Re: "cannot create /boot/grub/grub.cfg.new: Read-only file system" on a Power Mac G5

On Sat, Aug 10, 2024 at 09:25:17PM +0300, ilko Iliev wrote:
>  Hello,  
>   Whenever I'm trying to upgrade/install something I get the following errors.
>   I'd appreciate some pointers as to where to begin as I'm clueless on the matter. 
> 
>  _______________________________________________________________________________________________________    apt-listchanges: Reading changelogs...
> (Reading database ... 131680 files and directories currently installed.)
> Removing linux-image-6.1.0-9-powerpc64 (6.1.27-1) ...
> /etc/kernel/postrm.d/initramfs-tools:
> update-initramfs: Deleting /boot/initrd.img-6.1.0-9-powerpc64
> /etc/kernel/postrm.d/zz-update-grub:
> /usr/sbin/grub-mkconfig: 270: cannot create /boot/grub/grub.cfg.new: Read-only file system
> run-parts: /etc/kernel/postrm.d/zz-update-grub exited with return code 2
> dpkg: error processing package linux-image-6.1.0-9-powerpc64 (--remove):    
> installed linux-image-6.1.0-9-powerpc64 package post-removal script subprocess returned error exit status 1
> dpkg: too many errors, stopping
> Errors were encountered while processing:
> 
> linux-image-6.1.0-9-powerpc64
> Processing was halted because there were too many errors.
> Error: Sub-process /usr/bin/dpkg returned an error code (1)

So what do you have mounted as /boot and/or /boot/grub?

I know some people in the past very incorrectly mounted their UEFI boot
partion as /boot or /boot/grub and that can be a problem.  Of course
that doesn't apply to powerpc so I guess something else is the problem.

If /boot/grub is readonly, then clearly something isn't mounted right.