On Friday, August 3, 2018 10:04:09 AM CEST Chris Chiu wrote: > Hi guys, > We have some new laptops with Intel new Intel WiskyLake CPU come > in and they all have the same problem. They all have the so-called > "Modern Standby" feature which is s2idle in Linux. > > The problem is the built-in keyboard no longer wake up the system > after it goes to s2idle. Only the power button can wake up. It's > different from the other laptops with old Intel CPUs (CoffeeLake, > KaybeLake...etc). We found the difference is that the EC (embedded > controller) no longer signals SCI event when in s2idle. > > Confirmed with ASUS EC engineer, he also admits that the EC code > for signaling SCI event in modern standby has been removed on > WiskyLake models. Because the built-in PS2 keyboard can still wake up > the system on WisksyLake+Windows10 RS4 combination without EC > intervention. > > Based on this information, we suspect that maybe the built-in > keyboard wakeup on Windows 10 RS4 in enabled by default (although we > don't know how to prove that). It's easy to simply do > 'device_set_wakeup_enable' and 'enable_irq_wake' for the i8042 > keyboard port to wake up the system without EC, but it's nasty. > > Any suggestion about how to achieve the keyboard wake up function > on these new laptops in a generic way? Thanks What about echoing "enabled" to the keyboard's power/wakeup file in sysfs? -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
