Control: tags -1 upstream moreinfo On 2010-08-03, Daniel Kahn Gillmor wrote: > when i try to use fw_setenv for the ethaddr variable on a Marvell > guruplug, i get this error (mac address is anonymized): > > 0 root@moo:~# fw_setenv ethaddr 00:f0:43:XX:XX:XX > Can't overwrite "ethaddr" > 1 root@moo:~# > > however, i'm able to reset the variable from the uboot bootloader directly: ... > So the source for fw_setenv seems to be unnecessarily restrictive.
It may be because you were using a fw_setenv without any platform-specific build options. I'm wondering if using fw_setenv explicitly built for guruplug will work any better. Version 2014.07+dfsg1-2 in jessie and 2014.10~rc2+dfsg1-2~exp1 in experimental ships a fw_printenv/fw_setenv that is built specifically for each platform in /usr/lib/u-boot/PLATFORM/fw_*. It seems some platforms may set values for allowing this to be changed (ENV_FLAGS_VARACCESS_PREVENT_OVERWR and ENV_FLAGS_VARACCESS_PREVENT_NONDEF_OVERWR in tools/env/fw_env.c), and a build specifically for the guruplug may work for you. I was planning on reverting back to a generic env tools build, though I'd be curious if it works with a platform-specific build. live well, vagrant
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