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| Thread ID: 27942 | 2002-12-07 02:13:00 | USB Hubs | dkeallnz (2670) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 103899 | 2002-12-07 02:13:00 | My computer has two USB outlets. One goes to a USB hub - 4 ports - and the other is free. My Epson Stylus Color will work when connected to the free outlet on the computer but not via the hub. Likewise my Canon scanner. One free outlet, two fussy bit of hardware. The hub is self-powered. Why won't scanner and/or printer work with the hub? | dkeallnz (2670) | ||
| 103900 | 2002-12-07 02:35:00 | A good question. :D Were the printer and scanner installed directly, then the hub added later? It might be worth uninstalling them, and then coldstarting with them connected trough the hub (one at a time). Do they work if the hub is plugged into the other port? I suspect that USB might not yet be a "reliable, stable, standard". Of course, it's not the only thing to do with PCs that's like that. ;-) |
Graham L (2) | ||
| 103901 | 2002-12-07 03:03:00 | Thanks Graham for your prompt reply. I have done most of what you suggest. The problem still exits - both printer and scanner work fine when connected into the computer USB; neither works when plugged into the hub. I have wondered about earthing/shielding problems but have nothing specific to go on. | dkeallnz (2670) | ||
| 103902 | 2002-12-07 03:45:00 | Do you have another USB device that you could plug into the hub to confirm or otherwise that the hub is OK? | Terry Porritt (14) | ||
| 103903 | 2002-12-07 03:50:00 | The are two data rates in USB1.x - 12Mbps and 1.5MBps. You may find your hub is struggling with the high speed (printers, scanners etc) but may perform fine with low speed (keyboards, mice etc) devices. You may need to try a different brand hub. | wuppo (41) | ||
| 103904 | 2002-12-07 04:14:00 | When you say "self powered" do you mean fed from a separate power supply, and not powered from the incoming USB? Manufacturers are not consistent with their terminology. If it does not have an external power supply feeding the hub itself, this will likely be your problem. I use a powered 5 port hub, and scanners and printers work fine. Not so on a non powered hub. |
godfather (25) | ||
| 103905 | 2002-12-07 21:35:00 | Yes, I have done that. My IntelliEye mouse works fine on all hub ports. Thanks Terry |
dkeallnz (2670) | ||
| 103906 | 2002-12-07 21:36:00 | Thanks Wuppo. This had not occurred to me. I will enquire further. | dkeallnz (2670) | ||
| 103907 | 2002-12-07 21:38:00 | My hub has an external power supply. Wuppo's point about different USB1 speeds may be the key. Thanks | dkeallnz (2670) | ||
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