Xfbdev on intelfb framebuffer.

[Peter Hanzel]

Hello again,

I have found a solutions. There was another call to ioctl 
FBIOPUT_VSCREENINFO in the same file
on line 670:

Bool
fbdevEnable (ScreenPtr pScreen)
{
    ....
        /* display it on the LCD */
    k = ioctl (priv->fd, FBIOPUT_VSCREENINFO, &priv->var);
    if (k < 0)
    {
     perror ("FBIOPUT_VSCREENINFO");
     return FALSE;
    }

So I commented out this line also and voila XFbDev is working on intelfb 
with no problems.
It also works for VesaFb.


Maybe some patch to xorg?


----- Original Message ----- 
From: "Peter Hanzel" <hanzelpeter at gmail.com>
To: <xorg at freedesktop.org>
Sent: Wednesday, January 14, 2009 2:27 PM
Subject: Xfbdev on intelfb framebuffer.


> Hello.
>
> I have compiled Xfbdev. It works great with VesaFramebuffer in kernel 
> compiled.
> But I have Intel 965GM graphic so I changed kernel to work with "intelfb" 
> framebuffer. Console in framebuffer works good.
> But when I start X I received:
>
> error: invalid argumenr
> No screens found
> Existing.
>
> I have digged into sources and found this line:
>
> xorg-server-1.2.0\xorg-server-1.2.0\hw\kdrive\fbdev\fbdev.c
> line 201
>
>    k = ioctl (priv->fd, FBIOPUT_VSCREENINFO, &var);
>
>    if (k < 0)
>    {
> fprintf (stderr, "error: %s\n", strerror (errno));
> return FALSE;
>    }
>
> So this is causing problems. IntelFb framebuffer on my laptop doesn't 
> support changing video modes, so this is probably reason, why it returns 
> error.
> But as next I have commented out this lines, and recompiled Xfbdev.
> But it doesn't start. It passes init, but screen stays black and text 
> cursor is shown (but not blinking). Ctrl+Alt+Backspace is not working.
> I have only to reboot. (Ctrl+Alt+Del works).
> But when I reboot to kernel with VesaFramebuffer, the newly compiled 
> Xfbdev works like a charm. So only kernel differencies make this X to 
> hang.
>
> Next i will try it with logging to file and strace.
>
> Any suggestions?
>
> Thanks.
>
>
>