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Everything Else => General Support and Discussion => Zaurus General Forums => Archived Forums => Accessories => Topic started by: jan on March 07, 2006, 05:24:05 pm

Title: Dmesg: "card Has Unknown Mmca Version 4"
Post by: jan on March 07, 2006, 05:24:05 pm

After I decided I wouldn't like SD anymore for their closed-source only policy I bought  1 Gig MMC card, to my surprise it was reasonably priced and theoretically fast (15MBit/s). OK it's a "plus" and I don't know whether Z supports "plus", but I can live with "minus" speed. It's works well in my camera's SD slot and not slower than my SD card.

Under OZ 3.5.3, kernel 2.6, I get the "mmc0:card has unknown MMCA version 4" in dmesg. Anyone familar with that? They should be downwards compatible; thus, I hope it would be sufficient to tell who ever issued that error to treat version 4 the same as prior versions. Any hints?

jan

Title: Dmesg: "card Has Unknown Mmca Version 4"
Post by: Hrw on March 08, 2006, 01:39:31 am

2.6 sd/mmc support is limited to type of cards for which specifications are available. This means that not all cards will work ;(

Title: Dmesg: "card Has Unknown Mmca Version 4"
Post by: koen on March 08, 2006, 04:12:38 am

There are several patches available to add mmca v4 to 2.6 and iirc one of them should be in 2.6.16

Title: Dmesg: "card Has Unknown Mmca Version 4"
Post by: jan on March 08, 2006, 07:55:19 am

Quote

2.6 sd/mmc support is limited to type of cards for which specifications are available. This means that not all cards will work ;(
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Now that I know that. Is there a compatibility list? (Vendors don't usually print things like MMCA version on the packages.)

Title: Dmesg: "card Has Unknown Mmca Version 4"
Post by: Hrw on March 08, 2006, 08:10:05 am

There is no such list. Making it is nearly impossible in a world where you can get 5 same looking cards which will be completly different inside.