent mod, it should last a lifetime.
10  General Category / General Discussion / Re: Source Code on: September 30, 2010, 07:11:57 PM
An easy to find tarball of the source and configs would be mighty nice.
11  Hardware and U-Boot firmware / Hardware / Re: bricked plug, power unit fine, what else to try? on: September 28, 2010, 08:57:29 AM
The best way to check the voltage from the power supply is with an oscilloscope.  A meter doesn't always catch tiny voltage spikes from a bad capacitor.
12  Hardware and U-Boot firmware / Hardware / Re: Plug computer with FPU? on: September 28, 2010, 08:50:39 AM
There is the fft-arm project, which appears to have died.

And there's the RVDS toolkit from ARM, which is $$$$$$$.
13  Hardware and U-Boot firmware / Hardware / Re: Poll: Sheeva Plug Power Supply failures - does the mains voltage matter? on: September 28, 2010, 12:56:33 AM
120 volts and one year.  The final output capacitor jetted its oil onto the board.  1000uF.  Replaced and its good as new. 

I also replaced the other two large capacitors since I had them.  But I added extra ventilation to keep the heat from destroying it again.
14  Hardware and U-Boot firmware / Hardware / Re: How to power SheevaPlug with AA batteries? on: September 24, 2010, 11:36:05 PM
Some things to consider: 1) AA batteries have poor energy capacity.  If they held 1000mAhr, your Sheeva would last one hour.  2) AA batteries are unregulated.  Four AA's will give 6 volts.  Sheeva's likes 5 volts.  Will it boot?  Will it survive?  Will things attatched to the Sheeva's USB bus burst in flames?  3) USB power supplies average about 500mA.  The Sheeva really wants 4-5 times much that current on tap.  Too little current will trip the reset line and reboot.  4) Use the old power suppy connector as your guide.  Red positve, black negative.

But if you are going through all that trouble, I would just replace the toasted capacitor.  Mine tried to explode and got fat, so it was easy to see without testing.
15  Hardware and U-Boot firmware / Hardware / Re: I fixed my Sheeva's power supply (pics, howto) on: September 24, 2010, 11:18:29 PM


Here's a picture of the old 1000uF blowout.  The safety vent on top failed and almost launched like a rocket.
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