linux-kernel - Re: Framebuffer issues in 2.6.26 with uvesafb and vesafb. Linux is about choice!

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Message-Id: <200810231322.15257.alistair@devzero.co.uk>
Date:	Thu, 23 Oct 2008 13:22:15 +0100
From:	Alistair John Strachan <alistair@...zero.co.uk>
To:	"Robert Moss" <robert.von.moss@...il.com>,
	"H. Peter Anvin" <hpa@...or.com>
Cc:	"Samuel Thibault" <samuel.thibault@...-lyon.org>,
	linux-kernel@...r.kernel.org
Subject: Re: Framebuffer issues in 2.6.26 with uvesafb and vesafb. Linux is about choice!

On Thursday 23 October 2008 12:21:09 Robert Moss wrote:
> I also want to note, that I downloaded 2.6.27.3 and compiled, with
> CONFIG_FB_VESA=Y, and still get excactly the same response as from
> 2.6.26

Useful info, and I checked your configs and they enable the right options. 
Looks like you've found a real bug.

IIRC, a lot of real mode assembler (including the x86 vga/vesa stuff, iirc) 
was rewritten a year or so ago, in C. This might have been the time that this 
bug was introduced. I've added hpa to CC since I believe he was the author of 
these changes.

(Summary of the original report is that vga= vesa mode selection seems to have 
broken for Robert since at least 2.6.26, and after 2.6.24. From what I can see 
he has the right vesafb options enabled.)

> Screen unavailable [or not found, im not sure] 317.  (which i believe
> is 0x317 = 791)

I grepped the tree for "Screen unavailable" and "Screen not found" and found 
nothing. Could you please reproduce the message and confirm which exactly it 
is?

-- 
Cheers,
Alistair.
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