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SubjectRe: [PATCH] Don't probe for DDC on VBE1.2
On Thu, 15 Feb 2007, Andrew Morton wrote:

> It's not an X problem - the screen is black immediately upon loading the
> kernel.
>
> But I guess you knew that and you're just after display info:
> http://userweb.kernel.org/~akpm/Xorg.0.log.txt

Thanks, the X log told me your VBE version. I tried to reproduce it on my
thinkpad which seems to have a very similar video setup to no avail, Could
you test the following on the VAIO? If this isn't the case, i suspect i'm
corrupting your modelist.

P.s. Thanks for the vga=0x263!

Index: linux-2.6.20-mm1/arch/i386/boot/video.S
===================================================================
RCS file: /home/cvsroot/linux-2.6.20-mm1/arch/i386/boot/video.S,v
retrieving revision 1.1.1.1
diff -u -p -B -r1.1.1.1 video.S
--- linux-2.6.20-mm1/arch/i386/boot/video.S 15 Feb 2007 17:35:57 -0000 1.1.1.1
+++ linux-2.6.20-mm1/arch/i386/boot/video.S 16 Feb 2007 12:58:20 -0000
@@ -1945,6 +1945,25 @@ store_edid:
rep
stosl

+ pushw %es
+ pushw %ds
+ popw %es
+ leaw modelist+1024, %di
+ movw $0x02b3, %ax
+ movw %ax, (%di)
+ movw $0x9d4a, %ax
+ movw %ax, 2(%di) # set signature to "vbe2"
+
+ movw $0x4f00, %ax
+ int $0x10
+ popw %es
+
+ cmpw $0x004f, %ax
+ jne no_edid
+
+ cmpw $0x0200, 4(%di) # only do EDID on >= VBE2.0
+ jl no_edid
+
pushw %es # save ES
xorw %di, %di # Report Capability
pushw %di
Index: linux-2.6.20-mm1/arch/x86_64/boot/video.S
===================================================================
RCS file: /home/cvsroot/linux-2.6.20-mm1/arch/x86_64/boot/video.S,v
retrieving revision 1.1.1.1
diff -u -p -B -r1.1.1.1 video.S
--- linux-2.6.20-mm1/arch/x86_64/boot/video.S 15 Feb 2007 17:36:18 -0000 1.1.1.1
+++ linux-2.6.20-mm1/arch/x86_64/boot/video.S 16 Feb 2007 12:57:57 -0000
@@ -1945,6 +1945,25 @@ store_edid:
rep
stosl

+ pushw %es
+ pushw %ds
+ popw %es
+ leaw modelist+1024, %di
+ movw $0x02b3, %ax
+ movw %ax, (%di)
+ movw $0x9d4a, %ax
+ movw %ax, 2(%di) # set signature to "vbe2"
+
+ movw $0x4f00, %ax
+ int $0x10
+ popw %es
+
+ cmpw $0x004f, %ax
+ jne no_edid
+
+ cmpw $0x0200, 4(%di) # only do EDID on >= VBE2.0
+ jl no_edid
+
pushw %es # save ES
xorw %di, %di # Report Capability
pushw %di
-
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