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From: Andi Kleen <ak@suse.de>
To: "Antonino A. Daplas" <adaplas@gmail.com>
Subject: Re: Console debugging wishlist was: Re: oops pauser.
Date: Wed, 11 Jan 2006 14:17:18 +0100
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On Wednesday 11 January 2006 14:05, Antonino A. Daplas wrote:
> Andi Kleen wrote:
> > On Wednesday 11 January 2006 13:24, Antonino A. Daplas wrote:
> > 
> >> In the VGA console, all buffers, including scrollback is in video RAM, but
> >> the size is fixed and is very small.
> > 
> > I wonder if that can be fixed.
> 
> It can be done, but it will affect VGA console performance.

By how much? As long as it still scrolls reasonably fast it would be ok for me.

>  
> > 
> >> With the framebuffer console, you can increase the size of the scrollback
> >> buffer with the boot option:
> >>
> >> fbcon=scrollback:<n> (default is 32K)
> > 
> > On x86-64 vesafb is unusable slow because it does CPU scrolling cause
> > it can't use the vesa BIOS - and the others don't work everywhere. So I don't
> > think fbcon is an usable replacement.
> 
> How about vga16fb + fbcon? If scrolling is slow in vga16fb, fbset -vyres 800 should
> increase performance significantly.

I can try it.

-Andi
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