Cannot boot after a system freeze...

Second sentence should read ...(it would NOT respond to keyboard or mouse.) My bad :S

Boot from Ubuntu live cd:
1) - perform a filesystem check on your Ubuntu hard-disk partitions
2) - be sure (still using Ubuntu live) to perform a full RAM memory test there is a boot menu item to do it.

MemCheck now reporting 100%, but system not letting me do a filesystem check (unable to log in as su, password not recognised.) Suggestions appreciated. (Error messages on recovery mode now showing 'Plymouth not found' or similar, 'Segmentation error' and 'Kernel panic,' in case these help. Also the browser (Firefox) seems to be the most unstable element in Live CD sessions, so I'm trying Midori as an alternative.)

This question was expired because it remained in the 'Open' state without activity for the last 15 days.

Still ongoing: Disk Utility shows the disk is 'clean'; I am currently trying to burn a good copy of 11.10 to try another install, keeping my current files, but my old PC is not doing a very good job of it (I have done an MD5sum on the .iso, so I am fairly confident it is not the original file that is corrupt.) At this rate we will be in to 12.04 before I get things sorted - help, please.

Mark _\\//

-----Original Message-----
From: Launchpad Janitor <email address hidden>
To: Peripatetic <email address hidden>
Sent: Sun, 8 Apr 2012 10:06
Subject: Re: [Question #190570]: Cannot boot after a system freeze...

Your question #190570 on linux in Ubuntu changed:
https://answers.launchpad.net/ubuntu/+source/linux/+question/190570

    Status: Open => Expired

Launchpad Janitor expired the question:
This question was expired because it remained in the 'Open' state
without activity for the last 15 days.

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This question was expired because it remained in the 'Open' state without activity for the last 15 days.

Still ongoing, any help welcome

Did you tried to boot in recovery mode and then run filesystem check?

Yes, please read #3 and #5 above - I've used Disk Utility to run a filesystem check (CLEAN) and run the full MemCheck under Grub, which was reporting 100%; any other methods of running these checks will be attempted with gratitude, or any other checks/fixes that are suggested (as mentioned, all Data is intact although files created on another system through Windows do not have 'permission' to be viewed on the Ubuntu machine or are locked.)

Hi Mark , seems like the issue is related to the login manager .. so in recovery mode try switching logins manager

sudo dpkg-reconfigure lightdm

selected gdm instead of lightdm

and see how it goes .

To recover your password , from recovery mode select the option : root - Drop to root shell prompt

In recent versions of Ubuntu, the filesystem is mounted as read-only, so you need to enter the follow command to get it to remount as read-write, which will allow you to make changes , so type

mount -o rw,remount /

to see your username .. type

ls /home

To reset the password, type

passwd username

where username is the username you want to reset. so if its mark , then type ..

passwd mark
You'll then be prompted for a new password. When you type the password you will get no visual response acknowledging your typing. Your password is still being accepted. Just type the password and hit Enter when you're done. You'll be prompted to retype the password. Do so and hit Enter again.

Now the password should be reset. Type ..

exit

to return to the recovery menu ,then After you get back to the recovery menu, select resume normal boot, and use Ubuntu as you normally.

hope this helps , for more assistance mark .. please drop to the #Ubuntu IRC support channel on freenode IRC Network using either the web interface webchat.freenode.net/ .. Javascript is required to use IRC

or from your favorite IRC client .. /connect chat.freenode.net .. then /join #ubuntu

# See http://www.ubuntu.com/support

See you soon .

Sary

I forgot to ask , did this occur after an u[date / upgrade ?!

if so , probable better to resume any update / upgrade process ..

So , switch to a real console (tty1) by pressing Ctrl+Alt+F1 .. login with your username and password then run the following commands :

sudo apt-get update

sudo apt-get autoclean

sudo apt-get clean

sudo apt-get autoremove

sudo apt-get update

sudo dpkg -reconfigure -a

sudo apt-get --fix-missing install

sudo apt-get upgrade && sudo apt-get dist-upgrade