Author Topic: Ubuntu.. missing after upgrade!!  (Read 2524 times)

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Offline SneakyTommy

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Re: Ubuntu.. missing after upgrade!!
« Reply #15 on: November 01, 2016, 08:55:34 am »
I would go for what Mark has suggested. Basically get *any* liveCD distribution. It doesnt matter which one, CD or USB.
Boot into that system (liveCD) and open terminal and get the root access. You can tell that you have root privileges by having # character in terminal instead of $. You can also use 'sudo' command to execute commands as root.
for example to create a folder in /root folder you can use
Code: [Select]
sudo mkdir /root/new_folder

Basically what i mean is to boot using liveCD, then from terminal you can 'login' remotely to your existing Ubuntu system on the harddrive. From that point, because you are already as root on liveCD, you can change whatever you want in your Ubuntu system,for example changing password for root or create/delete user accounts etc.

First of all please provide us with the output from these commands Mark has posted before. i mean sudo fdisk -l and sudo blkid.
After that we can tell you step by step how to chroot into your old system. Documentation to support above (as point of interest if above doesnt really make any sense):
https://wiki.archlinux.org/index.php/change_root

Offline Mark Greaves (PCNetSpec)

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Re: Ubuntu.. missing after upgrade!!
« Reply #16 on: November 01, 2016, 07:22:36 pm »
is there another option that doesn't end with "recovery mode" in the GRUB advanced menu ?

If so, what happens if you try that ?
WARNING: You are logged into reality as 'root'
logging in as 'insane' is the only safe option.
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Offline Penndrow

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Re: Ubuntu.. missing after upgrade!!
« Reply #17 on: November 03, 2016, 03:49:34 pm »
Hi Mark.. This is the options that come up:
 (1)    Ubuntu this option just creates a blank screen which hangs
 (2) Advanced options
 (3) Memory test  (memtest 86+)
 (4) Memory test  (memtest 86+) serial console 115200
 (5) Windows recovery Enviroment
 (6) Windows 77 (loader)

 From advanced options i have the following options:

Ubuntu, with Linux 3.19.0-58 generic
Ubuntu, with Linux 3.19.0-58 generic (recovery mode)
The above messages are repeated except for 0-58 I get 0-56, 0-51, 0-49, 0-25
 If I select the first boot option line as above, my screen blanks and the laptop just hangs. If I select the same option but with recovery mode
 I get a scrolling screen of data which ends in the request for a login, which returns Login incorrect!

 I don't have the USB ubuntu boot program..it got wiped by mistake a while back.


 
« Last Edit: November 03, 2016, 04:03:41 pm by Penndrow »

Offline Mark Greaves (PCNetSpec)

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Re: Ubuntu.. missing after upgrade!!
« Reply #18 on: November 03, 2016, 07:35:18 pm »
Do you know how to add "nomodeset" to the kernel boot line in GRUB ?
WARNING: You are logged into reality as 'root'
logging in as 'insane' is the only safe option.
pcnetspec.co.uk

Offline Penndrow

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Re: Ubuntu.. missing after upgrade!!
« Reply #19 on: November 04, 2016, 07:20:41 pm »
Hi mark, thank's for comming back to me. I have no idea with respect to your question as computer technical jargo means nothing to me. However I'm willing to try if it's not likely to create any problems, otherwise can I revert back to putting back Windows 7 as the first boot option. Kind Regards

Offline Mark Greaves (PCNetSpec)

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Re: Ubuntu.. missing after upgrade!!
« Reply #20 on: November 04, 2016, 09:59:14 pm »
There's no "easy" way to change the GRUB boot order unless you can get into Ubuntu.

Boot to Ubuntu .. when you get to the blank screen, what happens if you hit Ctrl+Alt+F3
Are you presented with a text login prompt ?

If so, what happens if you log in in text mode, then run:
Code: [Select]
sudo service lightdm restart
WARNING: You are logged into reality as 'root'
logging in as 'insane' is the only safe option.
pcnetspec.co.uk

Offline Penndrow

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Re: Ubuntu.. missing after upgrade!!
« Reply #21 on: November 05, 2016, 08:57:54 am »
Hi Mark.. it makes no difference! when the login prompt appears an I enter my login, it returns with Login incorrect. Just can't get passed this point!

Offline Mark Greaves (PCNetSpec)

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Re: Ubuntu.. missing after upgrade!!
« Reply #22 on: November 05, 2016, 11:11:08 am »
Okay try following these instructions to reset your password:
http://www.psychocats.net/ubuntu/resetpassword
WARNING: You are logged into reality as 'root'
logging in as 'insane' is the only safe option.
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Offline Penndrow

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Re: Ubuntu.. missing after upgrade!!
« Reply #23 on: November 05, 2016, 07:23:06 pm »
I know what my password is but not the login!
When I hit Ubuntu I notice during the screen data as it scrolls down with green ok's, there is a red failure = (Failed to start load kernel modules) is this a clue to my problem?

Offline Mark Greaves (PCNetSpec)

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Re: Ubuntu.. missing after upgrade!!
« Reply #24 on: November 05, 2016, 11:25:32 pm »
Dunno, as it doesn't mention which module(s).

The tutorial shows you how to discover your username from the name of your home folder.

[EDIT]

Have you tried simply booting an earlier kernel from the "advanced" sub menu in GRUB ?
« Last Edit: November 05, 2016, 11:37:52 pm by Mark Greaves (PCNetSpec) »
WARNING: You are logged into reality as 'root'
logging in as 'insane' is the only safe option.
pcnetspec.co.uk

Offline Penndrow

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Re: Ubuntu.. missing after upgrade!!
« Reply #25 on: November 06, 2016, 04:33:44 pm »
I can't get the recovery menu to appear, only a request to login no matter what I try! I'll carry on with Windows 7 Ubuntu issues are beyond my limited knowledge, thanks for all your help Mark

Offline SneakyTommy

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Re: Ubuntu.. missing after upgrade!!
« Reply #26 on: November 07, 2016, 08:58:41 am »
It seems that the easiest way here would be to hack your own system. Get *any* liveCD distro and boot it from CD or USB. I could explain step by step, but first please confirm that you are able to boot to the liveCD system and you can access the terminal.

alternative option would be to use root account to login into your Ubuntu. try it to enter
Code: [Select]
root
as a login and then password if you know it. That one SHOULD NOT give you an error with 'incorrect login' etc.

Offline Penndrow

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Re: Ubuntu.. missing after upgrade!!
« Reply #27 on: November 07, 2016, 07:07:48 pm »
Thanks Sneaky Tommy, will give root a try and see what happens.

Offline Penndrow

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Re: Ubuntu.. missing after upgrade!!
« Reply #28 on: November 07, 2016, 07:38:02 pm »
@Sneaky Tommy
using root to to login, still returns "login incorrect"  Incidentally this Windows 7 lap top is set up as dual boot Windows7/Ubuntu.

Offline Mark Greaves (PCNetSpec)

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Re: Ubuntu.. missing after upgrade!!
« Reply #29 on: November 07, 2016, 08:15:20 pm »
Have you tried resetting the password ?
WARNING: You are logged into reality as 'root'
logging in as 'insane' is the only safe option.
pcnetspec.co.uk

 


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