How to start Grub2-bootloader from extlinux-bootloader?
 

Hello,
what is the syntax for doing it?
Thanks.

From one grub menu, I can load another grub2 thru:

kernel /boot/grub/core.img

Try something similar and it may work for you.

Hey, did you try it and did it work?

I will.. thanks. but having other things to do (making firefox running again etc.). I will post the result here.

I copied the grub2 files from a archbang linux cd on the SD ext2 drive (core.img etc. files).
The result of the extlinux command is

invalid or corrupt kernel error
boot:

I think it may work if grub2 is properly installed on SD drive. After that it may become loadable from extlinux.

how? I loaded the grub-1.99 tar file from the GNU page, but could not find the core.img etc.
So, I will now google in order to know how to manually install grub2 (without messing up my SD8GB with extlinux).
In any case, any advice is welcome.

It will make question clear if you could mention what exactly you want to do. What are you trying to boot and from where?

Use a ubuntu or mint live cd and follow the directions in Section 12 "Reinstalling GRUB2"

grub2

or did you mean to chainload grub2 from which bootloader (lilo, legacy, grub2, or etc.)?

From the title and initial post it appears that floppy_stuttgart wants to chainload grub2 (on SD ext2 drive) from extlinux.

Here is one of my entries

menuentry "Suse @ sdb6" {
set root=(hd0,6)
chainloader +1

If you want specific directions we will need more information.

Apparently the requirement is loading grub2 from extlinux, not from another grub2 (as suggested by you). Extlinux code is required so that grub2 can be loaded/chainloaded.

Here is the background of my small project....
I have 2 travel devices: CF8GB and SD8GB (both extlinux multibooting; same content: knoppix,tinycorelinux,partedmagic,slitaz,puppy, warry,slicko,hwlist,ubcd,keyboard changes, start grub4dos boot, start plop bootmanager...).
Both devices can be mounted on PCs (when travelling; showing linux to friends; installing Linux on a colleague PC).
In particularly the SD card: I have it in everytime my pocket, with an USB multiadapter and a DSL-USB-Modem (www.fonic.de): I can use nearly any PC I have in my hands anywhere and go into the internet.
I want to extend these CF and SD devices with salix live.
SD: can be mounted on an USB adapter. In this case a USB booting PC can start with one of the linux distro.
can be placed in an SD port. Possible on newer PCs.
CF: can be mounted on an IDE adapter or on an USB adapter. I can nearly start any PC with it (IDE is good in case the PC is not USB booting)

For the reason, I dont achieve a proper booting of salixlive in extlinux (the CD is with grub2; and I dont understand all grub2 entries); see http://www.linuxquestions.org/questi...format-911876/, the Idea I have now is (example the SD8GB):
- boot a PC with the SD8GB (on USB adapter or direct in the PC)
- in the extlinux menue of the SD, choose the submenue "start grub2"
- start grub2 placed on this SD card (ext2!)
- grub2 should then find the salixlive data and start (hopefully..).
If I chainload the entry "start grub2" to the SD, then I will probably be again in the extlinux menue.
For example, on this SD, I can start grub4dos (not chainloading), then this allow all grub4dos functionality (use of memdisk for example).
The same is perhaps possible with grub2? (for start of salix live)

From your other post:

It means salix is starting to boot all right, so you don't need to link to grub2. This is a common problem with slax (distro similar to salix) also. Search their active forum or ask there: http://www.slax.org/forum.php