Synapse 4 Devices Not Detected on Startup | Razer Insider
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Synapse 4 Devices Not Detected on Startup

  • August 8, 2025
  • 86 replies
  • 4094 views

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86 Replies

Stirick
  • Insider Mini
  • August 10, 2025

 

Plus 1 here same issue hope it gets fixed soon. 


Ozzyyyy18
  • Insider Mini
  • August 10, 2025

Copy and past this:

"C:\Program Files\Razer\RazerAppEngine\RazerAppEngine.exe" --ur-params=apps=synapse --launch-force-hidden=synapse

 

Then check it out because it tends to add spaces and you need to remove them. It works 100%, I've tested it on two computers. 

Yes exactly I C/P  but sigh  same no auto loading. don't know if other configurations in my system blocking this  string value.


Gizbern75
  • Insider Mini
  • August 10, 2025

So... same trash here Version 4.0.86.2508050339

Moved from Synapse 3 because it was so terrible and now this…

Nice Hardware with unusable buggy software… Never again Razer !


Noah1964
  • Insider Mini
  • August 10, 2025

@XatheX your solution worked for me. Thank you so much. hopefully the next update addresses this problem. 


Ozzyyyy18
  • Insider Mini
  • August 10, 2025

@Ozzyyyy18 It works. It just has to be exactly like the one in the picture, including the " and without any extra spaces.

it is like this on my regedit entry but not working 


PiPoLiNiO
  • Insider Mini
  • August 10, 2025

@Ozzyyyy18 Because you did it wrong. You didn't disable autostart in the app. That's why it's not working for you. 


PsiQss
  • Insider Mini
  • August 10, 2025

Okay, so turns out my previous “fix” with Synapse repair didn’t really work all the way - after pc restart, the devices still don’t load automatically. But at least now I can force load them by manually starting Synapse - prior to using repair, they wouldn’t load at all.

Has anyone found a fix or workaround for the Tartarus D-Pad bindings not working?


Ozzyyyy18
  • Insider Mini
  • August 10, 2025

@Ozzyyyy18 Because you did it wrong. You didn't disable autostart in the app. That's why it's not working for you. 

appreciate your patience for replying and helping. I did actually (unchecked the AutoStart on synapse apps) as advised. eventually I back to synapse 3 all works fine, maybe stay on this version until synapse 4 back to normal 


Hrodric2
  • Insider Mini
  • August 10, 2025

Same problem here


  • Insider Mini
  • August 10, 2025

Razer on Reddit be like “create a ticked”.. No man, it's a global issue, lol...


Stirick
  • Insider Mini
  • August 10, 2025

Tried the fix gets it to start but brings up the whole console and you need to close it guess it automates it .  No difference what is ticked for auto start tried all combos.

  Still need a fix tho.


  • Insider Mini
  • August 10, 2025
I am currently exchanging emails with Razer Support, but it feels like I’m only receiving very generic, template-like responses (such as “send logs” or “reinstall the software”).

Even though I’ve posted on the Insider forums and mentioned that many other users are experiencing the exact same issue, they don’t seem to have any intention of checking or testing it on their end.

This is pretty much every major companies’ standard support method and it’s based on ITIL. You have a 1st level service desk (sometimes remote-only and outsourced) which gets all the hate and acts as first responder - hence the generic templates and answers indicating they’re not really looking into the problem or reading the provided sources.

Only after X amounts of tickets for the same thing it gets escalated to 2nd level and all the related incident tickets are converted to a problem. That’s where things start to get rolling.
Eventually 3rd level will be involved for detailed analysis and developing fixes.

TL;DR - we need to raise as many tickets as possible (in other words spam ‘em) until we get heard and receive attention.


  • Author
  • Insider Mini
  • August 10, 2025
I am currently exchanging emails with Razer Support, but it feels like I’m only receiving very generic, template-like responses (such as “send logs” or “reinstall the software”).

