Messages in this thread | | | Date | Wed, 2 Jun 2010 20:06:33 -0600 | Subject | Re: [PATCH]X86:reboot.c Add some dmi entries to pci_reboot_dmi_table. | From | Robert Hancock <> |
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On Wed, Jun 2, 2010 at 7:56 PM, Matthew Garrett <mjg59@srcf.ucam.org> wrote: > On Wed, Jun 02, 2010 at 07:47:17PM -0600, Robert Hancock wrote: >> On Wed, Jun 2, 2010 at 7:37 PM, Matthew Garrett <mjg59@srcf.ucam.org> wrote: >> > That's pretty infuriating. The ACPI-provided definition doesn't work, >> > and there's no ACPI mechanism for expressing the more complex cf9 >> > behaviour. Windows doesn't appear to special case this, so we're >> > probably left trying to figure out why the keyboard controller method >> > doesn't work. Sigh. >> >> Do these Macs even have a PC keyboard controller? A recent thread on >> PS/2 keyboard/mouse controller probing suggests they may not.. > > Possibly an SMM trap... > >> Justin, what happens if you try the simple outb(6, 0xcf9) test program >> multiple times, does that do anything? > > Huh. That might work, yes. Windows does the ACPI write, an i8042 write, > the ACPI write, another i8042 write and then gives up. If that happens > sufficiently quickly, this might get us somewhere. Justin, can you try:
If that's the sequence Windows is using then I'm thinking that's likely what we should be doing as well..
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