On 12/11/2012 12:29 PM, Ondrej Zary wrote: > > Something like this? (It works.) > Something like that. We need to make sure we send the proper sequence, though, or it might break some SMM firmware... > diff --git a/drivers/input/serio/i8042-x86ia64io.h b/drivers/input/serio/i8042-x86ia64io.h > index d6cc77a..0807ac7 100644 > --- a/drivers/input/serio/i8042-x86ia64io.h > +++ b/drivers/input/serio/i8042-x86ia64io.h > @@ -921,6 +921,7 @@ static int __init i8042_platform_init(void) > int retval; > > #ifdef CONFIG_X86 > + u8 a20_on = 0xdf; > /* Just return if pre-detection shows no i8042 controller exist */ > if (!x86_platform.i8042_detect()) > return -ENODEV; > @@ -960,6 +961,13 @@ static int __init i8042_platform_init(void) > > if (dmi_check_system(i8042_dmi_dritek_table)) > i8042_dritek = true; > + > + /* > + * A20 was already enabled during early kernel init. But some buggy > + * BIOSes (in MSI Laptops) require A20 to be enabled using 8042 to > + * resume from S3. So we do it here and hope that nothing breaks. > + */ > + i8042_command(&a20_on, 0x10d1); > #endif /* CONFIG_X86 */ > > return retval; > -- 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
