xleroy

I installed http://mirror.igorpecovnik.com/Cubietruck_Debian_4.0_jessie_3.4.108.zip, which looks like the version before the current one, and has U-Boot 2015.04. The two cores are detected! root@cubietruck:~# cat /proc/cpuinfo Processor : ARMv7 Processor rev 4 (v7l) processor : 0 BogoMIPS : 957.05 processor : 1 BogoMIPS : 830.00 Thanks for your help, Igor.

Thanks, Igor, for the hint. The bootloader prints its version as "U-Boot 2015.07-dirty (Aug 05 2015 - 09:17:32 +0200) Allwinner Technology". Moreover, the bootloader part of the SDcard compares equal to the u-boot-sunxi-with-spl.bin file from your Debian jessie image: dd if=/dev/mmcblk0 bs=1k skip=8 | cmp - /usr/lib/linux-u-boot-cubietruck_4.1_armhf/u-boot-sunxi-with-spl.bin End of file on /usr/lib/... So, is this the wrong bootloader? Which other bootloader could I try?

I just reinstalled my Cubietruck with the Debian jessie, image from http://mirror.igorpecovnik.com/Cubietruck_Debian_4.1_jessie_3.4.108.zip. Only one core is available. What could I do so that the two cores are detected? For what it's worth, the bootloader briefly displays a "checksum error" message. Could it be that I'm still using the old bootloader from the previous installation? (It was Debian wheezy in summer 2014.) Thanks in advance for advice.