Even though I’ve posted on the Insider forums and mentioned that many other users are experiencing the exact same issue, they don’t seem to have any intention of checking or testing it on their end.

This is pretty much every major companies’ standard support method and it’s based on ITIL. You have a 1st level service desk (sometimes remote-only and outsourced) which gets all the hate and acts as first responder - hence the generic templates and answers indicating they’re not really looking into the problem or reading the provided sources.

Only after X amounts of tickets for the same thing it gets escalated to 2nd level and all the related incident tickets are converted to a problem. That’s where things start to get rolling.
Eventually 3rd level will be involved for detailed analysis and developing fixes.

TL;DR - we need to raise as many tickets as possible (in other words spam ‘em) until we get heard and receive attention.

I understand.
However, after they asked me to send a video recording and I did, I still received a response from the Razer support team with only an Xbox-related temporary workaround.
It seems the first-level support team didn’t check anything at all.
I really can’t understand why the engineer who requested the video recording would review it and then only provide an Xbox-related workaround.
On Reddit, after seeing my post, an engineer sent me a private message, and another engineer from the support team also told me that this issue has already been escalated to the higher-level support team.


Stirick
  • Insider Mini
  • August 10, 2025

The more the noise the more likely it is to get fixed. Peeps make some noise !!! Send in tickets!!!


lostin
  • Insider Mini
  • August 10, 2025

I found a fix that works for now BUT it requires modifying the registry… proceed at your own risk 

  1. Open regedit as administrator and navigate to the following location: Computer\HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
  2. there should be an entry for “RazerAppEngine” with a string like "C:\Program Files\Razer\RazerAppEngine\RazerAppEngine.exe" --url-params=apps=synapse --launch-force-hidden=synapse --autoStart=1 ]
  3. Create a NEW string in this location call it RazerFix
  4. Enter the string "C:\Program Files\Razer\RazerAppEngine\RazerAppEngine.exe" --url-params=apps=synapse --launch-force-hidden=synapse ] (no brackets[])
  5. Open Synapse go to settings and turn OFF run at startup completely, the new string will do it for you 
  6. restart and see if it worked

If this doesn’t work for you you can just delete the key you created and no harm will be done.

I don’t really know why this works but I suspect the “--autoStart=1” stops synapse for loading properly.

I hope this helps!

I had the same issue and your workaround really works! Although I had to delete the previous Razerappengine Entry in registry (because it autostarted all the razer apps) and leave only yours razerFix entry. This work as the application itself should. I wonder (!), is it so hard to implement this easy fix in an update?

Anyway thanks for the tip! ;-)


  • Insider Mini
  • August 10, 2025

The above mentioned workaround perfectly works! The issue why it didn’t work is because  “l” letter was missing in the “url” as a part of the value string. The miracle is then I just added “- - autoStart=1” to the RazerFix string and restarted PC. It also works. Then I just deleted this RazerFix string at all and it works as it should be initially with icon tray minimization and devices connected on startup.


I found a fix that works for now BUT it requires modifying the registry… proceed at your own risk 

  1. Open regedit as administrator and navigate to the following location: Computer\HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
  2. there should be an entry for “RazerAppEngine” with a string like "C:\Program Files\Razer\RazerAppEngine\RazerAppEngine.exe" --url-params=apps=synapse --launch-force-hidden=synapse --autoStart=1 ]
  3. Create a NEW string in this location call it RazerFix
  4. Enter the string "C:\Program Files\Razer\RazerAppEngine\RazerAppEngine.exe" --url-params=apps=synapse --launch-force-hidden=synapse ] (no brackets[])
  5. Open Synapse go to settings and turn OFF run at startup completely, the new string will do it for you 
  6. restart and see if it worked

If this doesn’t work for you you can just delete the key you created and no harm will be done.

I don’t really know why this works but I suspect the “--autoStart=1” stops synapse for loading properly.

I hope this helps!

