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Number of people experience problems with USB on motherboards
using the VIA KT133 chipset, although these are not easily reproducible.
The problems are therefore likely to be due to a number of cumulative
problems. I therefore recommend the following:
- Enable an IRQ for USB in the BIOS
- Install VIA's USB Filter Driver
- Try setting "Enhance Chip Performance"
on both enabled and disabled in SoftMenuIII of the BIOS.
The USBMan
has worked with two independent manufacturers and found that
enabling this option resolves many USB problems on the KT7 series
of boards - see his ABIT
page for details.
- Do you have peripherals in PCI slots 4 or 6? These share
an IRQ with the USB controller and so moving devices out of
these slots, or swapping a different device into the slot if
all your slots are used, may resolve problems.
- Make sure you have an adequate power supply (at least 300W)
- Try modifying your memory settings (slower or faster) - this
has helped many people.
- Get better quality memory (several users have solved USB problems
by replacing generic RAM with Crucial or Mushkin brands)
- Some users have reported v4.25 of the 4in1 drivers
solved USB problems.
- There is a known bug in the Universal Host Controller driver
(Uhcd.sys) shipped with Windows 98SE that causes problems with
the VIA chipset. Microsoft have a patch for this available at
their support site under Q240075.
- Read the Microsoft Knowledge Base article entitled General
USB Troubleshooting in Windows 98, Windows 98 Second Edition,
and Windows Me. This includes many tips and links to
several other related Knowledge Base articles.
- Try ticking "disable USB error detection" in Device
Manager under Universal Serial Bus controllers, PCI to USB Universal
Host Controller
- Does your USB device load on a port exceed the power handling
capability of the onboard USB controller? This may be
the case with devices such as USB cameras, in which case purchasing
a powered USB hub would help.
- Problems often arise if you are trying to run your memory
too aggressively - try relaxing your memory settings (see memory
section). Try disabling Force 4-way Interleave
and Enable DRAM 4k-Page Mode in SoftMenuIII
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