[SeaBIOS] Failure to detect high-capacity SD card

Kevin O'Connor kevin at koconnor.net
Thu Feb 8 03:25:14 CET 2018

On Tue, Feb 06, 2018 at 07:38:22PM -0500, Chris wrote:
> Re: https://mail.coreboot.org/pipermail/seabios/2017-October/011862.html
> Did this ever get resolved? I didn't see a response to the final log.
> I'm experiencing the same thing on the same platform (ASUS C302 CAVE).
> Card brand doesn't seem to matter. I've tried 32GB Samsung EVO cards,
> various SanDisk cards from 32GB to 128GB. None show up as boot options
> in SeaBIOS. If I use the exact same data/layout except on a smaller
> card like 1GB of any brand then it works no problem.
> Same large cards boot fine off an external USB card reader. It appears
> to be an issue with the integrated SD card reader on the C302.
> I'm using the same latest MrChromeBox build from May 2017.

No - the issue was not resolved.  We looked at it, but could not
figure out what the SD card (and/or controller) did not like about the
seabios initialization sequence.  The sd card would stop responding
and it wasn't clear what seabios was doing different from linux (which
apparently works fine on the same hardware).

As Paul mentions, if you'd like us to look at this further, please
include the debug logs of a session.  It's possible additional tests
on new hardware will reveal the issue.


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