So I have a 100Mbps internet connection , which when connected to wirelessly delivers the full speed. However when connected to my laptop through an ethernet adaptor , I dont get more the 6Mbps . On my other device which has an ethernet port it also gives the full 100Mbps . This made me think that maybe the adapter was at fault . However on checking it seems that it is configure to 100 Mbps full duplex as shown in the image .Any ideas as to what could be wrong ?
EDIT:
lsusb -t details -
Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 10000M /: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M |__ Port 1: Dev 2, If 0, Class=Vendor Specific Class, Driver=rtsx_usb, 480M |__ Port 2: Dev 3, If 0, Class=Hub, Driver=hub/4p, 480M |__ Port 1: Dev 4, If 1, Class=Wireless, Driver=btusb, 12M |__ Port 1: Dev 4, If 0, Class=Wireless, Driver=btusb, 12M |__ Port 2: Dev 5, If 0, Class=Video, Driver=uvcvideo, 480M |__ Port 2: Dev 5, If 1, Class=Video, Driver=uvcvideo, 480M |__ Port 3: Dev 6, If 0, Class=Vendor Specific Class, Driver=, 12M /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 10000M /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 480M |__ Port 3: Dev 2, If 0, Class=, Driver=dm9601, 12M |__ Port 4: Dev 3, If 1, Class=Human Interface Device, Driver=usbhid, 12M |__ Port 4: Dev 3, If 0, Class=Human Interface Device, Driver=usbhid, 12M8
1 Answer
First level of fault finding:
- Disturbance sources just beside the cable?
- Any visible damage on cables?
- How about the connectors?
- Replace cable regardless (there might be INVISIBLE damage)
- Network adapters ok?
Note that a shielded cable is similar to a water hose; you cannot bend it beyond a certain limit (not very tight bends) without causing transmission loss or even permanent damage. Actual smallest bend depends on cable make and type.
Please also keep in mind the difference between
- Mega BITS per second (Mbps) and
- Mega BYTES per second (MBps)
Sanity: Mbps-numbers are about 10 times higher than MBps; so 6MBps is approximately 60Mbps.
General electric fault: when just one combination shows the symptom:
An adapter (or whatever) may be "weak" in such way that when connected to a specific device that requires a strong mating, it fails to deliver the expected result (at any level; showing limited, intermittent, random function or full failure).
The EXACT cause for such situations may vary quite dramatically.
In this case one might consider either or both of the devices faulty.
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