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USB Device Problem?
I continue to get the following message regarding a USB device:
--------------------------- This device can perform faster. This USB device can perform faster if you connect it to a HI-Speed USB 2.0 Port. For a list of available ports, click below. ---------------------------------- I click below and it shows my USB2 ports, but no where does it tell me the device that it is referring to! How can I determine the device in question? I have an 8 port USB2 Controller. All my USB devices are plugged into it. All my devices work, but I keep getting this message. If the message would identify the device it has a problem with, then I could research it. I checked in Device Manager and the port is listed as ""Intel(R) 82801EB USB2 Enhanced Host Controller 24DD". Then message is random and does not come up all the time, but every now and then - about twice a day. Any insights are appreciated. charliec |
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USB Device Problem?
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#3
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USB Device Problem?
Yousuf Khan wrote:
On 24/08/2011 4:53 PM, wrote: I continue to get the following message regarding a USB device: --------------------------- This device can perform faster. This USB device can perform faster if you connect it to a HI-Speed USB 2.0 Port. For a list of available ports, click below. ---------------------------------- I click below and it shows my USB2 ports, but no where does it tell me the device that it is referring to! How can I determine the device in question? I have an 8 port USB2 Controller. All my USB devices are plugged into it. All my devices work, but I keep getting this message. If the message would identify the device it has a problem with, then I could research it. I checked in Device Manager and the port is listed as ""Intel(R) 82801EB USB2 Enhanced Host Controller 24DD". Then message is random and does not come up all the time, but every now and then - about twice a day. Any insights are appreciated. charliec Your 8-port (do you really mean 7-port?) USB hub is your problem. Hubs are terribly unreliable, it's better to attach devices directly to a USB port on the computer rather than through hubs. Hubs are okay for a few low-priority devices that don't really require high speeds, such as keyboards and mice and stuff. But you should try to attach storage devices like flash drives and hard drives directly to the computer on their own separate ports. Yousuf Khan He's referring to the ICH5 Southbridge of his motherboard, and the logic block inside there associated with USB2. That is the Intel(R) 82801EB USB2 Enhanced Host Controller 24DD that controls USB2 operation on up to eight USB connectors on the motherboard. And I don't have a clue why it would be doing that, unless there are USB bus resets, followed by an incorrect negotiation. It still implies a hardware malfunction, as the software and hardware would be attempting to run at USB2 rates, but for whatever reason, the attempt fails and the hardware connected to the port ends up at USB 1.1 rates. So you'd have a bus reset (which is a normal part of the protocol, but needs an event to kick it off), followed by a failed negotiation. Even if you had a copy of UVCVIEW or equivalent, I doubt it would tell you anything. There was at least one motherboard, that had a "drive strength" setting in the BIOS for the USB ports. Changing that, affects the current flow in USB2 mode. But such a setting hasn't been made available in years, implying tuning it is not necessary. On the motherboard I spotted that setting on, the hardware never needed any adjustment of that value, and worked as well as any other motherboard with USB2 I've got. I'd be more concerned, if a USB2 PCI card was added to the PC, and the symptoms continued. Using a USB2 PCI card, allows testing with another USB chip. If it cures the problem, then you'd know there was something about the motherboard and its ICH5, which was at fault. Since the ICH5 has the "latchup failure" problem associated with the USB ports, I'd insert and use a USB2 PCI card anyway, just to protect the motherboard. It would be hard to find a nice replacement motherboard, if the ICH5 burns up. (ICH5 after failure related to USB ports... That's a burn mark.) http://onfinite.com/libraries/179057/2ea.jpg Paul |
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USB Device Problem?
On Thu, 25 Aug 2011 00:16:08 -0400, Paul wrote:
Yousuf Khan wrote: On 24/08/2011 4:53 PM, wrote: I continue to get the following message regarding a USB device: --------------------------- This device can perform faster. This USB device can perform faster if you connect it to a HI-Speed USB 2.0 Port. For a list of available ports, click below. ---------------------------------- I click below and it shows my USB2 ports, but no where does it tell me the device that it is referring to! How can I determine the device in question? I have an 8 port USB2 Controller. All my USB devices are plugged into it. All my devices work, but I keep getting this message. If the message would identify the device it has a problem with, then I could research it. I checked in Device Manager and the port is listed as ""Intel(R) 82801EB USB2 Enhanced Host Controller 24DD". Then message is random and does not come up all the time, but every now and then - about twice a day. Any insights are appreciated. charliec Your 8-port (do you really mean 7-port?) USB hub is your problem. Hubs are terribly unreliable, it's better to attach devices directly to a USB port on the computer rather than through hubs. Hubs are okay for a few low-priority devices that don't really require high speeds, such as keyboards and mice and stuff. But you should try to attach storage devices like flash drives and hard drives directly to the computer on their own separate ports. Yousuf Khan He's referring to the ICH5 Southbridge of his motherboard, and the logic block inside there associated with USB2. That is the Intel(R) 82801EB USB2 Enhanced Host Controller 24DD that controls USB2 operation on up to eight USB connectors on the motherboard. And I don't have a clue why it would be doing that, unless there are USB bus resets, followed by an incorrect negotiation. It still implies a hardware malfunction, as the software and hardware would be attempting to run at USB2 rates, but for whatever reason, the attempt fails and the hardware connected to the port ends up at USB 1.1 rates. So you'd have a bus reset (which is a normal part of the protocol, but needs an event to kick it off), followed by a failed negotiation. Even if you had a copy of UVCVIEW or equivalent, I doubt it would tell you anything. There was at least one motherboard, that had a "drive strength" setting in the BIOS for the USB ports. Changing that, affects the current flow in USB2 mode. But such a setting hasn't been made available in years, implying tuning it is not necessary. On the motherboard I spotted that setting on, the hardware never needed any adjustment of that value, and worked as well as any other motherboard with USB2 I've got. I'd be more concerned, if a USB2 PCI card was added to the PC, and the symptoms continued. Using a USB2 PCI card, allows testing with another USB chip. If it cures the problem, then you'd know there was something about the motherboard and its ICH5, which was at fault. Since the ICH5 has the "latchup failure" problem associated with the USB ports, I'd insert and use a USB2 PCI card anyway, just to protect the motherboard. It would be hard to find a nice replacement motherboard, if the ICH5 burns up. (ICH5 after failure related to USB ports... That's a burn mark.) http://onfinite.com/libraries/179057/2ea.jpg Paul Thank you both for your comments/input. I just wish it would tell me which one it is referring to! charliec |
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USB Device Problem?
wrote:
Thank you both for your comments/input. I just wish it would tell me which one it is referring to! charliec You can use a copy of UVCView, to examine what is going on, but I can't promise it will shed any light on the problem. There should be enough information (not printed in plain English) to figure out the current running mode (1.1 or 2.0) of any USB device which is connected directly to the computer. This is from a post I made earlier today. http://groups.google.com/group/micro...n&dmode=source See the part "UVCView is shipped with the Windows Driver Kit", for more info. Paul |
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USB Device Problem?
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USB Device Problem?
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