[Linux-fbdev-devel] [RFC] intelfb + DirectFB + laptop issue

[Paulius Z. <pau...@gm...>]

Hi,

After failing to start DirectFB (tries to get and then set current
resolution) on my asus eeePC I investigated problem and I found out
that it is caused by:

static int intelfb_check_var(struct fb_var_screeninfo *var,
                              struct fb_info *info)
{
...
	if (FIXED_MODE(dinfo) &&
	    (change_var ||
	     var->yres_virtual > dinfo->initial_var.yres_virtual ||
	     var->yres_virtual < dinfo->initial_var.yres ||
	     var->xoffset || var->nonstd)) {
		if (first) {
			ERR_MSG("Changing the video mode is not supported.\n");
			first = 0;
		}
		return -EINVAL;
	}
...

I my situation FIXED_MODE(dinfo) = true, but change_var = false
It still fails since dinfo->initial_var.yres_virtual is initialized
only once as 0, so var->yres_virtual is always bigger value.

Do we need these checks? chnage_var already does size chekings...

fbset -accel [true|false] also fails because of this check.

Please help me to resolve this issue and we should send patch for stable
also.

BR,
Paulius Zaleckas