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07-02-2009
| #1 (permalink) |
| | Re: USB erratic after update a couple weeks ago Paul Furman wrote: Quote: > Durn thing has a mind of its own. Whole groups of USB ports turn > themselves on & off every 10 minutes now. > > This seems to be a possible explanation/fix: > http://forums.techarena.in/vista-help/921053.htm > [ Re: USB stops working after recent Windows Update > It is more of a hardware problem believe it or not. The thing is that > some motherboards have internal watchdogs to make sure that USB ports > are not overloaded since they consume on average 500 mA of current. This > mechanism of kicking off some additional USB ports also involves the OS, > or course. What perhaps happened was that after some updates the demand > on the MB went up because of some additional work Vista needs to do now > perhaps on a short term basis (like for a few minutes) and it just trips > over the threshold.] > > What I did is... I had 2 USB hubs daisy chained in one port of the > 'puter, so I plugged each individually into a port... at least some of > the probs seem to have resolved. Of course I had it set up that way for > a reason... some devices only worked plugged direct to the 'puter but > who knows, maybe that's not a problem now? Er, yeah, still a problem but > some more port switching seems to resolve partly. USB voodoo... problems slightly. Anyone else experiencing these problems? Any more ideas? -- Paul Furman www.edgehill.net www.baynatives.com all google groups messages filtered due to spam |
My System Specs |
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07-02-2009
| #2 (permalink) |
| | Re: USB erratic after update a couple weeks ago Paul Furman wrote: Quote: > Durn thing has a mind of its own. Whole groups of USB ports turn > themselves on & off every 10 minutes now. > > This seems to be a possible explanation/fix: > http://forums.techarena.in/vista-help/921053.htm > [ Re: USB stops working after recent Windows Update > It is more of a hardware problem believe it or not. The thing is that > some motherboards have internal watchdogs to make sure that USB ports > are not overloaded since they consume on average 500 mA of current. This > mechanism of kicking off some additional USB ports also involves the OS, > or course. What perhaps happened was that after some updates the demand > on the MB went up because of some additional work Vista needs to do now > perhaps on a short term basis (like for a few minutes) and it just trips > over the threshold.] > > What I did is... I had 2 USB hubs daisy chained in one port of the > 'puter, so I plugged each individually into a port... at least some of > the probs seem to have resolved. Of course I had it set up that way for > a reason... some devices only worked plugged direct to the 'puter but > who knows, maybe that's not a problem now? Er, yeah, still a problem but > some more port switching seems to resolve partly. USB voodoo... > http://www.online-tech-tips.com/comp...ot-recognized/ |
| My System Specs |
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07-03-2009
| #3 (permalink) |
| | Re: USB erratic after update a couple weeks ago fatsteve wrote: Quote: > Paul Furman wrote: Quote: >> Durn thing has a mind of its own. Whole groups of USB ports turn >> themselves on & off every 10 minutes now. >> >> This seems to be a possible explanation/fix: >> http://forums.techarena.in/vista-help/921053.htm >> [ Re: USB stops working after recent Windows Update >> It is more of a hardware problem believe it or not. The thing is that >> some motherboards have internal watchdogs to make sure that USB ports >> are not overloaded since they consume on average 500 mA of current. >> This mechanism of kicking off some additional USB ports also involves >> the OS, or course. What perhaps happened was that after some updates >> the demand on the MB went up because of some additional work Vista >> needs to do now perhaps on a short term basis (like for a few minutes) >> and it just trips over the threshold.] >> >> What I did is... I had 2 USB hubs daisy chained in one port of the >> 'puter, so I plugged each individually into a port... at least some of >> the probs seem to have resolved. Of course I had it set up that way >> for a reason... some devices only worked plugged direct to the 'puter >> but who knows, maybe that's not a problem now? Er, yeah, still a >> problem but some more port switching seems to resolve partly. USB >> voodoo... > Try this. Worth a shot. > > http://www.online-tech-tips.com/comp...ot-recognized/ reboot the motherboard. That did work and it reinstalled the drivers. Lately it's the printer that konks out... maybe 20 minutes of computing & I'll hear the usb boo-boop sound, with the device manager open I see that one of the hubs now says Unknown Device. The printer isn't taking any power so that trashes my theory in the first link above... before I had a lot of trouble with an external sound card, and that has always had various issues, plus it would just turn amost anything on & off like the mouse, card reader... It seems like USB has always been unreliable, I don't know why <sigh>. I didn't have these problems till the latest vista updates a month or less ago. Maybe a clean reinstall when windows 7 is ready... -- Paul Furman www.edgehill.net www.baynatives.com all google groups messages filtered due to spam |
| My System Specs |
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