Re: S3 works on Dell i2650, but no display

[Pavel Machek <pavel-+ZI9xUNit7I@public.gmane.org>]

Hi!

> > > When I tried to resume however, I found that the console display
> > >didn't come back on - though I knew the machine was responsive because
> > >I could type commands
> 
> > You might need to get datasheet to your videocard and write specific
> > support. Also try lspci before and after suspend etc. [But don't
> > expect this to be easy].
> 
> Isn't this a general problem on all notebooks - even if you know everything 
> about the videocard used, might not the notebook use a completely different 
> mechanism for actually turning on and off the display (with
>backlight etc) ?

Okay, so you need videocard datasheet *and* notebook datasheet :-((((.

> I remember we had a similar discussion a while ago when I tried to get S3 
> working on my Acer notebook and the only way to enable that backlight was 
> through the bios lcall. Then 2.5.69 came, S3 broke again on the Acer, and I 
> haven't tested anything more :) 

Can you find out what patch exactly killed it?

> What is done in the other notebooks that actually have S3 working - do their 
> screens default to backlight-on when the hardware gets powered on, do they 
> use the lcall, or is there some other magic possible ? Can we systematically 
> solve that proble I mean ?

On HP omnibook, video is in state (pretty much exactly) it was after
S3. On toshiba, it is in text-mode vga with backlight on. On "hobit"
it needs lcall to initialize it through bios.
								Pavel
-- 
When do you have a heart between your knees?
[Johanka's followup: and *two* hearts?]


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