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Subjecti8042_init: PS/2 mouse not detected with ACPIPnP/PnPBIOS
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Dear Linux folks,


On the Asus F2A85-M PRO Linux 5.9-rc8 (and previous versions) does not
recognize a plugged in PS/2 mouse using the Plug & Play method. The PS/2
keyboard is detected fine, and using `i8042.nopnp`, the PS/2 mouse also
works.

> [ 1.035915] calling i8042_init+0x0/0x42d @ 1
> [ 1.035947] i8042: PNP: PS/2 Controller [PNP0303:PS2K] at 0x60,0x64 irq 1
> [ 1.035948] i8042: PNP: PS/2 appears to have AUX port disabled, if this is incorrect please boot with i8042.nopnp
> [ 1.036589] serio: i8042 KBD port at 0x60,0x64 irq 1
> [ 1.036621] initcall i8042_init+0x0/0x42d returned 0 after 687 usecs

But, the DSDT includes the “mouse device”. From

acpidump > dump.bin; acpixtract dump.bin; iasl -d *dat; more dsdt.dsl

we get

Device (PS2M)
{
Name (_HID, EisaId ("PNP0F03") /* Microsoft
PS/2-style Mouse */) // _HID: Hardware ID
Name (_CID, EisaId ("PNP0F13") /* PS/2 Mouse */)
// _CID: Compatible ID
Method (_STA, 0, NotSerialized) // _STA: Status
{
If ((IOST & 0x4000))
{
Return (0x0F)
}
Else
{
Return (Zero)
}
}

and the identifiers PNP0F03 and PNP0F13 are both listed in the array
`pnp_aux_devids[]`. But adding print statements to
`i8042_pnp_aux_probe()`, I do not see them, so the function does not
seem to be called.

Hints for further debugging are much appreciated.


Kind regards,

Paul


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