AT&T Galaxy S8 USB-C Charging - No Fast Charge??

[Talderon]

Hey, I just got my S8+ over the weekend and am at work where I have a Laptop/Docking Station with a USB-C port (not USB to USB-C, a USB-C to USB-C) and every time I plug in my phone, it starts with Fast Charging and then just goes to a SLOW SLOW charge.

No matter what I set in the USB settings it will not keep it on Fast Charge mode. I have installed the latest drivers from Sansung, but nothing is helping. Any ideas?

Laptop: Latitude 7480
Docking Station: Dell Thunderbolt Dock - TB16
OS: Windows 10 - Fully updated (non preview build)

Thanks all!

edit:Adding additional information

First off, thanks for the answers and suggestions. Here is some additional information that you asked for.

• Laptop has USB-3.1
• I am not using the original Cable as I am using a USB-C to USB-C cable tat did not come with the phone.
• With the Wall Charger, it does Fast Charge
• USB Settings is set to Charge Only
• I will have to go to my truck to get the original cable, and will test with that

 

[Aquila]

Is the USB C port on the laptop USB 2, USB 3 or USB 3.1?

 

[Aquila]

Also, are you using the cable that came with the phone or another one?

 

[T22rmh]

If you're not using the original charger and cable then fast charging might not work.

 

[Golfdriver97]

Does it fast charge without the docking station?

 

[Aquila]

Also, is the device set to transfer files or just to charge?

 

[tengtengvn]

Check the port. It has to support Power Delivery for fast charge to work.

 

[Jason Fournier1]

I don't think you can fast charge from a computer. Needs to be a charger that supports QC 2.0 or Fast Charge

 

[Talderon]

This is a real bummer. Friends here have the Google Pixel phones and they have no issues with the fast charging, but with Samsung, it seems like it was an after thought to put USB-C in there and then cripple it.

I watch my friends phone connected to my laptop (USB-C) charge from 30% to 80% in minutes.

 

[Almeuit]

This is a real bummer. Friends here have the Google Pixel phones and they have no issues with the fast charging, but with Samsung, it seems like it was an after thought to put USB-C in there and then cripple it.

I watch my friends phone connected to my laptop (USB-C) charge from 30% to 80% in minutes.

Yeah not sure why their Pixel works but your phone doesn't. If I plug into the Pixel XL charger via brick and USB c cable it fast charges.

 

[Aquila]

Must be PD compatibility?

 

[amyf27]

Not sure what the issue is if the other phones do fast charge. Are those phones using the same cord? Originally thought the laptop power output wasn't strong enough

My s8plus fast charges but I usually have it plugged into a wall end adapter to either a power strip or my car with a car charger adapter. Sometimes usb-c and sometimes micro usb w/usb-c adapter

 

[osubass1]

Do you know how many amps or miliamps that USB - C port on you laptop puts out?

 

[theelite1x87]

I believe the pixel XL and S8 use different fast charge standards. S8 is Qualcomm quick charge 2.0. pixel XL uses the USB c power delivery standards. Your laptop dock probably only supports USB c PD, and not Qualcomm quick charge. This is the issue

 

[Aquila]

I believe the pixel XL and S8 use different fast charge standards. S8 is Qualcomm quick charge 2.0. pixel XL uses the USB c power delivery standards. Your laptop dock probably only supports USB c PD, and not Qualcomm quick charge. This is the issue

If the laptop supported PD it'd be fast charging the phone. It's most likely a USB 2 port with a type c slot and so putting out less wattage than QC 2 wants.

 

[GizmoEV]

When using the dedicated USB-C charger that came with my Microsoft Lumia 950XL the S8+ charges at the same rate as charging from a 2.4A USB charging brick. The Lumia 950XL charges at the full 3A of the dedicated USB-C charger so Samsung definitely didn't build in the higher current rate of USB-C. :-(

 

[Golfdriver97]

A simple test for USB 2 or 3 should be to push a very large file and use a stopwatch. USB 3 will finish the file in about a third of the time as 2.

 

[anon(7901790)]

Check the specs on your laptop and check the power output of your USB ports.

Not all devices that have USB-C ports implement full USB-C specs.

P.S.

Here are the USB specs for a Latitude 7480

USB
• Two USB 3.0
• One USB 3.0 with PowerShare
• One DisplayPort over USB Type-C (optional Thunderbolt 3)

Your USB-C is for audio/video. You're not going to get fast charging from any of your USB ports.

 

[Jaycemiskel]

Yeah not sure why their Pixel works but your phone doesn't. If I plug into the Pixel XL charger via brick and USB c cable it fast charges.

Does it still charge quickly with the screen on too? Thinking about switching to USB PD instead of adaptive fast charging for this reason.

 

[Almeuit]

Does it still charge quickly with the screen on too? Thinking about switching to USB PD instead of adaptive fast charging for this reason.

Not sure haven't tried.