Inspiron 7548 USB3.0 & Ethernet adapter constantly Disconnecting

Question

I have a Brand new inspiron 7548 WIN8.1 with a recommended dell rj45 to usb3.0 ethernet adapter Immediately and straight out of the box there seems to be an issue with the network adapter  constantly disconnecting and reconnecting .  The network adapter functions ok in the USB 2.0 Port , plug it into USB 3 port and the adapter behaves badly  by disconnecting. There are 2x USB3 on my pc and 1x USB2 .  I tested all 3 ports , the USB2 is stable but both the USB3 are not so the problem lies with the USB3 side of things Turns out after a lot of research that the potential fault lies with the Intel USB 3.0 eXtensible Host Controller Driver . Intel made drivers for this but only for windows 7, for Windows 8 these Intel drivers are not compatible, Microsoft makes the 8.1 drivers and there is an issue . This is affecting a lot of people out there. My reason for posting on here is that I am hoping for a sensible way to resolve this problem, currently dell technical support are not listening to what i say , even after many emails phone conversations and remote sessions , I do not seem to deal with one person , each time I get in touch with a tech support guy who promises me he is taking control of the situation only to have yet another tech guy send me yet another usb3 to rj45 adapter .. so far I have 3 further  adapters  so 4 in total , I don't want any more of these adapters  !!  Further to this  , I have deselected the power management feature in the device manager for the adapter(s) .. no change  i have also purchased a 3rd part adapter which also has the same Realtek USB GBE Family controller chipset as the dell adapter. Same issue  Dell did send me an updated driver for the Realtek USB GBE Family controller on 2 separate  occasions , once updated and tested .. no change Is there anything that can be done ? wifi is not an option

t12mbo · Accepted Answer

You could check device manager for the USB root Hub (xHCI) and also for the device you have connected and if you have the option of power management .. disable it and test to see if it makes a difference.

It has made a small improvement .. but not a total fix

Giupeppe · Answer

i have the same notebook 7548 (i7, ssd256, amdR7M279, 15" UHD).... And the same identic problem with the External HardDisk (toshiba 2,5" 500gb, usb 3.0).

if i connect the HardDisk to usb 3.0 (left or right the pc) the process seems to start normally but after some second (30s maybe) it starts to disconnecting and reconnecting like as a user that plug and unplug the usb cable.

It work perfect in the usb 2.0 and with other usb 3.0 from other notebook.

Giupeppe · Answer

Hi t12mbo and THANKS for your reply.

i try your solution and now the problem it's been solved at 50%, because the right usb 3.0 (close to usb 2.0) work perfect but the left usb 3.0 port (close to hdmi and AC) have always the same problem.

i try to disable the powershar in bios setup but the problem persist.

(NB: one week ago i have reistalled win 8.1 because i hoped to resolve the WIFI problem, but before to do this solution all the usb port work fine, after reinstallation i notice this usb problem!!!

ps: wifi problem persist.... the connection is slow in the norrmal web surfing. but if i use uTorrent\eMule the download is 2Mb\s.. it's very fast! )

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