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Can't power-off with USB modem installed

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7 replies

by komp Jun 14, 2001 last reply Jun 24, 2001 1 view

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Hi,

I recently bought a Creative ModemBlaster USB modem to replace my old serial counterpart. However, after I installed the modem, my system will no longer power off until I unplug the USB cable from the modem. When I issued a shutdown command from Win98 or even push the power button from the BIOS screen, the system's power LED (along with the fan) will go off for about 1 second, then come back on (with the fan humming) for another second, then off again. This off/on cycle will go on forever until I pull out the USB cable from the back of the modem. I have disable all the power management features from the CMOS setup, but didn't help. I have also contacted tech support, but of course, they never cared.

My question is: does anybody with a USB modem and an ATX power supply have similar experience, and is there any way to remedy the problem? Any comment or suggestion is welcome. Thanks.

Rgds,
Kom

7 replies

by lwt Jun 14, 2001

What type of chipset and processor do you have? There is a known USB timing glitch with AMD processors over 350 MHz and VIA chipset boards. If you have these, you may have to reinstall your motherboard drivers with the new patches and also the USB filter, along with a patch from Microsoft.

by komp Jun 24, 2001

Yes I do have an AMD processor over 350 MHz (Duron 800) and VIA chipset (KT133A), but I don't think any patch would solve the problem because I could not shutdown even at the POST screen, without loading any OS.