Black Display when using USB 3.0/3.1

#1 · 08/07/2025, 18:36

Hi,

when I’m trying to connect my Galaxy Tab S10+ to my Windows-Laptop (Dell Inspiron 16 Plus 7620) via USB-C cable (3.0/3.1), it only shows a black Display on my tablet and on my Laptop it says “connection pending”. It works however when im using a normal USB 2.0 cable. That’s why I dont think its because of some program running in the backround or anything else I could change.

I have two cables, one with 5 Gbps and one with 10 Gbps and both dont work and I’m also very sure the cables are ok.

However, when I started using Spacedesk (probably around 3 months ago), I was using the cable with 10 Gbps and it worked a few times, before it didnt. I think it maybe stopped working after a Windows-Update, but I’m not sure.

And before you ask: All drivers and the software are uptodate and I also tried multiple times to restart all devices and to reinstall Spacedesk on the Tablet and the Laptop.

#2 · 09/07/2025, 03:57

Hi @patrick,

For further analysis of the issue, please send us the logs of your server machine by opening the spacedesk Driver console as administrator and clicking on Diagnostics then follow the steps below:

1. Download the DebugView.
2. Check the Diagnostic Collection box.
3. Reproduce the issue e.g. by connecting the spacedesk Viewer app via USB using a USB 3.0/3.1 cable.
4. Uncheck the Diagnostic Collection box.
5. Click “Save All Information” button (this might take a while to finish).
6. Compress/Zip the folder which contains the logs, then attach to your next reply to this post. If the folder exceeds 512kb, you may upload it to Dropbox or Google Drive then include the download link on your next reply.

Thank you.

#3 · 20/08/2025, 05:45

I have a similar problem: my tablet works over a USB 2.0 cable but not over USB 3.0 or 3.1 cables.

Setup
Device: Galaxy Tab S9 Ultra
Host: Desktop PC, Windows 11, USB 3.2 Gen 2 port
History: I used a USB 2.0 cable for a long time until it wore out. I then tried two replacement cables (one USB 3.0 and one USB 3.1).

File transfer: Both the USB 3.0 and USB 3.1 cables transfer files normally at full speed between the tablet and PC.
Secondary-screen apps: SpaceDesk and SuperDisplay work fine when using the USB 2.0 cable, but do not work when using either the USB 3.0 or USB 3.1 cable. On my setup, both apps function correctly over USB 2.0 and Wifi connection.

SpaceDesk shows a black screen when I try to use it over the USB 3.x cable.
SuperDisplay attempts to connect to the tablet as a secondary display but then immediately disconnects.

I have already uninstalled and reinstalled both apps, but the issue persists when using the USB 3.0/3.1 cable. File transfers still work over the USB 3.x cables, so I’m including diagnostic logs from a working USB 2.0 session and a failing USB 3.1 session for comparison.

USB 2.0 log
https://drive.google.com/file/d/15bMuCveGxBFPjeYpnnvBsD9o9T9VTlAp/view?usp=sharing

USB 3.1 log
https://drive.google.com/file/d/1PT_10aEWeTdQub4YG46U9c9yB7Ja1_GP/view?usp=drive_link

#4 · 20/08/2025, 06:31

UPDATE: i tested on another pc which use old version of windows 10, all USB 2.0-3.1 cable and all function work just fine. but not on windows 11

#5 · 20/08/2025, 07:47

Hi @wasit,

Thank you for the additional information and the logs you sent. We’re currently analyzing the logs you’ve sent and we’ll get back to you once we’ve found the cause of the issue. Thanks again.

#6 · 20/08/2025, 07:55

Hi @wasit,

Do you have “Samsung USB Driver for Mobile Phones” installed in your Win11 PC?

#7 · 20/08/2025, 08:35

Quote from spacedesk Renz on 20/08/2025, 07:55

Hi @wasit,

Do you have “Samsung USB Driver for Mobile Phones” installed in your Win11 PC?

No, I haven’t. Do I need to install it?

#8 · 20/08/2025, 09:16

Hi @wasit,

No. There were other cases where the Samsung USB Driver was the cause of the black screen so we just wanted to confirm. We’ll get back to you once we have more findings regarding the issue. Thank you.

#9 · 09/10/2025, 18:02

I’m also having the same issue. It works fine with the USB 2.2 , but it is not working with USB 4.0 cable, I am expecting using 4.0 will reduce the lag

#10 · 10/10/2025, 03:58

Hi @amith28,

please send us the diagnostics of your Windows machine. Open spacedesk Driver Console as administrator and click on Diagnostics then follow the steps below:

1. Download the DebugView.
2. Check the Diagnostic Collection box.
3. Reproduce the issue e.g. by connecting the spacedesk Viewer app via USB 4.0
4. Uncheck the Diagnostic Collection box.
5. Click “Save All Information” button (this might take a while to finish).
6. Compress/Zip the folder which contains the logs, then attach to your next reply to this post. If the folder exceeds 512kb, you may upload it to Dropbox or Google Drive then include the download link on your next reply.