Solved SOLVED - How to Boot Up Linux Hung at Flashing Grub Cursor

July 27, 2016 at 21:21:35
Specs: Linux x86_64
Hey guys, here’s (the) a solution to presumably any Linux box (I use Ubuntu) which won’t completely boot up (either warm- or cold-boot), but hangs at a flashing cursor at grub-loader:

Conventions: whether initiating the process or responding to the last screen presented, what you type into/on the keyboard is indicated in red. Obviously, hit/tap the enter key after you’ve finished typing for your input to be accepted.

1) At the flashing cursor, type set root=(hd0,1)*

2) On the next line presented, type linux /vml [press the tab key immediately after typing vml]

3) The computer populates the previous line after the tab key input. At the flashing cursor, type root=/dev/sda1 ro**

4) On the next line at the flashing cursor, type initrd /ini [press the tab key immediately after typing ini]

5) The computer populates the previous line after the tab key input with the kernel version*** At the flashing cursor, press the enter keyboard

6) On the next line at the flashing cursor, type boot

7) After you press the enter key (after having typed boot), the computer should resume booting up successfully!

Good luck!


* this assumes that you either have only one hard drive with only one partition or that linux is installed on the first partition of the first hard drive – adjust as necessary!

** after typing “root=/dev/” what is typed immediately after the forward slash MUST be the ROOT (not boot) partition designation!

In other words, if you only have one hard drive with one partition, “root’ would be included in this partition. However, if you have a separate ‘boot’ partition, or even MORE, such as ‘boot’,‘root’, ‘usr’, ‘home’, etc., whatever partition is designated as ‘root’ must be what is typed at this point. The ‘ro’ may be optional, but stands for “read only”.

*** If you have more than one kernel installed, instead of what’s indicated in my instructions at this point, you will get a listing of the installed kernels, with your next input being manually typing in whichever one you select? Then continue with the above instructions.

To avoid having to perform this extra input step, you will need to purge all extra kernel versions installed except the one you want to keep – usually, the lastest (newest) one. Merely google (or anyone is welcome to amend these instructions to include how to purge a kernel) to find out how to purge a linux kernel.

Note: Occasionally, this manual grub-loader boot-up process hangs – merely reboot to start over the process.




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#1
July 27, 2016 at 22:41:43
Thanks for your contribution, but it's very possible for a particular symptom to have several causes and therefore several different fixes (just like Windows in fact).

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#2
July 28, 2016 at 10:09:33
✔ Best Answer
Should be posted in the HOW-TO section.

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