[SeaBIOS] Failure to detect high-capacity SD card

Chris coderight+seabios at gmail.com
Fri Feb 23 13:06:24 CET 2018

On Fri, Feb 23, 2018 at 12:24 AM, Kevin O'Connor <kevin at koconnor.net> wrote:
> This looks to be very similar to the issue Matt raised back in
> October.  It seems the card needs to run at 1.8 volt (instead of 3.3
> volt), but it seems to shutdown before telling seabios that.
> Can you apply the patch at:
> https://mail.coreboot.org/pipermail/seabios/2017-October/011892.html
> set the seabios debug level to 3, and send the log again?

Yes, I believe we're using the same hardware.

With the patch it still fails.

During boot devices were:
* mmcblk0 internal 64GB SSD (detected).
* mmcblk1 internal card reader with 64GB bootable card in it (fails to
be detected).
* External USB reader that has 2 slots, one is empty, the other has a
1GB microsd (detected).


Looks like the same problem where the card won't respond and times out.

I still need to see if I can get some debugging information from a
Linux kernel because everything works fine there. I'm not sure how to
go about turning it on.


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