vga text console

vga text console

[James C Georgas]

I can't seem to remove the VGA text console from my kernel
configuration. Can someone please enlighten me?

Re: vga text console

[Antonino A. Daplas]

On Mon, 2006-08-14 at 21:11 -0400, James C Georgas wrote:
> I can't seem to remove the VGA text console from my kernel
> configuration. Can someone please enlighten me?

You can't. It is always part of the kernel (for X86 at least). What's
your intention?

Tony

Re: vga text console

[Antonino A. Daplas]

On Tue, 2006-08-15 at 09:22 +0800, Antonino A. Daplas wrote:
> On Mon, 2006-08-14 at 21:11 -0400, James C Georgas wrote:
> > I can't seem to remove the VGA text console from my kernel
> > configuration. Can someone please enlighten me?
> 
> You can't. It is always part of the kernel (for X86 at least). What's
> your intention?

And correcting myself, you can configure out vgacon, but you have to
define CONFIG_EMBEDDED, and undefine CONFIG_VT.

Tony

Re: vga text console

[James C Georgas]

On Tue, 2006-15-08 at 09:26 +0800, Antonino A. Daplas wrote:
> On Tue, 2006-08-15 at 09:22 +0800, Antonino A. Daplas wrote:
> > On Mon, 2006-08-14 at 21:11 -0400, James C Georgas wrote:
> > > I can't seem to remove the VGA text console from my kernel
> > > configuration. Can someone please enlighten me?
> > 
> > You can't. It is always part of the kernel (for X86 at least). What's
> > your intention?

I want to write my own VGA text console driver.

> And correcting myself, you can configure out vgacon, but you have to
> define CONFIG_EMBEDDED, and undefine CONFIG_VT.
> 
If I define CONFIG_EMBEDDED, is that going to change the behaviour of
other subsystems, or does it just enable more options?

Re: vga text console

[Antonino A. Daplas]

On Mon, 2006-08-14 at 21:41 -0400, James C Georgas wrote:
> On Tue, 2006-15-08 at 09:26 +0800, Antonino A. Daplas wrote:
> > On Tue, 2006-08-15 at 09:22 +0800, Antonino A. Daplas wrote:
> > > On Mon, 2006-08-14 at 21:11 -0400, James C Georgas wrote:
> > > > I can't seem to remove the VGA text console from my kernel
> > > > configuration. Can someone please enlighten me?
> > > 
> > > You can't. It is always part of the kernel (for X86 at least). What's
> > > your intention?
> 
> I want to write my own VGA text console driver.
> 
> > And correcting myself, you can configure out vgacon, but you have to
> > define CONFIG_EMBEDDED, and undefine CONFIG_VT.
> > 
> If I define CONFIG_EMBEDDED, is that going to change the behaviour of
> other subsystems, or does it just enable more options?
> 

It basically opens up a lot of config options. It may also disable a few
incompatible options (ie, CONFIG_DEBUG_VERBOSE), and enable a few.  It
will require that you know exactly what options need to be turned on or
off.

Tony

Re: vga text console

[James C Georgas]

On Tue, 2006-15-08 at 09:54 +0800, Antonino A. Daplas wrote:
> > If I define CONFIG_EMBEDDED, is that going to change the behaviour of
> > other subsystems, or does it just enable more options?
> > 
> 
> It basically opens up a lot of config options. It may also disable a few
> incompatible options (ie, CONFIG_DEBUG_VERBOSE), and enable a few.  It
> will require that you know exactly what options need to be turned on or
> off.
Oh. That actually sounds like it could be a lot of fun. I'm a big fan of
the Minimal Kernel.

I'm kind of surprised that the VGA console can't be built as a module,
like the other console drivers in the kernel can be. Is this on purpose,
or is it just that nobody has gotten around to it?

Re: vga text console

[Antonino A. Daplas]

On Mon, 2006-08-14 at 22:09 -0400, James C Georgas wrote:
> On Tue, 2006-15-08 at 09:54 +0800, Antonino A. Daplas wrote:
> > > If I define CONFIG_EMBEDDED, is that going to change the behaviour of
> > > other subsystems, or does it just enable more options?
> > > 
> > 
> > It basically opens up a lot of config options. It may also disable a few
> > incompatible options (ie, CONFIG_DEBUG_VERBOSE), and enable a few.  It
> > will require that you know exactly what options need to be turned on or
> > off.
> Oh. That actually sounds like it could be a lot of fun. I'm a big fan of
> the Minimal Kernel.
> 
> I'm kind of surprised that the VGA console can't be built as a module,
> like the other console drivers in the kernel can be. Is this on purpose,
> or is it just that nobody has gotten around to it?
> 

It's possible to make vgacon modular, the changes required will be
minimal. It would seem that nobody ever had a need for it, so that was
never done.

Tony

Re: vga text console

[Jan Engelhardt]

>> I'm kind of surprised that the VGA console can't be built as a module,
>> like the other console drivers in the kernel can be. Is this on purpose,
>> or is it just that nobody has gotten around to it?
>
>It's possible to make vgacon modular, the changes required will be
>minimal. It would seem that nobody ever had a need for it, so that was
>never done.

Maybe someday this will happen automagically when VGA/FB switching 
is finished.


Jan Engelhardt
--