Re: [Linux-fbdev-users] Error: /dev/fb0: No such device

[Gustavo V. <g_v...@ho...>]

James,

As you asked me. I took a lot at the dmesg file and I found:

Console: colour VGA+ 80x25

And when I did the cat /proc/fb, there was nothing to see.

I'm using an old vga ISA card. So I assume that the VESAVGA driver didn't 
support it.
Then I tried with the VGA16-color graphics console driver. The options that 
I selected for re-compiling the kernel were:

- VGA text console
- Video mode selection support
- Support for frame buffer devices
- VGA 16-color graphics console
- Advanced low level driver options
- 2 bpp packed pixels support
- 4 bpp packed pixels support
- 8 bpp packed pixels support
- 16 bpp packed pixels support
- 24 bpp packed pixels support
- 32 bpp packed pixels support

Then when I reboot with that kernel and whites vertical lines appear on the 
screen and yellow points on the top of the screen. It must be the penguin. 
But then the screen doesn't change. Then I log in in dark. I do startx and I 
can take a look at the dmesg file:

vga16fb: inilializing
vga16fb: mapped to 0xc00a0000
fbcon_setup: NO support for fontwidth 8
fbcon_setup: type 4 (aux 0,depth 4) not supported
Console: switching to colour frame buffer device 80x30
fb0: VGA16 VGA frame buffer device

And I do the cat /proc/fb with the following result:

0 VGA16 VGA

The fbset works too:

mode "640x480-59"
   # D: 25.176 MHz, H: 31.469 kHz, V: 59,489 Hz
   geometry 640 480 640 480 4
   timings 39721 48 16 39 8 96 2
   rgba 6/0,6/0,6/0,0/0
endmode
I could not change the mode.

But it's not working properly.
Any suggestion ?

Gustavo


>From: James Simmons <jsi...@tr...>
>To: Gustavo Vilches <g_v...@ho...>
>CC: lin...@li...
>Subject: Re: [Linux-fbdev-users] Error: /dev/fb0: No such device
>Date: Thu, 4 Apr 2002 11:09:57 -0800 (PST)
>
>
>
> > Hello ,
> >
> > I  compiled the kernel with the VESA frame buffer
> > driver and made changes in lilo.conf by adding
> > VGA=ask in addition to other standard enteries.
> >
> > The system booted ok , it asked for which mode I gave
> > 80*43 and everything was working fine. After logging
> > in as root , I gave the command
> >
> > cp /dev/fb0 screen
> >
> > It gave a error
> >
> > /dev/fb0 : No such device
> >
> > The documentation said that you can use /dev/fb0 in
> > the same way as /dev/mem .
> >
> > Am I missing something ?
>
>What does dmesg say. Also can you do a cat /proc/fb.
>
>
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>Linux-fbdev-users mailing list
>Lin...@li...
>https://lists.sourceforge.net/lists/listinfo/linux-fbdev-users


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