Dell Precision 5760: Bluetooth mouse issues

Update:

After hours of trial and error, I tried turning off power saving on some devices in “Device Manager”. I narrowed it down to Thunderbolt(TM) Controllers under "system devices". Although it didn't entirely fix the issue (There's still a minimal delay of 200-300 ms) but it's much better than the 1-2 seconds delay.

I don't know the implications of this so I'd love to hear from tech support if this is okay to do.

This is kind of a workaround so I still expect Dell to get a better understanding of this issue (I saw that many customers had this issue and previous workarounds were discontinued by either Microsoft or Dell/ were introduced back again in newer BIOS versions). I still expect Dell to come up with a solution for this issue.

Update2: 

I have been advised by Dell support to perform the following steps: (copied from the Email)

"

Disable the USB 3.1 power management settings in the Windows Device Manager.

1. Press the Windows + R key on the keyboard.
2. In the run dialog box, type devmgmt.msc and press Enter.
3. In the Device Manager window, expand Universal Serial Bus Controllers.
4. Right-click Intel USB 3.1 eXtensible Host Controller and select Properties.
5. Go to the Power Management tab.
6. Uncheck Allow the computer to turn off this device to save power.
7. Click OK.
8. Close the Device Manager window and restart the computer.

Update (WARNING):

I am warning you from using this workaround as a temporary fix. I experienced extreme battery drain in sleep mode (even after closing the lid) after applying this. I do not recommend using this workaround as it can degrade, or even permanently damage the laptop from excessive heat when encased.

I went back to using the solution I found earlier which is to uncheck the same option for Thunderbolt(TM) Controllers instead of Intel USB 3.1 eXtensible Host Controllers which doesn't seem to have a noticeable effect on battery drain in sleep mode.

I urge Dell to find a permanent solution for this issue.

To prove my point, I'm attaching info from "https://docs.microsoft.com/en-us/windows-hardware/design/device-experiences/bluetooth-power-management-for-modern-standby-platforms". D2 Exit latency to active should be less than 100ms. How those so called "engineers" say 1-2 seconds is "Normal" I'm literally furious.. 

After days of troubleshooting and a few sleepless nights, I received an update from Dell-Care that a 1-2 mouse delay is "normal".

"It is expected behavior caused by device needing to reconnect after Bluetooth controller goes into low power mode (D2). This has been confirmed with Intel as is part of the design protocol and a 1-2 second delay is normal."

I do not accept this. I am disappointed to say the least. My previous laptop (Precision 5520) doesn't have this issue. Any normal human being can't work with a 1-2 mouse delay each 2 seconds of it being idle. I cannot do CAD work with convenience. Gaming is out for sure. And everyday interactions are so annoying, it's like getting electric shocks all day.

I need a permanent fix as soon as possible.

This was suggested but it's an outdated workaround and doesn't work on newer models or BIOS. see picture. I have been literally trying tens of workarounds suggested by Dell support. Nothing worked. I will soon post all solutions that had no effect. I'm literally worn out.

... any luck/updates? just got a precision laptop and am looking to buy a mouse. appreciate you sharing all of your troubleshooting!

Hey there!

Not yet. Have you bought a bluetooth mouse? Did you have the same issue? 

I have received an update from DELL-Cares that engineers will issue a fix in the next BIOS update 1.7.0

Update:

The issue hasn't been solved. Some users with same laptop model and a different CPU managed to solve the issue by disabling power management for the Bluetooth Device. The solution works only for models with i7 11850H CPU. My laptop has a Xeon W-11955M which is lacking power management features.

I'm losing patience and considering replacing the motherboard with i9-11950H CPU. Can anyone confirm whether power management features are supported for that CPU?

Update!

I'm excited to update you that after installing a Windows update released by Microsoft, the issue of the mouse/keyboard delay was completely gone. The update was recently released on 3/22/2022.

Update name:

"March 22, 2022—KB5011543 (OS Builds 19042.1620, 19043.1620, and 19044.1620)"

It's advised to automatically find the Windows update within "check for updates" from startup or search menu.

So, to conclude:

- Update the BIOS to the latest version (decreased Bluetooth delay time)

- Update latest Windows update (completely solved the issue)

I would love other community members to confirm if this solution also worked for them. It's literally a relief to work with 0 delay.

Actually nevermind. I was too fast to judge as the delay was wasn't really fixed. The issue behaves in a strange way that if you connect another device that keeps the Bluetooth awake (Like headphones while playing music), the delay would be gone and that's what made me think it was resolved. (The delay was back when I disconnected the headphones).

They delay decreased after the last BIOS update but it's still persistent.

SAme think hear. I have a 5760 2 years now. LAtely i have thiw issues of delay on Mouse(dell bluetotth mouse ) and keyboard of the laptop. When running the laptop in battery and COOL mode , the mouse pointer goes idle (doesn't move) for a period greater than a second, there is some probability that when I start to move the pointer again it will be frozen