Firefox/4.0b8pre SeaMonkey/2.1b2pre
From: "James J. Weinkam"
Rich Walsh wrote:
> On Mon, 24 Jan 2011 22:53:01 UTC, "Doug Bissett" wrote:
>> On Tue, 7 Dec 2010 07:11:40 UTC, Lars Erdmann wrote:
>>
>>> Are you saying that on your system you have NO UHCI even though you
>>> have EHCI ? In other words: EHCI "builds on top of" OHCI and not on UHCI ?
EHCI controllers can coexist with but do not require the presence of either
OCHI or UHCI as Doug's
machine demonstrates. Some systems have all three types; others, just one or
two. Over the years I
have seen examples of every combination.
>> FWIW, my new Lenovo ThinkPad T510 has only two EHCI controllers. there
>> are no (ZERO) UHCI, or OHCI controllers. I can use USB 1.0, and 1.1
>> devices, with no problem, and it doesn't matter if I use the old IBM
>> EHCI driver, or your latest one. It still works.
>
> When I read this I just had to try it myself. If only it worked....
>
> With all my USBUHCD drivers rem'd-out and just USBEHCD active, my
> USB keyboard and mouse were dead. However, USBEHCD did disable
> legacy mode when I had it enabled - and it still took 70+ seconds.
> It's further proof that USBEHCD causes the delay that I experience.
What USBxHCD.SYS drivers you need to load depends on the USB hardware present
in your system.
The utility HCIMONIT.EXE that comes with IBM's basic usb package reports how
many OHCI, UHCI, and
EHCI controllers are installed in your system. (eCS2.0GA installs HCIMONIT.EXE
in b:\os2, where b is
the boot drive.) You need one BASEDEV=USBxHCD.SYS line for each type x
controller present. So if
HCIMONIT reports 2 OHCI, 2 UHCI, and 1 EHCI controller then you need 5 BASEDEV
lines: 2 ...O..., 2
...U..., and 1 ...E...; moreover these must precede the BASEDEV=USBD.SYS line.
If any of the
required driver instances are omitted, some usb devices will not work.
--- Internet Rex 2.31
* Origin: Aioe.org NNTP Server (1:261/20.999)
|
