[sf-lug] problem with Grub

[Bobbie Sellers]

On 1/12/22 07:58, Bobbie Sellers wrote:
> Hi LUGers,
> 
> Looking for items for my column in Status Register.
> I found the following information at this site about the
> supposedly new features Jammy Jellyfish Ubuntu 22.04
> will add.
>   <https://itsfoss.com/ubuntu-22-04-release-features/>
> 
> 
>> Grub 2.06 and the trouble that comes with it
>>
>> Ubuntu 22.04 LTS will have Grub bootloader version 2.06 but there is a
>>  problem with it. It has os-prober feature disabled by default.
>>
>> This means that if you are on a dual boot system, Grub won’t probe 
>> for other operating systems and thus it won’t list Windows (or other 
>> OS) in Grub.
>>  A few people, who upgraded to the development version of Ubuntu 
>> 22.04, have already started facing this issue.
> 
> So dual boot users might want to watch out for this.
> 

	Here is the solution according to alt.os.linux.ubuntu
posted by Marco Moock <mo01 at posteo.de>

>  It’s not that the problem cannot be fixed. There is a workaround.
> | 
> | Install os-prober (usually installed already) and then edit the
> | /etc/default/grub file to add GRUB_DISABLE_OS_PROBER=false to this
> | file. Save this file, update grub and Grub should see other operating
> | systems now.
> 
> Maybe annoying to new users that want dual boot and aren't familiar
> with changing that.
> The reason is discussed here:
> 
> https://lists.ubuntu.com/archives/ubuntu-devel/2021-December/041769.html
> 
> | os-prober is inherently insecure as it mounts all partitions
> | on your disk using grub-mount to check them for other OS,
> | which is not a nice thing to do as root as you can exploit
> | bugs in the filesystem code easily.


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