Re: acpi_sleep=s3_bios and Thinkpads

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

Hi!

> > Having tested around 6 different models of Thinkpad, we've found that
> > passing acpi_sleep=s3_bios always helps if there is no framebuffer
> > running, but tends to break things if there is a framebuffer. Is this
> > worth some sort of DMI hackery in order to make it more likely that
> > things will just work?
> 
> The BIOS will re-init to vga text mode for the general case. So you'd
> need instead to do some work on the pci resume path of the video drivers
> to do mode resets and the like. You may also need to play
> with vga routing but that ought to be set right by the BIOS.
> 
> Does switching console unbreak resume ?

Actually, on many machines video is *not* in 80x25 text mode upon
resume (Toshiba p4, arima, omnibook xe3). If it is in 80x25 text,
right thing is to enable vesafb and use s3_mode.
								Pavel

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