On Wednesday, January 13, 2016 06:06:18 PM René Rebe wrote: > Hi all, > > for some years our old Mac Pro and newer Mac mini used for unit testing and VMs > annoyed me in that we could never get Wake-On-Lan working on them at all. > > Some people found some pci config bit poking for some older Mac mini that did not > work on our newer Mac mini, nor on our older Mac Pro. > > http://blog.dhampir.no/content/wake-on-lan-on-a-n-intel-mac-mini-with-linux > > While we where setting up some new things we finally wanted this solved, and I found > a clever workaround by halting the machine to S4 instead of S5. > > While of course this patch can not be applied as it. I just wanted to ask for feedback - > maybe a kernel or sysfs interface can be added to have a halt=S4 or whatever > switch as this might be useful to convince other machines to supply power to the NIC, > too. This potentially has side effects beyond the wakeup devices handling, so I won't recommend doing that in general. Also, this seems to be a policy decision made by the platform designers. Apparently, they don't want you to wake up from "off" via WoL. > > --- linux-4.3/drivers/acpi/sleep.c.orig 2015-12-29 15:27:21.100959963 +0000 > +++ linux-4.3/drivers/acpi/sleep.c 2015-12-29 15:28:36.828960630 +0000 > @@ -811,7 +811,7 @@ > static void acpi_power_off_prepare(void) > { > /* Prepare to power off the system */ > - acpi_sleep_prepare(ACPI_STATE_S5); > + acpi_sleep_prepare(ACPI_STATE_S4); > acpi_disable_all_gpes(); > acpi_os_wait_events_complete(); > } > @@ -821,7 +821,7 @@ > /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ > printk(KERN_DEBUG "%s called\n", __func__); > local_irq_disable(); > - acpi_enter_sleep_state(ACPI_STATE_S5); > + acpi_enter_sleep_state(ACPI_STATE_S4); > } > > int __init acpi_sleep_init(void) Thanks, Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
