Video PM Methods

Pat Suwalski pat at suwalski.net
Wed May 17 06:49:47 PDT 2006


This is getting a little off-topic, but it's still good to note somewhere.

Stefan Seyfried wrote:
>> Does anyone know if it's just a rePOSTing issue or something? Could it 
>> really not be rectified in the kernel?
> 
> At least the DELLs just reboot instead of resuming, AFAICS before ever
> handing control back to the kernel. The OS they were designed for is not
> using a framebuffer console :-)

I actually have a Dell D600 with Radeon 9000M9 in it that exhibits the 
failure-to-resume, but it does not reboot. It just sits there. But 
that's just for the record. :)

>> The other evolving problem is that many newer (especially nVidia) cards 
>> don't support vesafb at all, and the more-hardware-specific framebuffers 
>> aren't as kind to power management.
> 
> But those could be, they need to know about the hardware and could implement
> power management stuff. This is a "fix the driver" issue.

It's true, but there is a slew of issues with that, as well. There are 
quite a few i810s that don't like VESA (those that need help getting 
their memory set), and i810fb required agpgart to do its magic. So 
that's not quite ideal either. Again, just a note, as I've been working 
with all this a heck of a lot lately.

--Pat


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