Synapse 4 gets stuck at detecting device | Razer Insider
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Question

Synapse 4 gets stuck at detecting device

  • March 19, 2025
  • 3 replies
  • 565 views

When I try to install/add a new device to Synapse 4, the process gets stuck at “Detecting device”.

I have Synapse v4.0.86.2503071049 installed.

 

This same thing happened with 3 different mice:

  • Basilisk V3 X Hyperspeed
  • Basilisk Ultimate
  • Basilisk V3 Pro

They have been tested on 4 different computers (one notebook with Win11, 3 desktops with Win10), with different USB connectors. The result is the same.

 

All 3 mice are detected correctly within Windows, so their basic functions work.

 

Only the default Windows Defender is used, and RazerAppEngine is allowed through the firewall.

 

The workaround “solution” is that I have to install Synapse 3 first. Synapse 3 correctly detects and installs the required mice settings. Then I upgrade to Synapse 4, and the mice now appear correctly in Synapse 4 as well. This worked for all 3 mice.

 

So with this workaround all 3 mice can be used (and apparently they do not have any hardware issues). But this is definitely not the expected behaviour from Synapse 4.

This seem to be a  software bug, please fix.

3 Replies

.Darkstar
  • Insider Mini
  • April 29, 2025

I have the same problem with my Razer Kraken V4. Funnily enough, connecting the headset to both the 2.4GHz dongle and Bluetooth 'fixes' the problem.

 


  • Insider Mini
  • April 30, 2025

Did you tried to log out and in to your synapse? I had this kind of issue too. 
I used the “trouble shooting software” from Razer

Now I am stuck at the Point where my headset profile isnt synching the game-mode for my games. 


  • Insider Mini
  • July 17, 2025

Synapse 4 too Buggy to install. FIX OR SCRAP!