On Sat, 17 Sep 2005, Colin wrote: > Just did a little mroe careful testing, wasn't paying close enough > attention to hot/cold resets. After a cold reset, neither Windows or > Linux can power up dongle. So I suppose this is not a software > question. Nevertheless, has anyone had this problem, know of a maybe > firmware,BIOS,or other fix? > > Colin wrote: > > > > > I am using Belkin bluetooth USB Dongle F8T003 v2.11 with Linux kernel > > 2.6.12-rc3 and an Asus A7N8X-X motherboard. When I turn off the power > > on my computer I usually have to remove and reinsert the dongle to get > > the dongle to power on again (blue light flashing, showing up in > > lsusb). I can do this at any point during boot-up, even during the > > GRUB boot-loader screen. Occasionally the dongle does power on by > > itself when I turn the computer back on. Warm resets do not have the > > same effect: the dongle never loses power. Is there anything I can do > > from Linux to get the dongle to power on if it is off without removing > > and reinserting it. I am pretty sure but not 100% that Windows has a > > way of doing this as I haven't had the problem yet with the dongle and > > Windows.
This is a strange situation, no question. Could it be that even when the computer is turned off, there's a small leakage of current from the power supply through the USB port -- enough to confuse the dongle? Suppose you try making sure the computer is _really_ off: Unplug its power cord. (If it was a laptop, you would remove the battery too.) Leave everthing off for at least a minute. As far as the dongle can tell, there shouldn't be any difference between doing that and unplugging it. So will the dongle then work when you turn the computer back on? Another thing to try is using the dongle on a different computer. Does the same thing happen? Alan Stern ------------------------------------------------------- SF.Net email is sponsored by: Tame your development challenges with Apache's Geronimo App Server. Download it for free - -and be entered to win a 42" plasma tv or your very own Sony(tm)PSP. Click here to play: http://sourceforge.net/geronimo.php _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
