On 2015-05-27, Rick Thomas wrote: > On 05/26/15 13:35, Vagrant Cascadian wrote: >> On 2015-05-26, Rick Thomas wrote: >>> On May 26, 2015, at 12:44 PM, Rick Thomas <rbtho...@pobox.com> wrote: >>>> On May 26, 2015, at 10:32 AM, Vagrant Cascadian <vagr...@aikidev.net> >>>> wrote: >>>>> On 2015-05-26, Rick Thomas wrote: ... >>> I installed the file in that URL as /etc/fw_env.config and when I run >>> fw_printenv, it says >>> Warning: Bad CRC, using default environment >>> and prints only a few lines. I was expecting to see the many-line printout >>> I get when >>> I do âprintenvâ in u-boot. >>> >>> Is this expected behavior? >> It is if you're running the default environment and haven't saved your >> environment to the mmc (e.g. saveenv from the u-boot prompt). >> >> >>> Iâm running uboot version 2015.04+dfsg1-2 >> That's the right version... >> >> >> In general I prefer to work with the default environment, as I'm often >> testing new u-boot versions and want to make sure it continues to work >> with the defaults, and it can be tricky to remember to reset the default >> environment. ... > Thanks for the explanation. I wasn't aware that there were two > environments. Is this explained somewhere? I'd love to RTFM if I only > knew where the FM was!
I don't think of it as two environments... it's two different sources for the environment settings. You have the built-in settings which is in the binary (e.g. u-boot, fw_printenv), and you have the saved settings stored on some media (e.g. SD, NAND). If the saved settings aren't found, it uses the built-in defaults. > I assume, if I do "saveenv" in uboot, that I'll make the two > environments equal and see the same thing from fw_printenv in Linux as I > do from printenv in u-boot? Is this correct? > > ... I tried it and that's what happened. Thanks! So u-boot had a different set of defaults than fw_printenv, as this particular u-boot is built specifically for the cubox-i and has an environment appropriate to the cubox-i, while the defaults for fw_printenv are built for the sandbox config, which is admittedly not a very useful default, but there's no reasonable universal default... I suppose I should document this in README.Debian... live well, vagrant
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