How to delete nomodeset from my grub file in order to boot normally?
If Ubuntu does not work, you can still access your installation via chroot
.
Be aware that the live system must have the same architecture (32 or 64bit) as your system on the hard disk.
Boot from a Live media of Ubuntu (USB/CD/DVD) and open a terminal (CTR+ALT+T). The general idea here is to mount the (root) partition of Ubuntu and then chroot
in it.
First give this command to list the partitions
sudo fdisk -l
here is an example result
/dev/sda1 * 2048 206847 102400 7 HPFS/NTFS/exFAT
/dev/sda2 206848 81922047 40857600 7 HPFS/NTFS/exFAT
/dev/sda3 81922048 625142447 271610200 5 Extended
/dev/sda5 81924096 140517375 29296640 83 Linux
/dev/sda6 140519424 433487871 146484224 83 Linux
If this does not work, you can also use gparted
(open the dash and type gparted
) to find what your root partition is.
I know that my Ubuntu (root) partition is /dev/sda5 (because I have a separate /home in /dev/sda6).
Now I will mount the /dev/sda5 in /mnt
sudo mount /dev/sda5 /mnt
Now I will connect to /mmt and mount some other folders that might be needed.
cd /mnt
sudo mount -t proc proc proc/
sudo mount -t sysfs sys sys/
sudo mount -o bind /dev dev/
sudo mount -t devpts pts dev/pts/
Now I will chroot to my Ubuntu installation
sudo chroot /mnt
Edit the file you want.
nano etc/default/grub
Be careful the forward-slash here. etc
not need forward-slash in the beginning because you will edit the wrong file then.
Now remove the entry nomodeset
(or anything else)
save the file with CTRL + X , then Y(es) and then ENTER.
now update grub
update-grub
Exit the chroot enviroment and unmount the folders - partitions
exit
sudo umount {proc/,sys/,dev/pts,dev/}
cd .. ; sudo umount /mnt
The changes have been applied.. reboot your system.
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don.joey
Before I was called Private, but due to namespace polution I am henceforth known as don.joey! For my real avatar (.gif): check here.
Updated on September 18, 2022Comments
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don.joey over 1 year
How can I delete the option
nomodeset
in/etc/default/grub
? Or, more precisely, how can I access a command line in order to delete the option?I have set it in my grub file trying to debug this bug. Now I can not longer access the Ubuntu recovery mode in order to delete the
nomodeset
from the grub file. I do not know how to get access to a command line without access to the recovery mode.CTRL + ALT + F1 or F7 does not work. The last messages I get are
starting LightDM display manager
andstopping save kernel messages
so I think the system does start fine.Is there a way (keyboard shortcut) to boot into a terminal for instance?
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don.joey about 11 yearsI do not know what I was thinking this morning. The bounty text should read: "Your answer is well written, it was fast, it saved me the time of figuring this out again. Also I think it is interesting for future reference. Thank you."
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