Semi-working patch for amd64 suspend/resume

[Nate Lawson]

Alexander Motin wrote:
> Jung-uk Kim wrote:
>> When you do 'sysctl debug.acpi.suspend_bounce=1' and 'acpiconf -s 3',
>> does it bounce back?  If it does not, there are other problems, e.g.,
>> device drivers.  On my desktop, for example, vga(4) tries to restore
>> previous state while resuming but it hangs system.  In fact, I believe
>> ISA-era EGA/VGA save/restore routines do not work for modern graphics
>> cards at all. :-(
> 
> Test passed from both console and XOrg. I have integrated i965GM video.
> 
> Here is verbose messages from that trip "there and back again":
> 
> Oct 23 00:11:55 mavbook acpi: suspend at 20081023 00:11:55

> Oct 23 00:12:00 mavbook kernel: vga0: saving 68 bytes of video state
> Oct 23 00:12:00 mavbook kernel: pci0:0:2:0: Transition from D0 to D3
> Oct 23 00:12:00 mavbook kernel: pci0:0:2:1: Transition from D0 to D3
> Oct 23 00:12:00 mavbook kernel: pci0:0:26:7: Transition from D0 to D3
> Oct 23 00:12:00 mavbook kernel: acpi: bad write to port 0x080 (32), val
> 0xbb
> Oct 23 00:12:06 mavbook kernel: pci0:0:27:0: Transition from D0 to D3
> Oct 23 00:12:06 mavbook kernel: pci0:0:31:2: Transition from D0 to D3

> Oct 23 00:12:06 mavbook kernel: pci0:0:2:0: Transition from D3 to D0
> Oct 23 00:12:06 mavbook kernel: pci0:0:2:1: Transition from D3 to D0
> Oct 23 00:12:06 mavbook kernel: acpi: bad write to port 0x080 (32), val
> 0xaa
> Oct 23 00:12:06 mavbook kernel: pci0:0:26:7: Transition from D3 to D0
> Oct 23 00:12:06 mavbook kernel: pci0:0:27:0: Transition from D3 to D0
> Oct 23 00:12:06 mavbook kernel: pci0:0:31:2: Transition from D3 to D0

That's kind of weird.  The above devices were turned off (D3) then back
on again (D0).  I'm wondering about that blocked write also.

-- 
Nate