U3 won't boot after restart !

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U3 won't boot after restart !

Unread postby fOmey » Tue Feb 06, 2018 5:26 pm

I restarted my U3, for some reason it refuses to reboot... it turns on it splashes some boot debug text and it turns off again within a few seconds.

Can't make out what the boot text says.

I tried to pull the logs off the card, however I can't find any recent relevant logs.

I've tried flashing the Ubuntu 14.04.2 image firmware, same issue... tried flashing Ubuntu 14.04. image on a microsd card also, same issue.

I'm out of ideas...
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Re: U3 won't boot after restart !

Unread postby bloody_noob » Wed Feb 07, 2018 7:01 am

Are you by chance using the ondemand governor?
Code: Select all
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor;

If so set the governor to performance before rebooting:
Code: Select all
echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor;


To automate things (only do this if rebooting with performance governor is working):
/opt/reboot.sh
Code: Select all
#!/bin/bash
echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor;
sleep 1;
$(which reboot);

/etc/profile
# below last line: fix reboot issue due to governor
alias reboot='/opt/reboot.sh'

Code: Select all
 source /etc/profile
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Re: U3 won't boot after restart !

Unread postby fOmey » Wed Feb 07, 2018 7:10 am

@bloody_noob, U3 doesnt stay on long enough to input any commands...

Turns on for a second and powers off.
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Re: U3 won't boot after restart !

Unread postby meveric » Wed Feb 07, 2018 7:15 am

are you sure you have the correct PSU?
Sounds like the power might fail at some point in the boot process.

Also please use Ubuntu 16.04 image, as 14.04 is no longer supported by HardKernel.
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Re: U3 won't boot after restart !

Unread postby fOmey » Wed Feb 07, 2018 7:25 am

Been using the same PSU since 2014.. never had any problems until now..

I uploaded a video of what is happening: https://youtu.be/uXFuZnC4T0A
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Re: U3 won't boot after restart !

Unread postby meveric » Wed Feb 07, 2018 7:35 am

i had a few PSU that actually broke down after a while. So it's not impossible for a PSU to fail.
The fact that it still boots "for a little while" seems to indicate the board itself is not dead (yet).
Either you have a failing PSU (which is rather easy to replace) or some components on the board might be damaged (like a capacitor) which may cause this behavior.
I for my taste would prefer a broken PSU ;)
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Re: U3 won't boot after restart !

Unread postby fOmey » Wed Feb 07, 2018 7:41 am

Aw I hope jut a PSU issue.. I will test the PSU with a multimeter when I get home from work today, no idea why I didn't think of doing that yesterday.

I will inspect the board for any capacitor leakage, however I didn't notice anything obvious yesterday.

U3 has served me very well over the years.. I really hope it continues to kick on!

Perhaps time for a upgrade.. Any coupon codes for repeat customers ? :D
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Re: U3 won't boot after restart !

Unread postby fOmey » Wed Feb 07, 2018 2:39 pm

@meveric, doesnt seem to be a PSU issue... tested the PSU getting a solid 5v's.

Perhaps someone can decrypt these LED's ? I'm thinking it's displaying some sort of error code: https://youtu.be/Jy3LFLxvxkY
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Re: U3 won't boot after restart !

Unread postby moon.linux » Wed Feb 07, 2018 3:00 pm

@fOmey
Please try Odroid u2/u3 image https://odroid.in/ubuntu_16.04lts/ubunt ... 920.img.xz
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Re: U3 won't boot after restart !

Unread postby fOmey » Wed Feb 07, 2018 3:02 pm

Thanks moon, I'll give it a try now.
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Re: U3 won't boot after restart !

Unread postby fOmey » Wed Feb 07, 2018 3:25 pm

@moon.linux Unfortunately same issue... think my U3 is dead..

EDIT: I tried it both on the EMMC and a brand new microsd.
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Re: U3 won't boot after restart !

Unread postby odroid » Wed Feb 07, 2018 3:44 pm

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Re: U3 won't boot after restart !

Unread postby fOmey » Wed Feb 07, 2018 3:54 pm

I did not, I used disk imager.

I will try etcher using the brand new microsd for safe measure.

EDIT: Same issue... lets take a moment silence for my U3, its served me well over the years..
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Re: U3 won't boot after restart !

Unread postby odroid » Wed Feb 07, 2018 4:29 pm

Too sad~~
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