Thanks for your answer.

I changed that in the uEnv.txt file but now my BBB does not boot. When I 
power my BBB, the four leds are stationary and they don't blink as they did 
before. So maybe, the Preempt kernel is bad installed? or could it be 
anything else?

El lunes, 20 de julio de 2015, 21:05:54 (UTC+2), RobertCNelson escribió:
>
> On Mon, Jul 20, 2015 at 1:51 PM, Pablo <[email protected] <javascript:>> 
> wrote: 
> > Hi, I have a BBB rev C. 
> > 
> > I installed the latest debian image (2015-03-01, Kernel: 3.8.13-bone70) 
> and 
> > flashed it to the eMMC. After that, I followed some instructions to 
> install 
> > a Preempt kernel. 
> > The guide I followed is this one: 
> > 
> http://dev.ardupilot.com/wiki/building-the-code/building-for-beaglebone-black-on-linux/
>  
> > 
> > Apparently, all went well. I only skipped a step where I had to make a 
> > backup of a zImage. And that's one problem, there's nothing in 
> /boot/uboot/, 
> > I can't find zImage... Is that normal? I thought that zImage was called 
> at 
> > boot time to load everything, so where does my BBB boot from? 
> > 
> > But the installation of Preempt looks fine. 
> > 
> > root@beaglebone:~# ls /lib/modules 
> > 3.8.13-bone70  3.8.13-rt9-00899-g6d55dce-dirty 
> > 
> > I have the rt folder, but 
> > 
> > root@beaglebone:~# uname -a 
> > Linux beaglebone 3.8.13-bone70 #1 SMP Fri Jan 23 02:15:42 UTC 2015 
> armv7l 
> > GNU/Linux 
> > 
> > i'm still running the old kernel version, how can I boot from the 
> Preempt 
> > kernel? 
>
> Make sure you set the uname_r variable in: 
>
> /boot/uEnv.txt 
>
> uname_r=3.8.13-rt9-00899-g6d55dce-dirty 
>
> Then make sure: 
>
> /boot/dtbs/$(uname -r)/*.dtb 
> /boot/vmlinuz-$(uname -r) 
>
> exist... 
>
> Regards, 
>
> -- 
> Robert Nelson 
> https://rcn-ee.com/ 
>

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