MDM problem: not able to log in

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Tommo
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MDM problem: not able to log in

Post by Tommo » Tue May 29, 2018 10:46 pm

Hi, please excuse my gross ignorance. I am getting this message when trying to log into my computer after it had been working fine with Linux Mint 18 Cinnamon 64 bit. I believe the problem is from running out of space on the hard disk, and I hope the solution is glaringly obvious to some kind soul on here.

"MDM could not write to your authorization file. This could mean that you are out of disk space or that your home directory could not be opened for writing. In any case, it is not possible to log in. Please contact your system administrator."

Unfortunately, I am my own system administrator, but had just started using Linux a few days prior and don't have a hard copy of a tutorial. I'd guess the solution is just deleting some of the standard programs accompanying the Linux Mint that I had tried to install. How would I be able to do that if I'm not able to log in and access the file manager?

Thanks and kind regards,
Thomas

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WharfRat
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Re: MDM problem: not able to log in

Post by WharfRat » Tue May 29, 2018 11:50 pm

Hello Tommo

Welcome to Linux Mint and the Linux Mint forum :)

It might help to verify that you are out of disk space.

Boot the media you used to install Mint, mount the linux partition to /mnt and paste back df -h

If you don't know how to mount the linux partition, paste back the results of sudo blkid to determine your linux partition.
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Tommo
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Re: MDM problem: not able to log in

Post by Tommo » Fri Jun 22, 2018 10:25 pm

Thanks very much for the help, and apologies for the extent of time it took me to respond. This is what the second command you suggested returned (I was indeed unable to do the first one):

Code: Select all

/dev/sda1: SEC_TYPE="msdos" LABEL="DELLUTILITY" UUID="3030-3030" TYPE="vfat" PARTUUID="a0aa0b0d-01"
/dev/sda2: LABEL="Recovery" UUID="CC70378A703779F2" TYPE="ntfs" PARTUUID="a0aa0b0d-02"
/dev/sda3: LABEL="OS" UUID="AC7C4EC27C4E86D4" TYPE="ntfs" PARTUUID="a0aa0b0d-03"
/dev/sda5: UUID="3d4b60fe-f9f1-434f-99d9-75da1c159875" TYPE="ext4" PARTUUID="a0aa0b0d-05"
/dev/sr0: UUID="2016-06-28-12-50-06-00" LABEL="Linux Mint 18 Cinnamon 64-bit" TYPE="iso9660" PTUUID="43694d2e" PTTYPE="dos"
/dev/loop0: TYPE="squashfs"
/dev/sda6: UUID="f5b7cd03-e899-492d-a30e-d7b4e66f03b5" TYPE="swap" PARTUUID="a0aa0b0d-06"
Hopefully this makes more sense to you. Might it be better to just reinstall the linux mint cinnamon OS after saving some files I want? I don't think I need to keep the Windows on there.

Cheers,
Tom
Last edited by WharfRat on Sun Jun 24, 2018 8:58 am, edited 1 time in total.
Reason: Added code tag

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WharfRat
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Re: MDM problem: not able to log in

Post by WharfRat » Sun Jun 24, 2018 8:58 am

Tommo wrote:
Fri Jun 22, 2018 10:25 pm
Thanks very much for the help, and apologies for the extent of time it took me to respond.
No problem. I was unavailable for a couple days myself.

Your linux partition is /dev/sda5 so running the live session enter sudo mount /dev/sda5 /mnt then paste back df|grep ^/dev/sda5
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Tommo
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Re: MDM problem: not able to log in

Post by Tommo » Sat Jul 07, 2018 5:16 pm

Thanks again, and apologies again for the long time between responses - I don't have easy access to the internet because of this issue. I followed your instructions, though the first bit I typed into the command line didn't seem to return anything but another command line. Then I I typed in the second command. This is the full record of what was returned from both of those:

mint@mint ~ $ sudo mount /dev/sda5 /mnt
mint@mint ~ $ df|grep ^/dev/sda5
/dev/sda5 75702376 75683932 0 100% /mnt
mint@mint ~ $

Cheers,
Tom

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WharfRat
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Re: MDM problem: not able to log in

Post by WharfRat » Sat Jul 07, 2018 9:24 pm

Well it is now verified - your linux partition is full so you're out of space.

If there is stuff you can clear out you can access your home folder after mounting the partition with sudo mount /dev/sda5 /mnt like you did before and cd /mnt/home/yourname where yourname would be your user name.

Otherwise if you have spare disk space you might be able to enlarge the partition with gparted.
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