Re: Delaying i8042 probe?

Hi Takashi,

On Thu, Sep 16, 2021 at 6:16 AM Takashi Iwai [off-list ref] wrote:

The patch was confirmed to work.

That's good news.

  https://bugzilla.suse.com/show_bug.cgi?id=1190256#c19

| That one worked despite the CTR error:
|
| [    0.000000] Linux version 5.14.2-3.g9458b22-default (geeko@buildhost) (gcc (SUSE Linux) 11.2.1 20210816 [revision 056e324ce46a7924b5cf10f61010cf9dd2ca10e9], GNU ld (GNU Binutils; openSUSE Tumbleweed) 2.36.1.20210326-4) #1 SMP Sun Sep 12 20:15:58 UTC 2021 (9458b22)
| [    0.484315] i8042: PNP: PS/2 Controller [PNP0303:PS2K] at 0x60,0x64 irq 1
| [    0.484318] i8042: PNP: PS/2 appears to have AUX port disabled, if this is incorrect please boot with i8042.nopnp
| [    1.005361] i8042: Can't read CTR while initializing i8042
| [    1.477053] serio: i8042 KBD port at 0x60,0x64 irq 1
| [    1.503700] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input2
|
| Seems it takes more than a secod to initialize, ugh

I'm not sure what's done during this 0.5 second period after CTR read
failure.  At least only shuffling the driver init order for built-in
drivers didn't suffice.

This extra 0.5 seconds is the time it takes to re-probe the driver at
a later stage after deferral.

I am not familiar with this driver and its BIOS dependencies, so let's
see what Dmitry suggests as a proper fix.

Thanks