Changing kernel for ubuntu

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Changing kernel for ubuntu

Postby dharmesh » Thu Dec 05, 2013 1:18 am

I downloaded the ubuntu sdcard image from wandboard.org and booted the board. Then I am trying to build a different kernel version and use it with the ubuntu build. I simply copied the uImage, zImage and vmlinux files to the /boot/ folder of the ubuntu rootfs on sdcard. But somehow it still boots with older kernel.

Is the kernel image flashed within the first 8MB of the sdcard like u-boot? How can I come to know of the address at which the kernel needs to be overwritten.
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Re: Changing kernel for ubuntu

Postby Tapani » Thu Dec 05, 2013 7:57 am

The uImage kernel should be 1M into the SD card. We are considering to use a boot folder / partition.
Check the SDK documentation for details (under downloads).
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Re: Changing kernel for ubuntu

Postby Hardy » Mon Dec 09, 2013 11:11 am

Hi Tapani,

but in general it is possible to replace the existing kernel by a new compiled kernel from the wandboard SDK?
I have now added SPI to board-wand.c - now UBUNTU Gui does not start - SPI on console is working fine -
Can you provide an kernel with enabled SPI?
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Re: Changing kernel for ubuntu

Postby sagarreddy » Thu Jun 22, 2017 7:06 am

After an update, the GRUB configuration is updated to boot the latest version, and previous versions can be manually selected in the GRUB menu during bootup. To change the default kernel to boot you can do the following: 1. Open the file /etc/default/grub.
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