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Old 07-23-2014, 01:46 PM   #1
ar1234mo
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Registered: Jun 2014
Posts: 7

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Ubuntu 12.04 fresh install authentication failure


I have 4 ARM v7 board by compulab called trimslice.They provide a patched kernel and Ubuntu 12.04 for this device.I installed on three devices it worked perfect but on my fourth device when I try to login it gives authentication failure.I thought that i might have misspelled the password so I again reinstalled it with caution but the same result.I have tried the following option but no one works.Can someone provide any help
1.I have a live disk so chrooted to the hard disk in the system and did passwd XXXX. It is successful but when I reboot from the hard disk again authentication fails

2.I thought that the disk might be corrupted so did a e2fsck which returned with no problem also to be sure I did a mkfs.ext2 on the disk and reinstalled it gave the same error.

3.As a last try I took a usb drive and installed the OS in that pen drive.and tried booting with that pen drive ,again the same error.

the same disk SD card which I am using works perfectly with other trimslice(Even with this one on a previous occasion).I have alsodid format the sd card over write the whole sd card with zero and again burned the image on it still the same result.

Would be thankful if anyone can help
 
Old 07-24-2014, 11:11 AM   #2
ar1234mo
LQ Newbie
 
Registered: Jun 2014
Posts: 7

Original Poster
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Reading about authentication failures I came about that improper syncing of the clock might be a problem.I can chrot into my Haddisk. Can anyone suggest how to sync up the clocks while chrooted

NTP is not installed and apt-get doesnot work saying that /dev/null cannot be written.Also hwclock tells that /dev/rtc doesnot exist.I am pretty sure it was enabled in config file.
will appreciate any help
 
Old 07-24-2014, 12:03 PM   #3
ar1234mo
LQ Newbie
 
Registered: Jun 2014
Posts: 7

Original Poster
Rep: Reputation: Disabled
I solved it.It was a problem for the clocks.I did
hwclock --systohc --localtime and that did sync up the local time with hardware time and I could log in.If some one can shed some light how authentication and time are related ?

I am marking the thread as solved
 
  


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