WHat are the contents of /proc/bus/usb/devices, the output of "lspci -vvv" 
and the output of lsmod?

On Thu, 9 Jan 2003, Simon Wu wrote:

> 
> PLEASE REPLY  ALL AS I AM NOT ON THE MAILING LIST
> 
> Hello,
> 
> I have a Dell Pentium3 PC which has a built-in USB host. I need to expand 
> the USB ports so I added a 4-port USB1.1 hub. However when I connected more 
> than two 384kbps modems (ACM modem) to the hub, the speed on some modem drop 
> dramatically. It only support up to two 384ktps modems. I thought the HUB 
> should be able to support 4 modems with full speed because the total rate is 
> only about 1/10 of 12Mb/s supported by USB1.1. Anyone know what could be the 
> problem?
> 
> So, I decided to add a 2nd PCI-USB host(USB2.0 hardware). My redhat linux 
> 7.2 can detect the hardware at boot up, and installed the driver. But when I 
> put the modem on the 2nd host (the PCI one), the linux system couldn't 
> detect the modem. Can we config Redhat7.2 for more than one root hosts?
> 
> The other question is is USB2.0 available for Redhat 7.2? If so, will 
> upgrade to USB2.0 solve my problem. Or do I have to use PCs with built-in 
> USB2.0 host?
> 
> 
> Thanks,
> 
> 
> Simon
> 
> 
> 
> 
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