Re: Getting FB to work in Console

[David J Ring Jr <n1ea@arrl.net>]

OK so how do I get a frame buffer driver loaded?

I don't have any backlisted framebuffer drivers, what is stopping me from 
loading a frame buffer driver?

Does anyone know what I have to do?

David

On Sun, 13 Nov 2011, Anatolij Gustschin wrote:

> Hello David,
>
> On Sun, 13 Nov 2011 19:10:59 -0500 (EST)
> David J Ring Jr <n1ea@arrl.net> wrote:
>
>> Hello Anatolij,
>>
>> And when I reboot /dev/fb0 disappears again.
>
> Yes, this is expected since there is no frame buffer
> driver loaded in your system.
>
>> What is very strange to me is that when I run links2 -g the error message
>> says that /dev/fb0 does not exist, while if I list the file it says that
>> it is there ls /dev/fb0 says the file is there.
>
> I'll try to explain my understanding of the issue.
> The device node file /dev/fb0 is only an interface to the frame
> buffer driver. It can be created by the kernel automatically if
> there is a graphic chip in the system and the appropriate frame
> buffer driver is loaded and some device filesystem is initialized
> and mounted, e.g. devtmpfs device filesystem.
>
> Or /dev/fb0 can be created by the user, but if it has been created
> by the user and there is no frame buffer driver running, then the
> driver interface cannot be opened since no corresponding driver
> responds when an application tries to open the device. This is
> the error message that you currently see.
>
> When you create the device node file under /dev at runtime, it will
> disappear when rebooting, since the device file system under /dev
> will be unmounted. Even if there is a /dev directory on your hard
> disk with some existing device nodes, e.g. fb0 existing, there
> is still a possibility that you won't see these nodes at runtime.
> If the kernel creates device system at runtime and it is mounted
> under /dev, the content of this device system will be populated
> with device nodes for registered devices. When there is no frame
> buffer driver loaded, no fb0 device will be registered, no device
> node will be created.
>
> Hope this helps,
>
> Anatolij
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