Failure to boot Industry scenario on UP2 Atom x7-E3950.

Andrew Back


Hardware is UP Squared P/N: UPS-APLX7-A20-0464 fitted with a 240GB mSATA

Followed the getting started guide at:

Installing the UOS to the SATA drive and SOS to the 64GB eMMC. ACRN
built with:

make all BOARD_FILE=misc/vm_configs/xmls/board-xmls/apl-up2.xml

Proceeded to build and install the kernel, and update Grub. Upon
rebooting "loading ACRN..." is printed out and there is a pause for a
few seconds, following which the system reboots. No other output at all.

I saw the note in the FAQ regarding memory and it looks as though the
default configuration for both CONFIG_PLATFORM_RAM_SIZE and
CONFIG_SOS_RAM_SIZE is 16GB, which seems odd, since AFAICT there is no
UP2 board available with more than 8GB fitted. In any case, I followed
the instructions at:

Setting the aforementioned parameters both to 4GB and reducing
CONFIG_UOS_RAM_SIZE to 1GB. Then rebuilt with 'make all RELEASE=0'
(specifying the XMLs this time resulted in error) and installed ACRN
again. However, this didn't seem to make any difference. Though I saw
after build that there was a .config file in build/hypervisor/ which had
the default higher RAM values configured, instead of those which I'd set
in hypervisor/build/.config. See the attached. Is the custom config
somehow being ignored? Maybe this is not the main issue even if so...

My guess is that ACRN is not being loaded at all / the build is very
broken, else I would expect this to at least print something out. Also
wondered if using a serial console would help in debugging? Wasn't sure
if this could provide greater insight into early boot failures.

Let me know if this looks like it may be an actual bug and I should log
this on the issue tracker. At this point however I'm suspecting user
error :o)



Andrew Back

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