Installation / Removal > Sandisk - Installation/Removal

C250 USB Charges but no Windows Device

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yapper:
This:
--- Quote ---boot the OF then go into the menu and manually enforce MSC mode even if its already in MSC mode
--- End quote ---
sounds decidedly weird. As you said the problem didn't occur until a few days after installing Rockbox, it makes me suspect some kind of hardware problem.

DevoiD:
I'm going to try removing rockbox, updating with the sansa updater then re-installing rockbox I'll post results back up

Tai1:

--- Quote from: DevoiD on November 20, 2008, 11:48:37 PM ---okay found a way to get it to work, it only works if I boot from off and hold down the |< key to boot the OF then go into the menu and manually enforce MSC mode even if its already in MSC mode, then plug the unit in, it comes up as a device... otherwise I got bupkiss.... it would be nice to not have to do that and just plug it in from "off" and have it just boot up and connect, does anyone have any idea's?

--- End quote ---
I have the same problem with two Sansa C200's.  I tried the work-around above and they worked.  I found that you can also turn the unit off while plugged into the USB port (when it is not recognized by Windows) and do the MSC mode routine.  When you turn the unit back on, Windows will recognize it.  Another work-around is before you connect the unit, remove the micro SD card.  But then you would need a separate reader to load the micro SD.

I think this is some kind of a firmware bug on Rockbox.

pixelma:

--- Quote from: Tai1 on December 28, 2008, 01:51:41 PM ---Another work-around is before you connect the unit, remove the micro SD card.  But then you would need a separate reader to load the micro SD.
--- End quote ---
You don't (at least I do not). The microSD does not need to be inserted from the beginning, you can also plug the card once the USB connection is established. By the way - this is already answered a few times here in the forums and made its way into the SansaFAQ in the wiki.


--- Quote from: Tai1 on December 28, 2008, 01:51:41 PM ---I think this is some kind of a firmware bug on Rockbox.
--- End quote ---
Considering that the original firmware is responsible for the USB connection currently, I wouldn't be so sure about that. My impression is that it is some kind of timing issue because: only sometimes I have trouble establishing the data connection (and more often on an old laptop but not only there) - and because booting takes a bit longer than without Rockbox due to going "through" the additional bootloader.

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