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Bluetooth mouse lags after 5 seconds of idling

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I have Logitech Master MX 3 that I am connecting over Bluetooth.

I am using Ubuntu 20.04 with Network controller: Intel Corporation Wireless-AC 9260 (rev 29). (output of lspci)

The driver in use is iwlwifi.

The mouse stutters after not being moved for 5 seconds.

However, I have an observation that, when the Blueman - Bluetooth devices applet is open, the lag disappears! As soon as I close that application, it starts again.

I have tried many things like:

  1. btusb.enable_autosuspend=0 in the grub file.
  2. iwlwifi/iwlmvm power management switched off, power scheme 0

are just to list a few.

Kernel version:5.13.0-27-generic x86_64 x86_64 GNU/Linux (uname -romi)
iwlwifi Driver version: 46.4d093a30.0 (lshw -C Network)

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