Re: [linux-fbdev] [PATCH] fbcon->vgacon->fbcon

Re: [linux-fbdev] [PATCH] fbcon->vgacon->fbcon

[Petr Vandrovec]

On  3 Nov 00 at 17:20, James Simmons wrote:

> > > I know. I wanted for vgacon to reset the video mode itself. This way ANY
> > > fbdev driver can go back top vgacon. 
> > 
> > That won't be possible because returning to VGA text mode is chip-specific.
> 
> From what I see in the XF4.0 tree you can. I will find out today with me
> working on the tdfx driver. 

Yes, you can for example run BIOS initialization. In sandbox with x86
emulator ;-) It is much easier, and much safer, require for 2.5 that 
driver has to switch hardware to VGA mode on unload if hardware was 
in VGA mode before start, and if it is primary device in the box. 

For post-Millennium Matrox hardware, it is as simple as 
'outw(0x0003, 0x03DE);' (if you did not ask for disable VGA I/O & disable
VGA BIOS in matroxfb params. And if you asked... you probably know why 
better than driver).
                                        Best regards,
                                            Petr Vandrovec
                                            vandrove@vc.cvut.cz
                                                                                                    
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[PATCH] fbcon->vgacon->fbcon

[James Simmons]

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Hi!

 Here is a new version of my vga patch. I now have it where you go from
vgacon to fbcon to vgacon again. I have tried this with the vga16fb
driver and it works very well. It needs a little work for a better
vgacon restore mode. Vgacon can even restore the fonts itself :-) 
I tested it with the matrox framebufer with less luck. I assume I'm not
freeing resources properly. I will test it with other fbdev drivers next
week. Thank you.


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Re: [linux-fbdev] [PATCH] fbcon->vgacon->fbcon

[Petr Vandrovec]

On Fri, Oct 27, 2000 at 10:28:02PM -0700, James Simmons wrote:
> 
> Hi!
> 
>  Here is a new version of my vga patch. I now have it where you go from
> vgacon to fbcon to vgacon again. I have tried this with the vga16fb
> driver and it works very well. It needs a little work for a better
> vgacon restore mode. Vgacon can even restore the fonts itself :-) 
> I tested it with the matrox framebufer with less luck. I assume I'm not
> freeing resources properly. I will test it with other fbdev drivers next
> week. Thank you.

Matroxfb does not switch hardware to VGA mode on exit. Try doing
'fbset -depth 0 -a' before quitting from matroxfb.
						Petr Vandrovec
						vandrove@vc.cvut.cz


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Re: [linux-fbdev] [PATCH] fbcon->vgacon->fbcon

[James Simmons]

> Matroxfb does not switch hardware to VGA mode on exit. Try doing
> 'fbset -depth 0 -a' before quitting from matroxfb.

I know. I wanted for vgacon to reset the video mode itself. This way ANY
fbdev driver can go back top vgacon. 

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Re: [linux-fbdev] [PATCH] fbcon->vgacon->fbcon

[Geert Uytterhoeven]

On Thu, 2 Nov 2000, James Simmons wrote:
> > Matroxfb does not switch hardware to VGA mode on exit. Try doing
> > 'fbset -depth 0 -a' before quitting from matroxfb.
> 
> I know. I wanted for vgacon to reset the video mode itself. This way ANY
> fbdev driver can go back top vgacon. 

That won't be possible because returning to VGA text mode is chip-specific.

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds

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Re: [linux-fbdev] [PATCH] fbcon->vgacon->fbcon

[James Simmons]

> > I know. I wanted for vgacon to reset the video mode itself. This way ANY
> > fbdev driver can go back top vgacon. 
> 
> That won't be possible because returning to VGA text mode is chip-specific.

>From what I see in the XF4.0 tree you can. I will find out today with me
working on the tdfx driver. 

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