Re: no console switching

Thanks for you quick reply.

Geert Uytterhoeven wrote:

On Tue, 11 Nov 2003, Manousaridis Angelos wrote:

quoted

I am trying to implement a framebuffer device without console support. I want to display only graphics, no text at all.

Is there a way to avoid the console take over?

Disable CONFIG_VT_CONSOLE.

I did that. there is no change.

quoted

I don't have the actuall graphics device yet, so I have created an initial version of the driver looking a lot like the vfb device.
I set the dispsw variable of the display structure to fbcon_dummy.
When I load the module I see this:

fbcon_setup: No support for fontwidth 8
fbcon_setup: type 0 (aux 0, depth 8) not supported

That's harmless, and caused by fbcon_dummy.

quoted

Console: switching to colour frame buffer device 80x30
fb0: Teralogic 751 frame buffer device

The module count increases to 63 and I cannot unload the module.

Because the virtual console subsystem uses 63 virtual consoles by default, and
increases the module counter for each of them.

In the register_fremabuffer routine, this is called for the first framebuffer that is registered:

 take_over_console(&fb_con, first_fb_vc, last_fb_vc, fbcon_is_default)

This is what I don't like. When that happens, I cannot free fb0.
There is a give_up_console function but it is never called.

quoted

If I comment this line causing the owner variable to be undefined, the module count does not increase and the module can be unloaded.
But It seems that the device is NOT unregistered. When I load the module

Your module_cleanup() routine must unregister your fb_info.

It does call unregister_framebuffer, but it returns "device busy" because fb0 is used as the system console.

I want either to avoid this :
"Console: switching to colour frame buffer device 80x30"
(which means take_over_console will not be called)
or, if I can't do that, to be able to take back by first framebuffer (fb0) from the console, so that I can unregister it.

What am I missing here?

--
Manousaridis Angelos



-------------------------------------------------------
This SF.Net email sponsored by: ApacheCon 2003,
16-19 November in Las Vegas. Learn firsthand the latest
developments in Apache, PHP, Perl, XML, Java, MySQL,
WebDAV, and more! http://www.apachecon.com/