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>>> Here is why USB2.0 adapters are hit and miss... <<<

 
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SteakMan is offline Old Post 07-16-2003 10:48 PM
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SteakMan
TiVo Forum Special Member

Registered: Nov 2001
Location: Chicago
Posts: 765

Here is why USB2.0 adapters are hit and miss...

True backwards compatibility will not be seen in Linux until the 2.5 kernel

http://www.linux-usb.org/usb2.html

quote:
Linux Status
People have been using USB 2.0 with usb-storage devices from Linux hosts since June 2001. But it was only towards the end of that year, a short while before Linus created the 2.5 development branch, that other USB 2.0 devices (notably, hubs) began to be available. So while some changes for USB 2.0 were rolling into 2.4 kernels through the year 2001, largely done by about 2.4.10, the most tricky stuff (the ehci-hcd driver) stayed separate until the 2.5 kernel branched. All current Linux distributions include EHCI support, and the end-user bug reports have been helping to stabilize that driver.
Host Controller Driver Support
At this writing the "ehci-hcd" driver is not as well proven as the OHCI or UHCI drivers, so it's still labeled experimental, but it's just fine for many purposes.
So some USB 2.0 adapters will work in some USB 2.0 ports and not others. It is probably dependent on chipset. If a future TiVo release is based on the 2.5 kernel, the support will be built in. I just discovered this recently so I couldn't tell you if TiVo is using the latest experimental driver or not, but it isn't something to blame TiVo about.

-SteakMan-

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>>> Here is why USB2.0 adapters are hit and miss... <<<

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