Hi Paul,
On Wed, Oct 07, 2020 at 11:18:41PM +0200, Paul Menzel wrote:
> 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.
My guess is that _STA returns 0 indicating that the device is not
present. I would try tracking where IOST is being set and figuring out
why it does not have mouse bit enabled.
Thanks.
--
Dmitry
