Re: Unsupported USB BT device causes high interrupt load

[Dominic Fandrey]

> I have an Interrupt load of 2000 interrupts/s from xhci0.
> 
> As the culprit I have identified the following device:
> 
> ugen0.6: <vendor 0x8087 product 0x07dc> at usbus0, cfg=255 md=HOST spd=FULL 
> (12Mbps) pwr=ON (100mA)
> 
> …

The device spamms me with interrupts after every boot and resume
until I send it a power_off command.

For anyone else with a similar problem, I'm using the following devd
rule to mitigate the issue (https://pastebin.com/raw/HmDur3Le):

notify 100 {
        match "system"          "USB";
        match "subsystem"       "INTERFACE";
        match "type"            "ATTACH";
        match "vendor"          "0x8087";
        match "product"         "0x07dc";
        action "usbconfig -d $cdev power_off";
};

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