I had the same issue and your workaround really works! Although I had to delete the previous Razerappengine Entry in registry (because it autostarted all the razer apps) and leave only yours razerFix entry. This work as the application itself should. I wonder (!), is it so hard to implement this easy fix in an update?

Anyway thanks for the tip! ;-)




this works for me deleting the razerappengine entry and adding the string RazerFix solved the issue


Stalkerlp
  • Insider Mini
  • August 10, 2025

I found a fix that works for now BUT it requires modifying the registry… proceed at your own risk 

  1. Open regedit as administrator and navigate to the following location: Computer\HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
  2. there should be an entry for “RazerAppEngine” with a string like "C:\Program Files\Razer\RazerAppEngine\RazerAppEngine.exe" --url-params=apps=synapse --launch-force-hidden=synapse --autoStart=1 ]
  3. Create a NEW string in this location call it RazerFix
  4. Enter the string "C:\Program Files\Razer\RazerAppEngine\RazerAppEngine.exe" --url-params=apps=synapse --launch-force-hidden=synapse ] (no brackets[])
  5. Open Synapse go to settings and turn OFF run at startup completely, the new string will do it for you 
  6. restart and see if it worked

If this doesn’t work for you you can just delete the key you created and no harm will be done.

I don’t really know why this works but I suspect the “--autoStart=1” stops synapse for loading properly.

I hope this helps!

I had the same issue and your workaround really works! Although I had to delete the previous Razerappengine Entry in registry (because it autostarted all the razer apps) and leave only yours razerFix entry. This work as the application itself should. I wonder (!), is it so hard to implement this easy fix in an update?

Anyway thanks for the tip! ;-)




this works for me deleting the razerappengine entry and adding the string RazerFix solved the issue

this is work for flawlessly

ty man

 

 

 

 


  • Insider Mini
  • August 10, 2025

This is the first time I've started my computer since yesterday. Everything is the same as yesterday. The devices didn't get detected. Then I restarted it, and suddenly everything started getting detected. And now it's being detected... It's very strange.


  • Author
  • Insider Mini
  • August 10, 2025

Razer Support is truly a mess.

Every single time—every single day—it’s the same thing: “Thank you for providing the details. To proceed, please share the additional information below.”

What on earth is this? I’ve never seen such a ridiculous support system before.

I’ve sent the information multiple times, recorded and sent videos, and even told you to check this post, yet the next day I get the exact same reply: “Thank you for providing the details. To proceed, please share the additional information below…”

Is this just a macro response? I’m starting to doubt whether you’re even working on the issue.

You’re not a small company, yet this is absolutely the worst.


  • Insider Mini
  • August 10, 2025

...

Every single time—every single day—it’s the same thing: “Thank you for providing the details. To proceed, please share the additional information below.”

[..}

See my answer above, it’s all systematic (ITIL).


  • Insider Mini
  • August 10, 2025

I believe Razer fixed it. Mine is working 


  • Insider Mini
  • August 10, 2025

The error also comes with  razerappengine can’t shut down and has to force close during shutdown for me.


  • Insider Mini
  • August 10, 2025

By the way, when I reboot (not shut down), I always have the app crash: GameManagerService3.exe . And this has always been the case since the RS4 was installed.


  • Author
  • Insider Mini
  • August 10, 2025

...

Every single time—every single day—it’s the same thing: “Thank you for providing the details. To proceed, please share the additional information below.”

[..}

See my answer above, it’s all systematic (ITIL).

If Razer support were truly systematic, there would be no need for 3–4 different engineers to repeat the exact same thing.
Normally, if the first-line support team can’t resolve the issue, they escalate it to the R&D team.
And yet, I’ve received the same response multiple times regarding the same support ticket.

I’m not submitting new requests — it’s the same ticket number, over and over:
Information request → I provide the information → no reply → a different engineer appears → requests the same information again → I provide it again → no reply → another engineer appears…

Does this really seem systematic to you???


This kind of repetition is not how ITIL is supposed to work