In agreement with Charles, If it's just one USB connector that stops working you may be able to trace the paths nearby, but since you are loosing all of your USB connectors, I think the assumption of a hairline crack is more probable. Unfortunately, I would imagine this crack to be somewhere close to the southbridge on the motherboard and not anywhere near the USB connectors themselves. I too doubt this can be easily traced/fixed.
On Sun, Dec 7, 2008 at 1:52 PM, Charles Cranston <[EMAIL PROTECTED]> wrote: > My best thought is you have a hairline crack on the motherboard, and when > you flex the machine just-so, it bends the motherboard such that the crack > opens. But first I would take a look at where the USB connector is > connected to the motherboard, because often the mechanical stress of > plugging and unplugging, or even displacing the USB plug up and down while > connected, is enough to cause that solder joint to fail. With single or > double sided boards one can bridge such a crack with a small piece of wire, > but most complex circuit boards are multi-layer these days, and are > essentially unrepairable by the layman. However, if it's just the USB > connector, you might be able to carefully solder it back. > > > On Dec 7, 2008, at 1:24 PM, Ed Kohlwey wrote: > > Hi Everyone, >> As some of the group regulars know I've been having problems with my >> laptop "flipping out" lately. When pressure is applied to the case in a >> certain way, anything connected on USB stops working, and I get a slew >> of errors in dmesg (attached below). The computer will also refuse to >> boot the first 20 or so times that I hit the power button after such an >> event. To get it to turn back on I have to shake it, disconnect the >> power supply, etc. a few times. The really weird thing is that I can >> negate the effects of the "flip out" by suspending and resuming the >> laptop before a complete power down (at least this seems to work >> consistently, I'm not completely sure if this is actually connected or >> not). >> >> My first intuition was that it might be a short, so I opened up my case >> and covered most of the bare metal with either plastic or electrical >> tape. For a while, the computer would also turn itself off, and the >> electrical tape fix seems to have at least remedied that behavior. >> >> Does anyone have any ideas on how to troubleshoot this sort of issue? It >> seems almost certain to me that its electrical in nature, but short of >> what I've done I don't really have any ideas. >> >> -Ed >> >> >> ==================================================================== >> [ 2437.744104] usb 1-1: USB disconnect, address 2 >> [ 2438.052062] usb 1-1: new full speed USB device using uhci_hcd and >> address 3 >> [ 2438.172170] usb 1-1: device descriptor read/64, error -71 >> [ 2438.396053] usb 1-1: device descriptor read/64, error -71 >> [ 2438.612070] usb 1-1: new full speed USB device using uhci_hcd and >> address 4 >> [ 2438.732056] usb 1-1: device descriptor read/64, error -71 >> [ 2438.956131] usb 1-1: device descriptor read/64, error -71 >> [ 2439.172058] usb 1-1: new full speed USB device using uhci_hcd and >> address 5 >> [ 2439.580046] usb 1-1: device not accepting address 5, error -71 >> [ 2439.692043] usb 1-1: new full speed USB device using uhci_hcd and >> address 6 >> [ 2440.104051] usb 1-1: device not accepting address 6, error -71 >> [ 2440.105410] hub 1-0:1.0: unable to enumerate USB device on port 1 >> [ 2440.106752] hub 3-0:1.0: port 1 disabled by hub (EMI?), >> re-enabling... >> [ 2440.106763] usb 3-1: USB disconnect, address 5 >> [ 2440.107160] btusb_intr_complete: hci0 urb ffff880074099600 failed to >> resubmit (19) >> [ 2440.111402] btusb_send_frame: hci0 urb ffff880060b29cc0 submission >> failed >> [ 2440.600069] usb 3-1: new full speed USB device using uhci_hcd and >> address 6 >> [ 2440.720071] usb 3-1: device descriptor read/64, error -71 >> [ 2440.944056] usb 3-1: device descriptor read/64, error -71 >> [ 2441.160051] usb 3-1: new full speed USB device using uhci_hcd and >> address 7 >> [ 2441.280063] usb 3-1: device descriptor read/64, error -71 >> [ 2441.504071] usb 3-1: device descriptor read/64, error -71 >> [ 2441.720060] usb 3-1: new full speed USB device using uhci_hcd and >> address 8 >> [ 2442.128053] usb 3-1: device not accepting address 8, error -71 >> [ 2442.240052] usb 3-1: new full speed USB device using uhci_hcd and >> address 9 >> [ 2442.648041] usb 3-1: device not accepting address 9, error -71 >> [ 2442.649393] hub 3-0:1.0: unable to enumerate USB device on port 1 >> >
