vga16fb display size problems (Re: Live CD X autoconfiguration)

[Matt Zimmerman]

On Tue, Jan 18, 2005 at 07:11:43PM +0100, Marcus Bauer wrote:

> X auto configuration works fine here. Tested on two systems with
> a) an older ATI Rage Pro Mach64 and 
> b) a newer SIS 740
> 
> However on the SIS 740 the debian installer's lower six lines are off
> screen. Thus some of the <ok> buttons are not visible.
> 
> The relevant part of dmesg might be this:
> 
> vesafb: probe of vesafb0 failed with error -6
> vga16fb: initializing
> vga16fb: mapped to 0xc00a0000
> fb0: VGA16 VGA frame buffer device
> Console: switching to colour frame buffer device 80x30
>                                                  ^^^^^
> 
> It get's initialized a 80x30 but only 80x24 is shown on screen.
> 
> Simple workaround for me is to boot with i.e. vga=791 

According to Colin, there is currently no reliable way around this.  On some
systems, it seems to just get it wrong, and a boot parameter is needed to
work around the problem.

-- 
 - mdz