Bluetooth falls off on Linux 5.4, how to fix it?

Question

linux

Bluetooth on the laptop suddenly falls off, namely the keyboard.

Here are the logs:
Sep 1 20:05:07 andrew-pc kernel: [ 4663.201877] Bluetooth: hci0: No way to reset. Ignoring and continuing
Sep 1 20:05:09 andrew-pc kernel: [ 4665.217889] Bluetooth: hci0: command 0x0401 tx timeout
Sep 1 20:05:09 andrew-pc kernel: [ 4665.217897] Bluetooth: hci0: No way to reset. Ignoring and continuing
Sep 1 20:05:36 andrew-pc acpid: input device has been disconnected, fd 21
Sep 1 20:05:36 andrew-pc acpid: input device has been disconnected, fd 22
Sep 1 20:05:36 andrew-pc acpid: input device has been disconnected, fd 23
Sep 1 20:06:02 andrew-pc kernel: [ 4717.938886] [drm] Reducing the compressed framebuffer size. This may lead to less power savings than a non-reduced-size. Try to increase stolen memory size if available in BIOS.

Restarting the bluetooth service does not help, only a reboot.
Googling led me to a similar topic, possibly related: https://www.reddit.com/r/linuxhardware/comments/fo...

Kernel: 5.4.0-45-generic x86_64
Linux Mint

Has anyone come across?

Answer 1

Restarting the bluetooth service does not help, only a reboot.

sudo modprobe -r btusb; sudo modprobe -r btintel; sudo modprobe btusb; sudo modprobe btintel

Answer 2

So is he going to sleep? Energy saving puts him to sleep.