Manjaro Linux运行powertop -c校准后蓝牙无法工作求助

Hey there, let's get your Bluetooth back up and running after that powertop calibration. It's super common for powertop's aggressive power-saving tweaks to accidentally interfere with Bluetooth modules—here's a step-by-step fix tailored for Manjaro:

1. Check and Reset Bluetooth Service #

First, let's make sure the core Bluetooth service is in good shape:

• Run this to check the service's current state:

  systemctl status bluetooth
  

• If you see "inactive (dead)" or error messages, start the service and set it to auto-launch on boot:

  sudo systemctl start bluetooth
  sudo systemctl enable bluetooth
  

2. Revert Powertop's Bluetooth Tunables #

Powertop's calibration might have marked Bluetooth's power management as "bad" or disabled it entirely. Let's fix that:

• Launch powertop in interactive mode:

  powertop
  

• Use arrow keys to switch to the Tunables tab. Look for entries like Runtime PM for bluetooth device or any line referencing your Bluetooth hardware.
• If the entry shows Bad, press Enter to toggle it to Good.
• Alternatively, apply all recommended power tunables (this might fix other minor power issues too):

  sudo powertop --auto-tune
  

3. Override Bluetooth Device Power Sleep Settings #

Sometimes powertop forces the Bluetooth device into deep sleep. Let's override that:

• First, identify your Bluetooth device with lsusb:

  lsusb | grep Bluetooth
  

  You'll get output like this (yours will have a different ID/bus number):

  Bus 001 Device 003: ID 8087:0aaa Intel Corp. Bluetooth 9460/9560 Jefferson Peak (JfP)
  

• Locate the device's power control file (replace 1-3 with your device's bus/device number from the output):

  echo auto | sudo tee /sys/bus/usb/devices/1-3/power/control
  

  This sets the device to use automatic power management instead of being forced off.

4. Disable Autosuspend for the Bluetooth Kernel Module #

The btusb kernel module might have autosuspend enabled, which powertop could have cranked up. Let's disable it:

• Check the current autosuspend value:

  cat /sys/module/btusb/parameters/autosuspend
  

• If it's not 0, set it to 0 temporarily:

  echo 0 | sudo tee /sys/module/btusb/parameters/autosuspend
  

• To make this change permanent, create a modprobe config file:

  sudo nano /etc/modprobe.d/btusb.conf
  

  Add this line to the file:

  options btusb autosuspend=0
  

  Save and exit (press Ctrl+O, then Ctrl+X in nano).

5. Reboot and Verify #

After making these changes, reboot your system:

sudo reboot

Once back up, test Bluetooth with bluetoothctl:

bluetoothctl

Type scan on—if nearby devices start popping up, your Bluetooth is working again!

If you still hit snags, share the output from commands like dmesg | grep Bluetooth or bluetoothctl show—that’ll help narrow down the exact issue.

内容的提问来源于stack exchange，提问作者Henrique Barcelos