lucero Posted February 21, 2017 Share Posted February 21, 2017 Hello everyone, First of all, I'm sorry for my English. I'll do my best. Currently armbian is installed in the mmc (although I tried the same test with a sd memory). Now, with lscpu I can see that only cpu0 is enabled; 1-3 are off. When I try: sudo echo '1' | Sudo tee / sys / devices / system / cpu / cpu1 / online to activate cpu1, shell replies with: online: Permission denied I'm looking for options on root permissions or sysfs mount options; For now, I can not find a solution. Thanks in advance for your help. Link to comment Share on other sites More sharing options...
Igor Posted February 21, 2017 Share Posted February 21, 2017 You have wrong u-boot / boot script combination and you are most likely using not supported developing kernel ? ... it's not possible to activate cpu's from user space. Link to comment Share on other sites More sharing options...
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