> One other note: 
> 
> At boot time the VGA is reported as:
> Aug 25 21:15:20 laptop kernel: vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 
>0xa0000-0xbffff on isa0
> 
> And when I load your module:
> Aug 25 21:12:44 laptop kernel: vga_pci0: <Generic PCI VGA> port 0xc000-0xc0ff mem 
>0xfcff0000-0xfcffffff,0xe0000000-0xe7ffffff irq 11 at device 0.0 on pci1
> 
> In other words, is it a problem that it is already configured as an ISA
> device or is that normal?

It's normal.  My vga_pci driver only provide suspend/resume methods so
that kernel manipulate PCI power state for VGA device.  Usually do
nothing.

> > If this don't solve your problem, I think graphic chip need to be
> > re-initialized on wakeup.  Maybe needs time...
> 
> Ah, that makes sense. I was searching through the acpi documentation and
> couldn't find anything about displays actually. So this is fully
> controlled by the graphics controller?
> 
> > Some VAIO machines (w/ ATI graphic chip), also have the same problem.
> 
> I also have an ATI chip. ATI Radeon to be precise, is that a possible 
> explanation?

Yes, I think so too.
Any volunteers to solve this problem?

Thanks

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