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Date: Thu, 27 Mar 2003 15:11:54 -0800
From: Walt H <waltabbyh@comcast.net>
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To: Walt H <waltabbyh@comcast.net>
Cc: thunder7@xs4all.nl, linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: vesafb problem
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Walt H wrote:

> Well, I've answered my own question regarding highmem. Reserving 256MB 
> ram causes high-mem mapped IO to fail. I can have penguins, but no 
> filesystems or no penguins and a useable system. I'm guessing that I 
> could probably turn off HIGHMEM and HIGHMEM-IO and might be able to get 
> penguins back, but at the cost of reduced system performance. I'm not a 
> kernel hacker, but I might just see how bad I can break vesafb to remap 
> only the necessary memory for the requested video mode. Perhaps that 
> would fix the whole thing?
> 
> -Walt
> 

Well, here's what I've done. I've made a change in video/vesafb.c to 
change __init vesafb_init to only allocate the amount of memory required 
  for the requested framebuffer (I think). So far, it appears to work 
fine. I haven't tried many modes yet, but it's worked with what I've 
thrown at it. Thanks again,

The trivial change I made was changing this:

video_size	= screen_info.lfb_size * 65536;

to this:

video_size	= screen_info.lfb_width * screen_info.lfb_height * video_bpp;


-Walt

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