USB device only connects via hub
up vote
4
down vote
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When I connect a USB 2.0 Lumidigm fingerprint sensor to any of a PC's USB 2.0 ports, both Windows and Linux won't detect it. It doesn't try to install any drivers, and doesn't detect a hardware change. Windows Device Manager and Linux lsusb don't detect it.
Strangely, whenever I connect the device to an unpowered USB hub and I connect the hub to the PC, it gets detected and works perfectly.
The same thing happens with all other USB ports on the PC (there are 4).
Now my question is: How can I fix this problem? The fingerprint reader must be plugged in directly, without the hub.
Some additional questions that might be interesting:
- How does Windows detect that a USB device is plugged in?
- How will Windows react differently to a USB hub instead of a regular device?
Everything is using USB 2.0
Edit 1:
I have tried to test it on other PC's, and every PC of the same model has that problem. On all of the other PC's and my own this problem doesn't occur. Using an USB extension cord doesn't change anything about the results.
Edit 2:
The fingerprint sensor only has a USB mini input. I use a USB mini to USB A cable to connect the device with the PC. This cable works with other devices and the same PC so it cannot be that the USB connector pads
usb device-manager usb-2 usb-hub
asked Nov 26 at 10:36
marijnr
9014
add a comment |
up vote
4
down vote
favorite
When I connect a USB 2.0 Lumidigm fingerprint sensor to any of a PC's USB 2.0 ports, both Windows and Linux won't detect it. It doesn't try to install any drivers, and doesn't detect a hardware change. Windows Device Manager and Linux lsusb don't detect it.
Strangely, whenever I connect the device to an unpowered USB hub and I connect the hub to the PC, it gets detected and works perfectly.
The same thing happens with all other USB ports on the PC (there are 4).
Now my question is: How can I fix this problem? The fingerprint reader must be plugged in directly, without the hub.
Some additional questions that might be interesting:
- How does Windows detect that a USB device is plugged in?
- How will Windows react differently to a USB hub instead of a regular device?
Everything is using USB 2.0
Edit 1:
I have tried to test it on other PC's, and every PC of the same model has that problem. On all of the other PC's and my own this problem doesn't occur. Using an USB extension cord doesn't change anything about the results.
Edit 2:
The fingerprint sensor only has a USB mini input. I use a USB mini to USB A cable to connect the device with the PC. This cable works with other devices and the same PC so it cannot be that the USB connector pads
usb device-manager usb-2 usb-hub
asked Nov 26 at 10:36
marijnr
9014
Is this a powered hub?
– Eugen Rieck
Nov 26 at 10:38
Is the USB connector (directly on the PC) USB 3.0? I have seen such things with Gemalto Hardware.
– Eugen Rieck
Nov 26 at 10:41
Try a different PC (not installing the driver just if it sees the device) and tell us the vendor. Gemalto devices are sometimes quite picky and don't accept all USB connectors.
– Eugen Rieck
Nov 26 at 10:45
One experiment to find out if this is a Windows problem or a hardware problem would be to boot Linux, e.g. from an USB stick, and see what happens when you plug it in (look atdmesgandlsusb).
– dirkt
Nov 26 at 11:30
Please, when replying to a question in Comments, don't Comment yourself; instead, update the original question post by clicking on edit, so everyone can see it. The Comments section is already so long, some comments are hidden. Please click on the grey (x) after each of your comments, once you have answered them in the original post, to clear the redundant Comments away.
– K7AAY
Nov 27 at 19:09
add a comment |
up vote
4
down vote
favorite
up vote
4
down vote
favorite
When I connect a USB 2.0 Lumidigm fingerprint sensor to any of a PC's USB 2.0 ports, both Windows and Linux won't detect it. It doesn't try to install any drivers, and doesn't detect a hardware change. Windows Device Manager and Linux lsusb don't detect it.
Strangely, whenever I connect the device to an unpowered USB hub and I connect the hub to the PC, it gets detected and works perfectly.
The same thing happens with all other USB ports on the PC (there are 4).
Now my question is: How can I fix this problem? The fingerprint reader must be plugged in directly, without the hub.
Some additional questions that might be interesting:
- How does Windows detect that a USB device is plugged in?
- How will Windows react differently to a USB hub instead of a regular device?
Everything is using USB 2.0
Edit 1:
I have tried to test it on other PC's, and every PC of the same model has that problem. On all of the other PC's and my own this problem doesn't occur. Using an USB extension cord doesn't change anything about the results.
