| Re: USB suddenly died, system started to freeze a lot
"BillW50" <BillW50@aol.kom> wrote in message
news:464f4afc$0$18537$834e42db@reader.greatnowhere .com...
> "M.I.5¾" <no.one@no.where.NO_SPAM.co.uk> wrote in message
> news:464c0022$2_1@glkas0286.greenlnk.net
>> "none" <nospam@bogusaddress.com> wrote in message
>> news:FJH2i.8686$ya1.2888@news02.roc.ny...
>>> a POWER SURGE ON USB HUB indicates to me either an over current or
>>> over voltage condition occurred. IF that is the case one must wonder
>>> it the mobo voltage converter which supplies USB voltage/current is
>>> intact.
>>
>> Not necessarily. This failure mode is actually quite common. It is
>> seldom possible to work out what has caused the port to fail in a way
>> to give this error message. It should be pointed out that it is not
>> the 5 volt supply from the port that has a problem, but the one or
>> both of the receivers on the two data lines. The 5 volt supply will
>> not be enabled if the host is unable to enumerate the port.
>
> I see an error message if I use the USB webcam and the USB TV tuner card
> at the same time. Although it only flashes for a half of a second when I
> plug the last one in and then both are operating just fine. I don't use
> them on a hub, but rather my laptop has 4 built in USB ports. I would
> never purchase a laptop without at least 4 USB ports on it. :)
>
Hmm. I can only assume that the port is flagging the problem to the host
and then recovering to operate normally. If it is not inconveniencing
normal operation, then just ignore it. |