From: pvm <pvm...@gm...> - 2007-10-27 01:37:37
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I have two USB wifi dongles attached to my Gumstix one through the 60pin board and the other through the 24 pin connector. Each works fine on its own but if I reboot with both plugged in, the Gumstix spontaneously reboots after printing the loading messages for "usbcore" but before it prints the messages about loading pxa27x-ohci. No error messages are printed. If I boot with only one usb device attached everything is fine and I am able to connect the second after boot. Anyone else experience this problem? or is it possibly faulty wifi drivers causing the problems. Thanks, -Pete -- View this message in context: http://www.nabble.com/Never-Ending-Boot-Loop-w--2-sub-ports...-tf4700744.html#a13438264 Sent from the Gumstix mailing list archive at Nabble.com. |
From: Jon H. <jo...@hu...> - 2007-10-27 02:28:50
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On Fri, 26 Oct 2007 18:38:49 -0700 (PDT), pvm <pvm...@gm...> wrote: > If I boot with only one usb device attached everything is fine and I am= able > to connect the second after boot. Anyone else experience this problem?= or > is it possibly faulty wifi drivers causing the problems. Sounds to me like your USB devices may be drawing too much power = together. Try plugging one of them into a powered USB hub, and see if the same = thing happens... Later, Jon -------------------------------------------------------------- Jon Hylands Jo...@hu... http://www.huv.com/jon Project: Micro Raptor (Small Biped Velociraptor Robot) http://www.huv.com/blog |
From: Dave H. <dhy...@gm...> - 2007-10-27 05:37:04
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Hi Pete, > I have two USB wifi dongles attached to my Gumstix one through the 60pin > board and the other through the 24 pin connector. Each works fine on its > own but if I reboot with both plugged in, the Gumstix spontaneously reboots > after printing the loading messages for "usbcore" but before it prints the > messages about loading pxa27x-ohci. No error messages are printed. > > If I boot with only one usb device attached everything is fine and I am able > to connect the second after boot. Anyone else experience this problem? or > is it possibly faulty wifi drivers causing the problems. The problem is most likely power related. Wifi dongles draw close to 500 mA each, plus the gumstix draw and its probably exceeding whatever power source you're using. -- Dave Hylands Vancouver, BC, Canada http://www.DaveHylands.com/ |
From: pvm <pvm...@gm...> - 2007-10-27 11:04:16
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Dave Hylands wrote: > > The problem is most likely power related. Wifi dongles draw close to > 500 mA each, plus the gumstix draw and its probably exceeding whatever > power source you're using. > If that were the case then why can I plug both in after bootup and have everything work normally? -Pete -- View this message in context: http://www.nabble.com/Never-Ending-Boot-Loop-w--2-USB-ports...-tf4700744.html#a13442050 Sent from the Gumstix mailing list archive at Nabble.com. |
From: Jon H. <jo...@hu...> - 2007-10-27 12:25:01
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On Sat, 27 Oct 2007 04:04:14 -0700 (PDT), pvm <pvm...@gm...> wrote: > If that were the case then why can I plug both in after bootup and have > everything work normally? Most devices surge on powerup. Later, Jon -------------------------------------------------------------- Jon Hylands Jo...@hu... http://www.huv.com/jon Project: Micro Raptor (Small Biped Velociraptor Robot) http://www.huv.com/blog |
From: pvm <pvm...@gm...> - 2007-10-30 02:18:27
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Jon Hylands wrote: > > Sounds to me like your USB devices may be drawing too much power together. > Try plugging one of them into a powered USB hub, and see if the same thing > happens... > Hmm, I tried some things today and I don't think it is a power issue purse. I took an un-powered hub and connected it to the USB off a GPStix put two adapters on that and left a third adapter plugged into the port off the 24-pin connector. So with three adapters attached and no additional power beyond the gumstix everything worked fine. It is definetly loading the ohci-hcd module that is causing the reset. If I remove the ohci-hcd line from /etc/modules I can boot fine with the devices pugged in. Then when I modprobe ohci-hcd a reset happens. I was looking through the ohci-hcd driver code and there is an option in there "distrust_firmware" (has something to do with the over current signals) which I tried and it makes things work about 50% of the time. Anyone else out there that has 24pin USB working experience the same problem? Thanks, -Pete -- View this message in context: http://www.nabble.com/Never-Ending-Boot-Loop-w--2-USB-ports...-tf4700744.html#a13481317 Sent from the Gumstix mailing list archive at Nabble.com. |
From: Dave H. <dhy...@gm...> - 2007-10-30 03:04:45
