# Kernel module btusb -- cpu usage UB 19.04

**URL:** <https://discourse.ubuntubudgie.org/t/kernel-module-btusb-cpu-usage-ub-19-04/2358>\
**Category:** General\
**Created:** [August 17, 2019, 2:33pm UTC](https://discourse.ubuntubudgie.org/t/kernel-module-btusb-cpu-usage-ub-19-04/2358 "2019-08-17T14:33:17Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![makitso](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.ubuntubudgie.org/makitso/32/4961_2.png) [@makitso](https://discourse.ubuntubudgie.org/u/makitso)\
**Post date:** [August 17, 2019, 2:33pm UTC](https://discourse.ubuntubudgie.org/t/kernel-module-btusb-cpu-usage-ub-19-04/2358/1 "2019-08-17T14:33:17Z")

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I am poking around on an older laptop that has higher than expected cpu usage while on battery.  
The laptop has bluetooth turned off. Yet, I see a kernel module btusb using cpu. Any easy suggestions other than compiling a kernel? Do you think 19.10 would be any better?

![image](https://canada1.discourse-cdn.com/flex035/uploads/ubuntubudgie/original/2X/7/7f720f895e41c692d7a9d2780000157fbb04f0b1.png)

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**Author:** ![fossfreedom](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.ubuntubudgie.org/fossfreedom/32/1405_2.png) [@fossfreedom](https://discourse.ubuntubudgie.org/u/fossfreedom)\
**Post date:** [August 17, 2019, 2:49pm UTC](https://discourse.ubuntubudgie.org/t/kernel-module-btusb-cpu-usage-ub-19-04/2358/2 "2019-08-17T14:49:39Z")

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If you dont need bluetooth you should be able to blacklist the kernel module

```
sudo nano /etc/modprobe.d/blacklist.conf

```

Add

```
blacklist btusb

```

At the bottom. Save

Then update the kernel

```
 sudo update-initramfs -u

```

Reboot.

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<div class="post-metadata">

**Author:** ![makitso](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.ubuntubudgie.org/makitso/32/4961_2.png) [@makitso](https://discourse.ubuntubudgie.org/u/makitso)\
**Post date:** [August 17, 2019, 3:03pm UTC](https://discourse.ubuntubudgie.org/t/kernel-module-btusb-cpu-usage-ub-19-04/2358/3 "2019-08-17T15:03:48Z")

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Hmm … followed your suggestion, running powertop, still listed under Device stats??

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**Author:** ![fossfreedom](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.ubuntubudgie.org/fossfreedom/32/1405_2.png) [@fossfreedom](https://discourse.ubuntubudgie.org/u/fossfreedom)\
**Post date:** [August 17, 2019, 3:06pm UTC](https://discourse.ubuntubudgie.org/t/kernel-module-btusb-cpu-usage-ub-19-04/2358/4 "2019-08-17T15:06:09Z")

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Try also blacklisting the bluetooth module. They both might have to be blacklisted together

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**Author:** ![makitso](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.ubuntubudgie.org/makitso/32/4961_2.png) [@makitso](https://discourse.ubuntubudgie.org/u/makitso)\
**Post date:** [August 17, 2019, 3:23pm UTC](https://discourse.ubuntubudgie.org/t/kernel-module-btusb-cpu-usage-ub-19-04/2358/5 "2019-08-17T15:23:03Z")

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Nope, that did not do it ☹ Interesting that it does not show up under 19.10, instead it lists Radio Device: iwlwifi as 100%