Raspberry Pi Forums

Hello,

I am trying to build a custom distribution for my raspberry pi model B.

I tried a few things, but none of them worked.
I tried a cross compiled linux from scratch, but g++ wont compile because uClibC does not contain tmpnam.

I tryed to build the distro on the raspberry, but i estimated a build time of 60 hours.

I tried, then, buildroot and I managed to build something.
The first time I used the configuration file given by buildroot to build it. It worked.
The second time, I configured it manually following a tutotial about buildtoot on the raspberry. It woked

However, on both the cases above, I have a problem when booting the Raspberry. I can see the color shading, but nothing else.
I believe that the firmware worked and the kernel has been lauched, but is writing stuff on its uart. I dont have a uart cable. So I can't check

How could I ask buildroot to make the kernel write its stuff on the screen ?

Thanks you.

How does your "/boot/cmdline.txt" look ?

This is my file on standard raspbian. If you are right and that your image actually boots then maybe there is some kernel option that is not present.

Hello,

My cmdline.txt is :

dwc_otg.lpm_enable=0 console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 console=tty1 elevator=deadline rootwait root=/dev/mmcblk0p2 rootfstype=ext4

Apparently, it is the same as yours, apart the root argument...

A fdisk on my SD card gives (sorry, it is in french) :

Disque /dev/sdd : 7948 Mo, 7948206080 octets, 15523840 secteurs
Unités = secteur de 1 × 512 = 512 octets
Taille de secteur (logique / physique) : 512 octets / 512 octets
taille d'E/S (minimale / optimale) : 512 octets / 512 octets
Type d'étiquette de disque : dos
Identifiant de disque : 0x000981cb

Périphérique Amorçage Début Fin Blocs Id. Système
/dev/sdd1 8192 122879 57344 c W95 FAT32 (LBA)
/dev/sdd2 122880 15523839 7700480 83 Linux

I followed this tutorial :
http://cellux.github.io/articles/diy-li ... ot-part-1/
I just changed the kernel version, an chose the 3.12 (the last version of the rpi repo)

Is their any information I can give ?


EDIT : Well, I solved my error. The name of the kernel I put on the card was kernel.img, but I printed the config.txt file, and I saw that the name should be, this time, zImage. Actually, the kernel were not launched. I changed the name of the kernel on the card, and it is now working.
Thank you, and sorry for your time

Helvinion wrote:I dont have a uart cable. So I can't check

If you're trying to build your own distro, you'll find a UART cable extremely useful for debugging