Hi, On 03/31/2014 08:49 AM, Hans de Goede wrote: > Hi, > > On 03/30/2014 02:40 PM, Olliver Schinagl wrote: >> On 03/30/2014 02:25 PM, Ian Campbell wrote: >>> On Sun, 2014-03-30 at 12:26 +0100, Ian Campbell wrote: >>>> I've just FEL booted with 2014.04-rc2-00665-g96510e1 (i.e. current >>>> u-boot-sunxi.git#sunxi) onto a SATA installation and have started a >>>> git clone of the kernel, after which I'll run a build and see what >>>> happens. >>> >>> So, I did the git clone, checkout, config and "make all -j4" has been >>> running for quite a while now (>10 minutes) with no errors. While the >>> make was running I've messed around with "git archive" to produce a >>> tar.xz, got bored waiting for that, used wget to download a tar.xz from >>> kernel.org and unpacked it. All with no errors. >>> >>> IOW I'm afraid it all looks OK to me. >>> >>> This is all running from a SATA disk with a 2A power supply. >>> >>> I'm about to go out for lunch, if it crashes etc while I'm out I'll let >>> you know after I get back. >> Looking forward to the result, but I'm sure it'll be fine ;) >> >> So i changed to the u-boot that comes with fedora 19 from hans, as I did all >> my previous work with that, and untarring of the extracted tarball works now. >> >> I have to make a deadline for my book (building the BSP, hence i bumped into >> this) and will do more compile/extraction tests in the next few days as time >> permits on hans's u-boot. I'll run some of ssvb's benchmarks to test various >> things. >> >> If this is all deemed stable; then it can only be u-boot that somehow broke. >> The only thing I can imagine is tolerances or power usage somehow. Speaking >> of, during the extraction power jumped from just under 0.5 amps @ 4.85V = >> idle; to about 0.85 amps @ 4.75V. > > Hmm, this might be caused by the FAST_MBUS stuff we've for A20 now a days. > > You could try removing FAST_MBUS from the boards.cfg config options for > the cubietruck, and see how a recent u-boot build that way works.
Oh and another thing to test is to try replacing your powersupply, if is dropping that far below 5V then likely it is also outputting quite a bit of noise and spikes on the powerline. Your battery won't help you there since the power likely is not far enough below 5V to make it switch, so the board keeps using the bad powersupply taking in all the noise and power spikes. Regards, Hans -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
