On Mon, Apr 08, 2019 at 09:55:00AM +0000, David Laight wrote: > From: Lyude Paul > > Sent: 07 April 2019 23:55 > > On Sun, 2019-04-07 at 15:10 -0700, Dmitry Torokhov wrote: > > > Hi Lyude, > > > > > > On Sun, Apr 07, 2019 at 05:37:34PM -0400, Lyude Paul wrote: > > > > The late 2016 model of the Razer Blade Stealth has a built-in USB > > > > keyboard, but for some reason the BIOS exposes an i8042 controller with > > > > a connected KBD port. While this fake AT Keyboard device doesn't appear > > > > to report any events, attempting to change the state of the caps lock > > > > LED on it from on to off causes the entire system to hang. > > > > > > > > So, introduce a quirk table for disabling keyboard probing by default, > > > > i8042_dmi_nokbd_table, and add this specific model of Razer laptop to > > > > that table. > > > > > > What does dmesg show about i8042 for this device? Especially line "PNP: > > > PS/2 Controller ..."? > > > > > > > Apr 07 18:42:46 malachite kernel: i8042: PNP: No PS/2 controller found. > > Apr 07 18:42:46 malachite kernel: i8042: Probing ports directly. > > Apr 07 18:42:46 malachite kernel: serio: i8042 KBD port at 0x60,0x64 irq 1 > > Apr 07 18:42:46 malachite kernel: serio: i8042 AUX port at 0x60,0x64 irq 12 > > Apr 07 18:42:46 malachite kernel: mousedev: PS/2 mouse device common for all mice > > That is the 'default' probe of the ps/2 serial ports. > Looks like the BIOS is correct in not exposing the ps/2 controller. > Usually they just fail to expose the mouse when it needs a ps/2 splitter :-( > > I do wonder what they've connected it to though. > It is extremely unlikely they've found an x86 chipset that doesn't > have the ps/2 serial ports at the standard io addresses. I wonder if it is time to start trusting BIOS if it was released maybe in Win7+ timeframe? Thanks. -- Dmitry