Edit 2:
The fingerprint sensor only has a USB mini input. I use a USB mini to USB A cable to connect the device with the PC. This cable works with other devices and the same PC so it cannot be that the USB connector pads
usb device-manager usb-2 usb-hub
asked Nov 26 at 10:36
marijnr
9014
When I connect a USB 2.0 Lumidigm fingerprint sensor to any of a PC's USB 2.0 ports, both Windows and Linux won't detect it. It doesn't try to install any drivers, and doesn't detect a hardware change. Windows Device Manager and Linux lsusb don't detect it.
Strangely, whenever I connect the device to an unpowered USB hub and I connect the hub to the PC, it gets detected and works perfectly.
The same thing happens with all other USB ports on the PC (there are 4).
Now my question is: How can I fix this problem? The fingerprint reader must be plugged in directly, without the hub.
Some additional questions that might be interesting:
- How does Windows detect that a USB device is plugged in?
- How will Windows react differently to a USB hub instead of a regular device?
Everything is using USB 2.0
Edit 1:
I have tried to test it on other PC's, and every PC of the same model has that problem. On all of the other PC's and my own this problem doesn't occur. Using an USB extension cord doesn't change anything about the results.
Edit 2:
The fingerprint sensor only has a USB mini input. I use a USB mini to USB A cable to connect the device with the PC. This cable works with other devices and the same PC so it cannot be that the USB connector pads
usb device-manager usb-2 usb-hub
usb device-manager usb-2 usb-hub
asked Nov 26 at 10:36
marijnr
9014
asked Nov 26 at 10:36
marijnr
9014
edited Nov 29 at 10:51
asked Nov 26 at 10:36
marijnr
9014
asked Nov 26 at 10:36
marijnr
9014
asked Nov 26 at 10:36
marijnr
9014
9014
Is this a powered hub?
– Eugen Rieck
Nov 26 at 10:38
Is the USB connector (directly on the PC) USB 3.0? I have seen such things with Gemalto Hardware.
– Eugen Rieck
Nov 26 at 10:41
Try a different PC (not installing the driver just if it sees the device) and tell us the vendor. Gemalto devices are sometimes quite picky and don't accept all USB connectors.
– Eugen Rieck
Nov 26 at 10:45
One experiment to find out if this is a Windows problem or a hardware problem would be to boot Linux, e.g. from an USB stick, and see what happens when you plug it in (look atdmesgandlsusb).
– dirkt
Nov 26 at 11:30
Please, when replying to a question in Comments, don't Comment yourself; instead, update the original question post by clicking on edit, so everyone can see it. The Comments section is already so long, some comments are hidden. Please click on the grey (x) after each of your comments, once you have answered them in the original post, to clear the redundant Comments away.
– K7AAY
Nov 27 at 19:09
add a comment |
Is this a powered hub?
– Eugen Rieck
Nov 26 at 10:38
Is the USB connector (directly on the PC) USB 3.0? I have seen such things with Gemalto Hardware.
– Eugen Rieck
Nov 26 at 10:41
Try a different PC (not installing the driver just if it sees the device) and tell us the vendor. Gemalto devices are sometimes quite picky and don't accept all USB connectors.
– Eugen Rieck
Nov 26 at 10:45
One experiment to find out if this is a Windows problem or a hardware problem would be to boot Linux, e.g. from an USB stick, and see what happens when you plug it in (look atdmesgandlsusb).
– dirkt
Nov 26 at 11:30
Please, when replying to a question in Comments, don't Comment yourself; instead, update the original question post by clicking on edit, so everyone can see it. The Comments section is already so long, some comments are hidden. Please click on the grey (x) after each of your comments, once you have answered them in the original post, to clear the redundant Comments away.
– K7AAY
Nov 27 at 19:09
Is this a powered hub?
– Eugen Rieck
Nov 26 at 10:38
Is this a powered hub?
– Eugen Rieck
Nov 26 at 10:38
Is the USB connector (directly on the PC) USB 3.0? I have seen such things with Gemalto Hardware.
– Eugen Rieck
Nov 26 at 10:41
Is the USB connector (directly on the PC) USB 3.0? I have seen such things with Gemalto Hardware.
– Eugen Rieck
Nov 26 at 10:41
Try a different PC (not installing the driver just if it sees the device) and tell us the vendor. Gemalto devices are sometimes quite picky and don't accept all USB connectors.
