FS#69221 - systemd-udevd high CPU usage when using Intel AX210

Attached to Project: Arch Linux
Opened by Celeste (Coelacanthus) - Tuesday, 05 January 2021, 14:54 GMT
Last edited by Andreas Radke (AndyRTR) - Tuesday, 30 March 2021, 12:15 GMT
Task Type Bug Report
Category Packages: Core
Status Closed
Assigned To No-one
Architecture All
Severity Medium
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 1
Private No

Details

Description:

systemd-udevd high CPU usage when using Intel AX210


Steps to reproduce:

boot on a computer with AX210

issue on Ubuntu: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1890130

We can fix it as ubuntu does https://lists.ubuntu.com/archives/kernel-team/2020-December/115332.html
by backporting the patch20201119113943.13839-1-kiran.k@intel.com/"> https://lore.kernel.org/linux-bluetooth/20201119113943.13839-1-kiran.k@intel.com/ to linux/linux-zen package

This task depends upon

Closed by  Andreas Radke (AndyRTR)
Tuesday, 30 March 2021, 12:15 GMT
Reason for closing:  Fixed
Additional comments about closing:  package linux has been updated to 5.11, the problem is solved
Comment by Celeste (Coelacanthus) - Tuesday, 05 January 2021, 14:56 GMT
oops, link is broken
the last link is20201119113943.13839-1-kiran.k@intel.com/"> https://lore.kernel.org/linux-bluetooth/20201119113943.13839-1-kiran.k@intel.com/
Comment by loqs (loqs) - Thursday, 07 January 2021, 19:48 GMT
@Coelacanthus to clarify you want all five patches from the series [1]?

Flyspray misinterprets lore.kernel.org links as emails due to the @ if you replace it with %40 that seems to work.

[1] https://lore.kernel.org/linux-bluetooth/20201119113943.13839-5-kiran.k%40intel.com/
Comment by Celeste (Coelacanthus) - Friday, 08 January 2021, 15:13 GMT
First of all thanks for your help about escape character

This problem seems to be caused by the lack of support for Intel's new generation of Bluetooth in the 5.10 kernel, causing systemd-udevd to perform an operation repeatedly and take up a lot of CPU
This series of patches (a total of five) has improved the kernel's support for it, so this problem can be fixed, so the actual fix for this problem is [PATCH v8 5/5] Bluetooth: btusb: Map Typhoon peak controller to BTUSB_INTEL_NEWGEN, but it depends on the other four patches,
So it seems we should treat them as a whole patch set (just like Ubuntu does)
Comment by Doug Newgard (Scimmia) - Friday, 08 January 2021, 16:11 GMT
If the stable kernel doesn't support your hardware, use a newer kernel. Not really a bug.

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