Unable to start machine or boot from USB (SOLVED)

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Larry78723
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Unable to start machine or boot from USB (SOLVED)

Post by Larry78723 »

Per subject, I'm unable to post any information about the machine. It is a refurbished Thinkpad T450 and was working fine earlier today. I've run all available test thru the bios and all came out OK. I was able to run boot repair disk but that only made things worse. Now can't even boot from USB.
I'm at a grub prompt and the error I'm getting is as follows:

"GNU GRUB version 2.02
Minimal BASH-like line editing is supported. For the first word, TAB lists possible command completions. Anywhere else TAB lists possible device or file completions."

URL for Boot Repair report: http://pastebin.ubuntu.com/p/8HmR3zR7PB/

I tried running fsck -af /dev/sda but get error "can't find command". Never ran into this so all help is appreciated.


TIA,
Larry

NOTE: I'm on my test machine to post this.
Last edited by Larry78723 on Mon Dec 30, 2019 2:21 am, edited 1 time in total.
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Larry78723
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Re: Unable to start machine or boot from USB

Post by Larry78723 »

I managed to get to a tty login using the following:

Code: Select all

grub> set root=(hd1,gpt2)
grub> linux /boot/vmlinuz-5.0.0-37-generic root=/dev/sda2
grub> initrd /boot/initrd.img-5.0.0-37-generic
grub> boot
Ran blkid and cat /etc/fstab and found an error for sda2(/) UUID in fstab. Now I need to know how to edit fstab while in a tty prompt. I tried startx to get into the desktop but it failed.

EDIT: Tried running sudo nano /etc/fstab from the tty prompt and editing the UUID but tells me system is read only when I try to save it.
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jglen490
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Re: Unable to start machine or boot from USB

Post by jglen490 »

So at this point will it be easier to find and fix everything that's wrong, or try to save your data and just reinstall?
I feel more like I do than I did when I got here.
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Kadaitcha Man
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Re: Unable to start machine or boot from USB

Post by Kadaitcha Man »

Larry78723 wrote:
Sun Dec 29, 2019 7:52 pm
EDIT: Tried running sudo nano /etc/fstab from the tty prompt and editing the UUID but tells me system is read only when I try to save it.
That's the correct command but first you need this:

sudo mount -o remount, rw /
It's kad-eye-cha, not kada-itcha.

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Re: Unable to start machine or boot from USB

Post by pbear »

Larry78723 wrote:
Sun Dec 29, 2019 5:18 pm
Now can't even boot from USB.
That's probably a problem with the USB. Try burning another, preferably using a different flash drive. Then, before you install, confirm you are booted in EFI mode. (That's one of the things complained about in the boot repair report, see line 578). Run ls /sys/firmware and make sure efi is listed.
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If your problem has been solved, please edit the thread title.

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Re: Unable to start machine or boot from USB (SOLVED)

Post by Larry78723 »

Solved by first deleting sda1 (EFI) and sda2 (/) with GParted then reinstalling
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Re: Unable to start machine or boot from USB (SOLVED)

Post by pbear »

Larry78723 wrote:
Mon Dec 30, 2019 2:22 am
Solved by first deleting sda1 (EFI) and sda2 (/) with GParted then reinstalling
Glad you got it working, but I don't see how deleting the sda partitions could have solved the USB boot problem. Also, how did you get to GParted if the USB drive wouldn't boot? Do you have a separate GParted Live disk?
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