[svlug] mounting sd card

[Larry Colen]

On Fri, Feb 22, 2008 at 11:44:47AM -0800, Akkana Peck wrote:
# Larry Colen writes:
# > On my fedora box, if I plug an SD card into the reader, or plug in the
# > usb sd card reader, magic happens and the card is visible as a drive. 
# > 
# > On my kubuntu laptop I need to run the command
# > 
# > sudo modprobe -r ehci-hcd
# > 
# > and then the magic will happen.
# 
# What you're doing there is removing the USB2 driver, so that only
# USB1 is present ... then you can mount the device, but only at the
# slow USB1 speeds. That's not a good solution -- you really want
# to find out why USB2 isn't working.

That explains why file copies are so slow on the laptop.


# There are other problems that can happen with the magic automounting
# you're talking about, but since removing ehci_hcd cures it I'd try
# checking hub power first.  And remember, even a USB port on your
# machine might be a hub if your machine has more than two USB ports,
# so try different ports if you don't have a powered hub available.

It's a T41 thinkpad. It happens on both USB ports with two different
SD readers.

In retrospect, it used to work fine, until one evening where it
crapped out in the middle of a copy, so Daniel's suggestion that it is
a hardware problem is beginning to seem likely.


-- 
         "I just can't fathom how far light would travel in 6nSec"
Larry Colen             lrc at red4est.com            http://www.red4est.com/lrc