– Eugen Rieck
Nov 26 at 10:45
Try a different PC (not installing the driver just if it sees the device) and tell us the vendor. Gemalto devices are sometimes quite picky and don't accept all USB connectors.
– Eugen Rieck
Nov 26 at 10:45
One experiment to find out if this is a Windows problem or a hardware problem would be to boot Linux, e.g. from an USB stick, and see what happens when you plug it in (look at
dmesg and lsusb).– dirkt
Nov 26 at 11:30
One experiment to find out if this is a Windows problem or a hardware problem would be to boot Linux, e.g. from an USB stick, and see what happens when you plug it in (look at
dmesg and lsusb).– dirkt
Nov 26 at 11:30
Please, when replying to a question in Comments, don't Comment yourself; instead, update the original question post by clicking on edit, so everyone can see it. The Comments section is already so long, some comments are hidden. Please click on the grey (x) after each of your comments, once you have answered them in the original post, to clear the redundant Comments away.
– K7AAY
Nov 27 at 19:09
Please, when replying to a question in Comments, don't Comment yourself; instead, update the original question post by clicking on edit, so everyone can see it. The Comments section is already so long, some comments are hidden. Please click on the grey (x) after each of your comments, once you have answered them in the original post, to clear the redundant Comments away.
– K7AAY
Nov 27 at 19:09
add a comment |
1 Answer
1
active
oldest
votes
up vote
2
down vote
Looks like the subcontractor who made the USB female connectors on that one model of PC made them short, out of spec. The fingerprint sensor connectors are just a little too short for the connectors on those motherboard and/or chassis ports, but the USB hub connectors are long enough. You verified that by trying the sensor on a different model of PC.
answered Nov 26 at 17:27
K7AAY
3,22221437
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
2
down vote
Looks like the subcontractor who made the USB female connectors on that one model of PC made them short, out of spec. The fingerprint sensor connectors are just a little too short for the connectors on those motherboard and/or chassis ports, but the USB hub connectors are long enough. You verified that by trying the sensor on a different model of PC.
answered Nov 26 at 17:27
K7AAY
3,22221437
add a comment |
up vote
2
down vote
Looks like the subcontractor who made the USB female connectors on that one model of PC made them short, out of spec. The fingerprint sensor connectors are just a little too short for the connectors on those motherboard and/or chassis ports, but the USB hub connectors are long enough. You verified that by trying the sensor on a different model of PC.
answered Nov 26 at 17:27
K7AAY
3,22221437
add a comment |
up vote
2
down vote
up vote
2
down vote
Looks like the subcontractor who made the USB female connectors on that one model of PC made them short, out of spec. The fingerprint sensor connectors are just a little too short for the connectors on those motherboard and/or chassis ports, but the USB hub connectors are long enough. You verified that by trying the sensor on a different model of PC.
answered Nov 26 at 17:27
K7AAY
3,22221437
Looks like the subcontractor who made the USB female connectors on that one model of PC made them short, out of spec. The fingerprint sensor connectors are just a little too short for the connectors on those motherboard and/or chassis ports, but the USB hub connectors are long enough. You verified that by trying the sensor on a different model of PC.
answered Nov 26 at 17:27
K7AAY
3,22221437
edited Nov 27 at 19:11
answered Nov 26 at 17:27
K7AAY
3,22221437
answered Nov 26 at 17:27
K7AAY
3,22221437
answered Nov 26 at 17:27
K7AAY
3,22221437
3,22221437
add a comment |
add a comment |
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Is this a powered hub?
– Eugen Rieck
Nov 26 at 10:38
Is the USB connector (directly on the PC) USB 3.0? I have seen such things with Gemalto Hardware.
– Eugen Rieck
Nov 26 at 10:41
Try a different PC (not installing the driver just if it sees the device) and tell us the vendor. Gemalto devices are sometimes quite picky and don't accept all USB connectors.
– Eugen Rieck
Nov 26 at 10:45
One experiment to find out if this is a Windows problem or a hardware problem would be to boot Linux, e.g. from an USB stick, and see what happens when you plug it in (look at
dmesgandlsusb).– dirkt
Nov 26 at 11:30
Please, when replying to a question in Comments, don't Comment yourself; instead, update the original question post by clicking on edit, so everyone can see it. The Comments section is already so long, some comments are hidden. Please click on the grey (x) after each of your comments, once you have answered them in the original post, to clear the redundant Comments away.
– K7AAY
Nov 27 at 19:09