Messages in this thread | | | Date | Wed, 31 May 2006 19:59:32 +0800 | From | "Antonino A. Daplas" <> | Subject | Re: OpenGL-based framebuffer concepts |
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Ondrej Zajicek wrote: > On Wed, May 31, 2006 at 07:21:11AM +0800, Antonino A. Daplas wrote: >>> 2) To modify appropriate fbdev drivers to not do mode change at startup. >>> Fill fb_*_screeninfo with appropriate values for text mode instead. >> Most drivers do not change the mode at startup. Do not load fbcon, and >> you will retain your text mode even if a framebuffer is loaded. > > Yes, but i wrote about _using_ fbcon and fbdev without mode change.
boot with fbcon=map:9 /* or any number greater than the number of fbdev's loaded */
> >>> 3) (optional) To modify appropriate fbdev drivers to be able to switch >>> back from graphics mode to text mode. >> And a few drivers already do that, i810fb and rivafb. Load rivafb or i810fb, >> switch to graphics mode, unload, and you're back to text mode. > > I though about being able to explicitly change mode from graphics to text > (for example when fbdev-only X switch to fbcon) while using fbdev. This will require the following:
1. a generic text mode framebuffer driver, ie, an fbdev version of vgacon 2. a chipset driver that can fully restore VGA text mode.
The framebuffer layer already has helper functions that will save and restore the standard VGA registers. It's the save/restore of extended registers that only the chipset driver know about which is lacking. Once the above 2 are satisfied, the infrastructure is already present that will do what you want.
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