On Tuesday, November 5, 2013 10:32:10 AM UTC-8, [email protected] 
wrote:
>
> Hi, I'm using several BBB, but one started failing to boot, and now is not 
> booting at all. I used 3 different power supplies, and tried to power it by 
> the usb, but I always get a Kernel panic (reading the debug port). I tried 
> with the already running custom emmc, also with an SD card with a custom 
> image (which works fine in my others BBB) and with an SD card with 
> BBB-eMMC-flasher-2013.06.20.img. 
>

My U-Boot shows the same messages as your third scenario, except "leds.7" 
instead of "leds.8". I see lots of people with those "leds" issues, and 
they don't seem to be fatal. The real error is a bit later in time, too:
-----
[    0.451511] bone-capemgr bone_capemgr.8: loader: failed to load slot-6 
BB-BONELT-HDMIN:00A0 (prio 2)
[    0.517828] pinctrl-single 44e10800.pinmux: pin 44e10854 already 
requested by 44e10800.pinmux; cannot claim for gpio-leds.7
[    0.529535] pinctrl-single 44e10800.pinmux: pin-21 (gpio-leds.7) status 
-22
[    0.536848] pinctrl-single 44e10800.pinmux: could not request pin 21 on 
device pinctrl-single
[    0.766327] Unhandled fault: external abort on non-linefetch (0x1008) at 
0xe09fe000
[    0.774345] Internal error: : 1008 [#1] SMP THUMB2
[    0.779350] Modules linked in:
-----

I have the default eMMC, and supposedly the same image on a uSD card, and 
they both show the same error. 

This is my first BBB, and it only worked for a couple of hours. Was going 
great, had the USB network running, with SSH and VNC over it. Decided to 
try the RaLink UWN100 Wi-Fi adapter I bought for it. Google found me the 
tutorial at
<
https://docs.google.com/document/d/1-CIGQYdk8ZhU3D3UCNn70jc7C9HdXvEZAsiNW71fGIE/edit?pli=1#>
and I thought it worked. I saw:
-----
ra0       Link encap:Ethernet  HWaddr 00:0C:43:00:7D:7F
        UP BROADCAST MULTICAST  MTU:1500  Metric:1
        RX packets:5506 errors:0 dropped:0 overruns:0 frame:0
        TX packets:84 errors:0 dropped:0 overruns:0 carrier:0
        collisions:0 txqueuelen:1000
        RX bytes:534942 (522.4 KiB)  TX bytes:23184 (22.6 KiB)
-----

I disconnected the wired ethernet, but it didn't switch its IP address to 
the Wi-Fi. So I tried the "systemctl restart connman.service" command the 
tutorial suggested, but it didn't help. Thinking maybe it was preferring 
the USB connection, like it apparently does the wired connection, I 
connected 5V power to the jack, and disconnected USB. 

I'm not sure whether it ever booted properly after the connman command. It 
continued to run after the command, but when I tried to restart it without 
the USB connection it failed to start. There was a problem with the first 
power supply I tried, its voltage sagged too much to boot properly, so that 
could be a factor, too, but I think the tps65217c Power chip should have 
handled that gracefully. 

So my BBB is about as stock as they come, I've added the level converter 
for the console output, and plugged in the uSD card and the Wi-Fi adapter - 
all of them seemed to work. Guess I'll keep searching for clues. 

Have you found any? 

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