Swap rpi3 to rpi4 with same SD card

[Jack]

Hello,

I just got a rpi4, ans seen that I have too many thing installed on my
rpi3, I want to take the sd card from the rpi3 and put it on the rpi4.

I'm following this tutorial
<https://seven1m.sdf.org/tutorials/upgrade_raspberry_pi_3_to_4_with_same_sd_card.html>

but I have a problem with step5: when I try to reinstall the bootloader,
I get his error:

pi@raspberrypi:~ $ sudo apt install --reinstall raspberrypi-bootloader
raspberrypi-kernel
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Reinstallation of raspberrypi-bootloader is not possible, it cannot be
downloaded.
Reinstallation of raspberrypi-kernel is not possible, it cannot be
downloaded.

Any ideas how to solve it?

Thanks bye
Jack
--
Yoda of Borg am I! Assimilated shall you be! Futile resistance is, hmm?

[Martin Gregorie]

On Thu, 15 Jul 2021 13:47:35 +0200, Jack wrote:

> Hello,
>
> I just got a rpi4, ans seen that I have too many thing installed on my
> rpi3, I want to take the sd card from the rpi3 and put it on the rpi4.
>
> I'm following this tutorial
> <https://seven1m.sdf.org/tutorials/
upgrade_raspberry_pi_3_to_4_with_same_sd_card.html>
>
> but I have a problem with step5: when I try to reinstall the bootloader,
> I get his error:
>
> pi@raspberrypi:~ $ sudo apt install --reinstall raspberrypi-bootloader
> raspberrypi-kernel Reading package lists... Done Building dependency
> tree... Done Reading state information... Done Reinstallation of
> raspberrypi-bootloader is not possible, it cannot be downloaded.
> Reinstallation of raspberrypi-kernel is not possible, it cannot be
> downloaded.
>
> Any ideas how to solve it?
>

IIRC, all current RPi software versions contain the software needed to
boot and run on any RPi, so how long is it since you last updated the
software on that SD card?

IOW, if you haven't done so recently, update that card image on the RPi3
and try again, but be aware that the /dev/mmcblk0p1 boot partition, which
is mounted on /boot, used to be very small (50MB or less), so if you
haven't resized it recently, you should copy the card contents to a new,
bigger SD card with /dev/mmcblk0p1 increased to at least 500MB - I'm
currently using 16GB cards with a 1GB boot partition.


--
Martin | martin at
Gregorie | gregorie dot org

[Jack]

yes, I had to resize the /boot partition (now is 300MB).
In the meantime I found the issue.
For some reason I didn't have the raspi.list in /etc/apt/sources.list.d/
(probably beccause the isnallation is very old), so apt didn't get the
repository
deb http://archive.raspberrypi.org/debian/ buster main ui

where raspberrypi-bootloader and so on are.

Added it, and after and apt update and full-upgrade later, the rpi4
booted up correctly.

Bye Jack