Re: suspend/restore almost works on Sony PCG-GRX570, acpi_video not good

John Baldwin writes:
 > On Monday 27 June 2005 06:57 pm, George Hartzell wrote:
 > > John Baldwin writes:
 > >  > On Sunday 19 June 2005 06:31 pm, George Hartzell wrote:
 > >  > > Hi,
 > >  > >
 > >  > > I'm working on a Sony PCG-GRX570.
 > >  > > [...]
 > >  >
 > >  > The problem is that your LCD isn't turned back on via DPMS, but there's
 > >  > not a good way to fix that always.  Especially if your BIOS doesn't
 > >  > support DPMS.
 > >
 > > Can you say a bit more about this?   [...] 
 > 
 > The ACPI spec says that the OS is supposed to power down the attached
 > monitor using DPMS before it shuts down the video controller and that
 > it should turn the monitor back on using DPMS after it has resumed the
 > video controller.  FreeBSD currently just does the video controller
 > parts (sort of) and doesn't do the DPMS stuff at all except in the
 > patch to hack acpi_video, and that only works if your VGA BIOS
 > supports DPMS and it can only work for the primary monitor even then.

So, do you think that I'm hanging when I try to resume because the
display wasn't shut off using DPMS before FreeBSD shutdown (or
sort-of-shutdown) the video controller), or do you think that the lack
of DPMS shutdown confounds the situation?

g.