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No USB Devices Working

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I need help for my USB1.1 and 2.0.

They are detected but no fonctional.

I have an Asus K8V-X SE Mobo with a Chipset Southbridge VIA8237R.

I have Zephyroth OSX Leopard 10.5.2 AMD EFI. All works fine, only USB.


I read this http://forum.insanelymac.com/index.php?showforum=156 but didn't help me.

USB Legacy Support is fully disabled in BIOS but I have -legacy paramter in com.apple.Boot.plist

I run USB Prober, with some USB devices connected, you can see my printer and 2 USB Keys plugged, here a screenshot:


but noone is mounted on the desktop or really detected - I can't detect my printer for example.


dmesg | grep -i USB is KO: no output, no result, blank

if I do kextload -v -t /System/Library/Extensions/IOUSBFamily.kext/Contents/Plugins/PCGenUSBEHCI.kext

I have "PCGenUSBEHCI.kext is already loaded; so I think it's OK.


I don't know what's happened? what can I do?


Any help would be appreciated.

If needed, I can join/add some log of USB Prober or additional screenshots.


Thanks :(

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Try this:


In terminal:
sudo su -
type your password
rm -rf /System/Library/Extensions/caches


If it works you can make a script that load at startup (but I don't know how)


I've had similar issue, but after 10.5.2 update USB work flawless.


good luck

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you don't have to reboot, but you have to type the command everytime you startup, if you don't write a script that load automatically at startup.


As for the -legacy parameter I'm not sure, I wasn't usign that option.


Try without removing and see if it works.

if not, you can decide if remove and retry.

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Fantastic Vash!!


It works: my USB Keys are mounted and my printer HP PSC 1350 is here and fully fonctional


Good jon, thanks


But now I need a script to load at each startup! :unsure:

Tested without removing -legacy parameter from com.apple.Boot.plist and USB Legacy setting to [Auto] in BIOS.

EDIT: Another problem: it seems that after 5 or 10 minutes, I need to re-do the command to empty Extensions Cache, otherwise, same problem as before: USB Devices are not mounted!!! :( But not very disturbing at all. Perhaps there is an esay to fix this (a script?)


But, Thanks for all Vash :thumbsup_anim:

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