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Yocto and IMX 6 Element14 devlopment kit

Former Member

Good morning,

 

     I just received my IMX 6 Element 14 devlopment Kit and I try to put some free linux on it. My goal is to use the 2D and 3D graphical card's acceleration. So I try first to build the sabre_lite yocto image as in the thread ( https://community.freescale.com/docs/DOC-93844 ). Well it build well on a Fedora 16. And with the original q_bootscripts of the timesys image it start booting on my kit. I have to change the partition of the SD Card but it works. So I was then very glad, evrything was smooth and work well. But ... Then I try to plug a keyboard on the kit, and I ve got some error ( kernel panic ) during the boot and the boot stop, perhaps udev can't handle the keyboard during the boot ?  I've try to get the network working but the kernel stop too.

If plug after the boot the keyboard works well and there's no kernel panics. So it's just during the initial boot.

 

So are there people who succeded to boot the yocto image with this element14 kit ? Or the prefered free are just lbit and linearo ?

 

My next step will probably be to update the u-boot and to try the lbit / linearo image.

But it will be very helpfull to know if there was some people which succeded with yocto( and how they have done it ). Yocto seem's to be the freescale prefered linux distribution, and well it's seem very cool.

 

Thanks,

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  • 0

    I see some kernel panics on boot of the 3.0.15 kernel, something to do with the graphics drivers, however they don't hang the system. Networking works fine, plugged in at boot or not.

     

    You really think Yocto is cool when it builds something that kernel panics and hangs the system if you have a keyboard plugged in at boot ? 

     

    I don't think that's cool at all..

  • 0 in reply to Former Member

    Thanks for the answer.

         So yes I think yocto is a cool project, and yes kernel panick are awfull. And so it can't be used for an industrial purpose.  The principle behind yocto are interesting, it's just to bad that it just don't work for this kind of board. I don't think the kernel panic are due to yocto. It's seem there are some patchs tath are missing for the kernel.

    I was interested to see if someone has succeeded to use it, and if there was some patchs to apply or anything else to make it works. So it's seem that in the end, I ve got to try something else.

    So loosing some time to make something compiling is not cool at all when it doesn't work, but the whole project behind this compilation will perhaps one day be usefull... for another cards. My post was just a message in a bootle for another try to this project. I see that you've got the same trouble as me so, let try linearo !

  • 0 in reply to Former Member

    Hi there, I have had good luck with yocto on a sabrelite imx6q board.

     

    I followed these instructions:

    https://community.freescale.com/docs/DOC-93844

     

    note that I used a linux mint v14 64bit (based on ubuntu 12.04) virtual machine to build everything I need. On a linux mint 12 it failed.

    You will need extreme amounts of space (>100GB) for a full image, as the build process, fetches sources, patches and configures and buildes everything, then packages them and builds ready images. so lots of space.

  • 0 in reply to Former Member

    Hello nass

     

    We have followed that same document to generate images for the imx6 sabre lite e14 board. We get the images (on a Ubuntu 12.04) but the board does not start well. After the kernel ends loading, we have different kernel panic messages on every start. Sometimes the system gets going , most of the times it gets stopped.

     

    Thinking it was a hardware problem, we even get replaced the board. But the second board does the same thing: kernel panics and stops.

     

    However our problems do not seem to be related to keyboard. We start the board with nothing connected (except the serial console output and the SD card)

     

    Any advice or test is welcomed.

     

    Thank you

  • 0 in reply to Former Member

    Hi there,

    I only now saw your message.

    Well I don't know the cause of the kernel panic. perhaps you can provide some feedback.

    On top of my head, I'll say that the uboot version on the element14 sabre lite board, is different to the one the sdcard yocto image expects.

     

    You can either replace the uboot of the sabrelite board to a newer version (sorry no link. haven't done it yet, but soon), or you can manually extract the tar.bz2 yocto image and replace the filesystem in the sdcard (but avoid deleting the bootscript files, and make sure you name the new kernel exactly as the old one).

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  • 0 in reply to Former Member

    Hi there,

    I only now saw your message.

    Well I don't know the cause of the kernel panic. perhaps you can provide some feedback.

    On top of my head, I'll say that the uboot version on the element14 sabre lite board, is different to the one the sdcard yocto image expects.

     

    You can either replace the uboot of the sabrelite board to a newer version (sorry no link. haven't done it yet, but soon), or you can manually extract the tar.bz2 yocto image and replace the filesystem in the sdcard (but avoid deleting the bootscript files, and make sure you name the new kernel exactly as the old one).

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