why would my onboard SD/MMC reader suddenly stop working?

[Liam Proven]

On 11 November 2012 12:43, Robert P. J. Day <rpjday at crashcourse.ca> wrote:
>
>   currently, on my ASUS G74S laptop, i get absolutely no activity when
> i insert a perfectly valid SD card.  used to be, it would be mounted
> automatically -- now ... nothing.
>
>   i've rolled my own kernels for quite some time, and i just keep
> using the same .config.  i've checked the kernel config options, and
> pretty much everything under SD/MMC is selected as modules.
>
>   i've tailed the kern.log file, i've put udev in monitor mode trying
> to figure out if *anything* recognizes that an SD card has been
> inserted and nothing so far.  the mmc_block module is currently
> loaded.
>
>   am i just stupidly missing something obvious?  i mean, besides the
> reader itself being actually broken?
>
>   off to experiment some more ...

[1] Try a different card.
[2] Try the suspect card in a different machine and/or different reader.
[3] Try under a different OS, e.g. a LiveCD.

You need to isolate exactly what's going wrong.

I have seen solid-state Flash media just die for no apparent reason,
several times now: CF, SD, microSD.


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