Reliability of booting from SD (no replies)

Hi,

booting my tablet from SD is highly erratic. To describe the effect, from e.g. 17 boot attempts only 7 succeed. This does not mean, that half of the attempt work, but instead, long series of failures can occur, although i initialized device before each attempt.

I wonder, whether this reflects the known state of the spl/u-boot implementation or any known issue.

I'm using a recent u-boot from linux-sunxi and a sunxi-3.4 kernel.

Thanks, cobalt

--
My tablet is a PROTAB2-IPS9 (V1.0)