.Sh LOADER TUNABLE

The following tunable can be set at the

.Xr loader 8

prompt before booting the kernel, or stored in

.Xr loader.conf 5 .

.Bl -tag -width indent

.It Va usb.quirk.%d

The value is a string whose format is:

.Bd -literal -offset indent

.Qo VendorId ProductId LowRevision HighRevision UQ_QUIRK,... Qc

.Ed

.Pp

Installs the quirks

.Ic UQ_QUIRK1,...

for all USB devices that will match

.Ic VendorId ,

.Ic ProductId

with a hardware revision included between

.Ic LowRevision

and

.Ic HighRevision .

.Pp

.Ic VendorId ,

.Ic ProductId ,

.Ic LowRevision

and

.Ic HighRevision

are all 16 bits numbers that can be decimal or hexadecimal based.

.Pp

100 variables

.Ic usb.quirk.0, .1, ..., .99

can be defined.

.Pp

If a matching entry is found in the kernel internal quirks table, it

is replaced by the new defined one.

.Pp

If not, a new entry is created (while the table is not full).

.Pp

Kernel iterates over

.Ic usb.quirk.N

variables

.Ic (N = 0; N < 100)

and stop after the first non-existent one.

.El

.Pp

To install a quirk at boot time, place one or several lines like the

following in

.Xr loader.conf 5 :

.Bd -literal -offset indent

usb.quirk.0="0x04d9 0xfa50 0 0xffff UQ_KBD_IGNORE"

.Ed