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Hi Pete, > Hmm, I tried some things today and I don't think it is a power issue purse. > I took an un-powered hub and connected it to the USB off a GPStix put two > adapters on that and left a third adapter plugged into the port off the > 24-pin connector. So with three adapters attached and no additional power > beyond the gumstix everything worked fine. > > It is definetly loading the ohci-hcd module that is causing the reset. If I > remove the ohci-hcd line from /etc/modules I can boot fine with the devices > pugged in. Then when I modprobe ohci-hcd a reset happens. I was looking > through the ohci-hcd driver code and there is an option in there > "distrust_firmware" (has something to do with the over current signals) > which I tried and it makes things work about 50% of the time. Anyone else > out there that has 24pin USB working experience the same problem? The wifi modules won't draw any significant power until they're initialized, which occurs when you install the ohci-hcd module. -- Dave Hylands Vancouver, BC, Canada http://www.DaveHylands.com/ |
From: pvm <pvm...@gm...> - 2007-10-30 04:01:43
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Dave Hylands wrote: > > The wifi modules won't draw any significant power until they're > initialized, which occurs when you install the ohci-hcd module. > So off hand does anyone know of a way that I can enable one USB port at a time so as to avoid going over the 1 amp limit of the power adapter? -Pete -- View this message in context: http://www.nabble.com/Never-Ending-Boot-Loop-w--2-USB-ports...-tf4700744.html#a13482134 Sent from the Gumstix mailing list archive at Nabble.com. |
From: Dave H. <dhy...@gm...> - 2007-10-30 05:27:10
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Hi Pete, > > The wifi modules won't draw any significant power until they're > > initialized, which occurs when you install the ohci-hcd module. > > So off hand does anyone know of a way that I can enable one USB port at a > time so as to avoid going over the 1 amp limit of the power adapter? Even if you could, as soon as they both start transmitting at the same time you'll be in the same situation. You can prove it's a power issue by using a powered hub (assuming the powered hub can deal with the 1A of current). If the problem goes away, then you know it's a power issue. -- Dave Hylands Vancouver, BC, Canada http://www.DaveHylands.com/ |
From: pvm <pvm...@gm...> - 2007-10-30 13:19:09
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Dave Hylands wrote: > > You can prove it's a power issue by using a powered hub (assuming the > powered hub can deal with the 1A of current). If the problem goes > away, then you know it's a power issue. > like I said, I used an un-powered hub and the issue went away so I think it has to do with hardware/software and not power. I even had 3 dongles attached w/o issue and w/o any extra power source. Has anyone else noticed that sometimes when you wiggle the usb plug the wrong way it restarts as well. Possibly the two issues are related. -Pete -- View this message in context: http://www.nabble.com/Never-Ending-Boot-Loop-w--2-USB-ports...-tf4700744.html#a13488282 Sent from the Gumstix mailing list archive at Nabble.com. |
From: Dave H. <dhy...@gm...> - 2007-10-30 14:15:31
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Hi Pete, > > You can prove it's a power issue by using a powered hub (assuming the > > powered hub can deal with the 1A of current). If the problem goes > > away, then you know it's a power issue. > > > > like I said, I used an un-powered hub and the issue went away so I think it > has to do with hardware/software and not power. I even had 3 dongles > attached w/o issue and w/o any extra power source. And like I said, you didn't really demonstrate anything since the wifi modules will remain powered down until the ohci-hcd tells them to initialize. -- Dave Hylands Vancouver, BC, Canada http://www.DaveHylands.com/ |
From: pvm <pvm...@gm...> - 2007-10-31 01:32:14
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Dave Hylands wrote: > >> like I said, I used an un-powered hub and the issue went away so I think >> it >> has to do with hardware/software and not power. I even had 3 dongles >> attached w/o issue and w/o any extra power source. > > And like I said, you didn't really demonstrate anything since the wifi > modules will remain powered down until the ohci-hcd tells them to > initialize. > I did load the ohci-hcd module. sorry if I was unclear on that. they were all powered up at once. No external power. I was transmitting and recieveing on two of the three. -- View this message in context: http://www.nabble.com/Never-Ending-Boot-Loop-w--2-USB-ports...-tf4700744.html#a13501339 Sent from the Gumstix mailing list archive at Nabble.com. |
From: Dave H. <dhy...@gm...> - 2007-10-31 01:41:45
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Hi, > I did load the ohci-hcd module. sorry if I was unclear on that. they were > all powered up at once. No external power. I was transmitting and > recieveing on two of the three. Ok - sorry about that. So lets clarify what works and doesn't work. With an unpowered hub you connect 2 wifi dongles to the unpowered hub and everything works. If you plug the 2 dongles directly into the gumstix (presumably using one on the console-vx and one on the 24-pin port), then you get continuous resets? When you use the unpowered hub, does it work equally well on both ports on the gumstix? -- Dave Hylands Vancouver, BC, Canada http://www.DaveHylands.com/ |