os-prober is a command that lists other operating systems. It is used during installation and reconfiguration to create a GRUB boot menu that shows other installed OSes as well as Ubuntu.
Questions tagged [os-prober]
24 questions
108
votes
13 answers
GRUB does not detect Windows
I have finally installed Ubuntu on my second drive. When I start my computer GRUB only offers me to boot Ubuntu, not Windows 7. What needs to be done so that I can choose between Ubuntu and Windows in GRUB?
When I press F12 for boot menu at startup…
HyperX
- 1,241
- 2
- 10
- 5
12
votes
0 answers
OS-prober is taking a really long time
Any time I update my GRUB configuration or install a kernel update that has the update manager update my grub configuration, the os-prober part of the configuration hangs for sometimes 10-20 minutes. I have a few partitions including windows,…
user256518
- 179
7
votes
1 answer
os-prober and update-grub find windows install, yet it does not show in boot menu
My system runs Ubuntu 21.04. I recently moved the system from an old SSD to a new M.2 drive, using Clonezilla. In that process, I needed to run update-grub.
The system boots up fine, but I cannot choose to boot the Windows 10 install I have on…
el_murdoque
- 81
4
votes
2 answers
os-prober doesn't find Arch Linux until I manually mount Arch Linux partition
Title says everything. Here is output of Boot info script: http://paste.ubuntu.com/1169338/
sudo os-prober returns only Windows partition:
sudo os-prober
/dev/sda2:Windows 7 (loader):Windows:chain
If I manually mount Arch Linux partition with…
kv1dr
- 1,381
4
votes
1 answer
Just installed Ubuntu 22.04 on a dual-boot setup, now my other OS isn't showing up
I just installed Ubuntu 22.04 on my system in a dual-boot configuration. In the past, when I did this with Ubuntu 20.04, a GRUB boot menu would show up at each boot, allowing me to choose which OS to boot. However, this doesn't happen anymore - I am…
ArrayBolt3
- 7,292
3
votes
1 answer
os-prober does not return Windows 10 on another drive
I'm 1-day old to Linux, so excuse me if my question is not very clear!
I have my Windows 10 on HDD. I added an SSD and installed Ubuntu on it. Both boot perfect except Windows is always the default and have to press F12 and select to boot from SSD…
Majid
- 51
3
votes
2 answers
How to bypass or stop the very long run times of grub2/os-prober?
Whenever I upgrade Ubuntu 16.04 and there is a kernel upgrade, the update process takes a very long time when running (os-prober) and also generates the grub configuration multiple times.
And for some inexplicable reason to me it runs more than…
keepitsimpleengineer
- 6,795
3
votes
2 answers
os-prober and update-grub can't see/find working Windows install
I have installed 12.04 next to a Windows 7 install, on a partitioned 3 TB hard disk. If I use F12 during boot to review boot options from the BIOS, Windows 7 and Ubuntu boot normally, but the Ubuntu GRUB only gives me Ubuntu options.
When I try…
JeanSibelius
- 3,682
2
votes
1 answer
OS-Prober not recognized!
So due to some shenanigans with trying to get rid of all traces of grub-customizer, I accidentally hit "delete" an extra time while in a root nautilus, and deleted my os-prober script in /etc/grub.d/30_os-prober.
So I was about to freak out and come…
WindowsEscapist
- 1,492
2
votes
1 answer
Grub doesn't detect Windows 10 and os-prober shows no output (tried existing solutions)
I'm facing an issue with Grub not detecting my Windows 10 installation. I have come across a similar question on this forum, but unfortunately, the suggested solutions haven't worked for me.
When I run sudo fdisk -l, the following output is…
1
vote
0 answers
How to repair grub to work with multiple hard drives?
On my computer I have multiple hard drives. One of them has Ubuntu 14.10 and the other has Windows 8.1. I messed up my boot loader and know only Ubuntu appears in the grub list. Windows 8.1 is on the first hard-drive, and Ubuntu is on the second.…
Nate Barton
- 11
1
vote
2 answers
Windows 7 doesn't show in GRUB menu
I have dual boot with Ubuntu and Windows 7. I needed to reinstall W7 and after that I reinstalled grub so that I could access both Ubuntu and W7.
Unfortunately my GRUB menu doesn't show W7. I tried update-grub, I also tried os_prober and then…
Formaiko
- 13
- 3
1
vote
1 answer
How can I set kernel parameters for a specific installation involving os-prober?
Beside Ubuntu i also have an Arch installation. I plan to maintain the grub-configuration from my Ubuntu. The whole update-grub - grub-mkconfig - os-prober-chain works just fine.
I know I can set GRUB_CMDLINE_LINUX for options to be passed to the…
funky-future
- 214
1
vote
3 answers
os-prober fails to identify a linux system so I need to write a custom grub2 menu entry as a workaround, how?
I want to add a custom menu to grub2 like this (as /etc/grub.d/40_custom):
#!/bin/sh
exec tail -n +3 $0
# This file provides an easy way to add custom menu entries. Simply type the
# menu entries you want to add after this comment. Be careful not…
keepitsimpleengineer
- 6,795
1
vote
0 answers
18.04: Does os-prober work well for kernel v5?
os-prober on an Ubuntu 18 instance using the Google Compute Engine (image: ubuntu-minimal-1804-bionic-v20200220 - "Canonical, Ubuntu, 18.04 LTS Minimal, amd64 bionic minimal image built on 2020-02-20") returns an unexpected partition:
#…
John
- 133