[Bug 199035] BCM2046B1 and hid2hci generates highcpu usage due to udev since 4.14 kernel

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https://bugzilla.kernel.org/show_bug.cgi?id=199035

Y S Gupta (ysg@xxxxxxxxxxxxxxxxxxxx) changed:

           What    |Removed                     |Added
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                 CC|                            |ysg@xxxxxxxxxxxxxxxxxxxx

--- Comment #8 from Y S Gupta (ysg@xxxxxxxxxxxxxxxxxxxx) ---
I also observed in my Dell laptop similar to Szymon that it relates to
Touchpad.

My workarounds-
Soon after booting, stopping and starting systed-udev eliminates all bind and
unbind problems and response drastically improves. I used the following
commands in sequence-

sudo systemctl stop systemd-udevd systemd-udevd-kernel.socket
systemd-udevd-control.socket

sudo systemctl start systemd-udevd systemd-udevd-kernel.socket
systemd-udevd-control.socket

My understanding-
Before all hardware is discovered properly, bind/unbind start executing when no
procedures are available and does not get reinitialized. After stopping and
starting, it gets all the procedures in place. Probably, it is booting sequence
problem.

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