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From: Justin P. Mattock on 31 May 2010 13:50
On 05/31/2010 10:07 AM, Matthew Garrett wrote:
> I know that I'm partially responsible for this, but again this strongly
> indicates that we're doing something wrong. I'll look into how Windows
> behaves.
>


alright!! I've a machine over here
test anything..

Justin P. Mattock
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From: Justin P. Mattock on 1 Jun 2010 15:20
On 06/01/2010 12:00 PM, Matthew Garrett wrote:
> Can you try with this patch? From what I can see of Apple ACPI tables,
> it should be functionally equivalent but less hate inducing.
>
> commit 9c8c25fda1b993a81b1a3a9bc4e9e8b0d7ac4062
> Author: Matthew Garrett<mjg(a)redhat.com>
> Date: Tue Jun 1 14:40:55 2010 -0400
>
> x86: Default to using ACPI for reboot
>
> Running a hacked qemu with a modified seabios image that declares support
> for reboot via ACPI shows that Windows will use the ACPI reboot vector
> before falling back to hitting i8042. Change the default reboot method to
> match this. This looks like it should improve life for Apples, which
> declare the cf9 reboot method via ACPI, don't have a competent i8042
> emulation and currently have a large DMI whitelist.
>
> Signed-off-by: Matthew Garrett<mjg(a)redhat.com>
>
> diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
> index 8e1aac8..0a04c4b 100644
> --- a/arch/x86/kernel/reboot.c
> +++ b/arch/x86/kernel/reboot.c
> @@ -34,7 +34,7 @@ EXPORT_SYMBOL(pm_power_off);
>
> static const struct desc_ptr no_idt = {};
> static int reboot_mode;
> -enum reboot_type reboot_type = BOOT_KBD;
> +enum reboot_type reboot_type = BOOT_ACPI;
> int reboot_force;
>
> #if defined(CONFIG_X86_32)&& defined(CONFIG_SMP)
>


o.k. applied.. unfortunately
I get init telling me it's rebooting,
then, nothing but a black screen.

Justin P. Mattock
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From: Justin P. Mattock on 1 Jun 2010 16:10
On 06/01/2010 12:21 PM, Matthew Garrett wrote:
> On Tue, Jun 01, 2010 at 12:14:07PM -0700, Justin P. Mattock wrote:
>
>> o.k. applied.. unfortunately
>> I get init telling me it's rebooting,
>> then, nothing but a black screen.
>
> Could you send me the output of acpidump on this machine? Also, try
> building the following app and running it as root:
>
> #include<sys/io.h>
>
> int main() {
> outb(6, 0xcf9);
> return 0;
> }
>
> and see if the machine reboots.
>

nope.. here is what I get:
../reboot
Segmentation fault (core dumped)

and in dmesg:
[ 1401.323601] reboot[3615] general protection ip:40048b
sp:7fff2a601910 error:0 in reboot[400000+1000]


Justin P. Mattock
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From: Justin P. Mattock on 1 Jun 2010 16:20
On 06/01/2010 01:07 PM, Matthew Garrett wrote:
> On Tue, Jun 01, 2010 at 01:06:17PM -0700, Justin P. Mattock wrote:
>
>> nope.. here is what I get:
>> ./reboot
>> Segmentation fault (core dumped)
>
> Sorry, put
>
> iopl(3);
>
> before the outb.
>


still craps out.
this is what the code looks like now:

#include <sys/io.h>

int main() {
iopl(3);
outb(6, 0xcf9);
return 0;
}
(hopefully done right).

as for the acpidump, I seem
to be hitting some error trying
to dissemble it, so I just grabbed my copy from:
https://bugzilla.kernel.org/show_bug.cgi?id=14483

what/where might I be looking for, for this reboot
port in the *.dsl?

Justin P. Mattock
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From: Justin P. Mattock on 1 Jun 2010 16:40
On 06/01/2010 01:21 PM, Matthew Garrett wrote:
> On Tue, Jun 01, 2010 at 01:17:42PM -0700, Justin P. Mattock wrote:
>
>> still craps out.
>> this is what the code looks like now:
>
> You're running it as root, right? It behaves exactly as I'd expect here.
>

the first run of this was normally.
then root..
(and your right this time after the
change I forgot to do a su)
now running as root gives nothing.

Justin P. Mattock
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