RE: Generic VESA framebuffer driver and Video card BOOT?

It is hard to use native VGA for s3 debugging. 
I don know if serial console or net console 
can help s3 debugging. 

Thanks
Luming 

-----Original Message-----
From: linux-kernel-owner@vger.kernel.org 
[mailto:linux-kernel-owner@vger.kernel.org] On Behalf Of Pavel Machek
Sent: 2004Äê10ÔÂ20ÈÕ 5:09
To: Jon Smirl
Cc: Kendall Bennett; Alan Cox; Linux Kernel Mailing List; fbdev
Subject: Re: Generic VESA framebuffer driver and Video card BOOT?

Hi!

quoted

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What about non-x86 platforms such as PowerPC and MIPS 

embedded devices

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that want video (TiVo type platforms, media players etc). 

How would these

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fit into the picture? Would this require the boot loader 

(ie: U-Boot or

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whatever) to have the ability to POST the card?

There is the assumption that whatever BIOS the device has 

can get up a

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very early console that can output critical error messages before the
kernel and early user space is loaded. For example the "I can't find
the kernel" or  "initramfs is missing" error message. This also
assumes that the BIOS can post whatever display it is using.

I'm not trying to fix the problem of getting early boot messages out
of a Mac with an x86 card plugged into it. The card will work after
early user space initializes. The right way to fix that would be to
switch to something like LinuxBIOS and build the x86 emulator into
it.

That still does not solve resume from suspend-to-RAM. We need to post
VGA there. We probably could do it late in userspace... but it makes
debugging resume pretty hard.
							Pavel
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