I had the exact same problem on my Ubuntu laptop and after swearing at
it for 2 hours I discovered the problem was caused by a USB hub.  When
I connected the G1 directly to the laptop the problem went away.

If you see this problem I would try removing any USB hubs from the
equation first.  If you are using a desktop try using the USB
connectors at the back of the machine, as the ones at the front can
sometimes be on a hub.

Slan,
Cian

On Feb 14, 6:12 pm, Al Sutton <a...@funkyandroid.com> wrote:
> If you're running Vista you may just be stuffed.
>
> I have two machines, an XP one and a Vista one. The Vista one always
> lists the G1 as being offline and reports no problems with the driver
> installation (no yellow triangle, no error message, just a "This device
> is working properly." in the Device Status box).
>
> Take the same G1, same cable, and plug it into the XP box, and use the
> same SDK revision, and everything just works.
>
> Al.http://andappstore.com/
>
>
>
> GiladH wrote:
> > Hi,
>
> > If you're ALWAYS having this problem - your best bet it so go to the
> > driver manager and look for yellow (i.e. incompletely installed) USB
> > drivers
>
> > If you're having this problem every now & again - just boot your PC
> > when it happens. couldn't figure out anything smarter than that..
>
> > GiladH
>
> > On Jan 27, 10:56 pm, Hypercreature <dricejum...@gmail.com> wrote:
>
> >> Hey GiladH,
> >> I'm having the same problem. How did you fix it? A restart or
> >> something? Thanks.
>
> >> On Dec 2 2008, 10:15 am, GiladH <gila...@gmail.com> wrote:
>
> >>> Problem resolved.
> >>> Probably due to improper USB driver installation.
>
> >>> On Dec 1, 10:34 pm, GiladH <gila...@gmail.com> wrote:
>
> >>>> Guys,
>
> >>>> I can debug my app just fine with the emulator.
>
> >>>> However, when I connect my G1 device to desktop via USB and attempt
> >>>> to run/debug my app on it (after following "Developing on Device
> >>>> Hardware" steps in android docs) I fail.
>
> >>>> The error msg I get: "Failed to upload MyAppName.apk on device
> >>>> 'HT841LC09904':Unabletoopensyncconnection!"
>
> >>>> Running "adb devices" displays the G1 device is as 'offline'.
>
> >>>> The G1 relevant configuration values are:
> >>>>      - Wireless controls>Airplain mode==true
> >>>>      - SDCard >Use for USB storage==false
> >>>>      - Application>Unknown Resources==true
> >>>>      - Development>USB Debugging==true
>
> >>>> Also - application section of manifest app contains:
> >>>> android:debuggable="true"
>
> >>>> Any helpful idea will be welcomed.
>
> >>>> GiladH
>
> --
> ======
> Funky Android Limited is registered in England & Wales with the
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> 152-160 City Road, London,  EC1V 2NX, UK.
>
> The views expressed in this email are those of the author and not
> necessarily those of Funky Android Limited, it's associates, or it's
> subsidiaries.

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