The patch titled
x86: don't probe for DDC on VBE1.2
has been added to the -mm tree. Its filename is
x86-dont-probe-for-ddc-on-vbe12.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: x86: don't probe for DDC on VBE1.2
From: Zwane Mwaikambo <zwane@xxxxxxxxxxxxx>
VBE1.2 doesn't support function 15h (DDC) resulting in a 'hang' whilst
uncompressing kernel with some video cards. Make sure we check VBE version
before fiddling around with DDC.
http://bugzilla.kernel.org/show_bug.cgi?id=1458
Opened: 2003-10-30 09:12 Last update: 2007-02-13 22:03
:(
Signed-off-by: Zwane Mwaikambo <zwane@xxxxxxxxxxxxx>
Cc: Randy Dunlap <randy.dunlap@xxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxx>
Cc: Tobias Hain <tobias.hain@xxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/i386/boot/video.S | 14 ++++++++++++++
arch/x86_64/boot/video.S | 14 ++++++++++++++
2 files changed, 28 insertions(+)
diff -puN arch/i386/boot/video.S~x86-dont-probe-for-ddc-on-vbe12 arch/i386/boot/video.S
--- a/arch/i386/boot/video.S~x86-dont-probe-for-ddc-on-vbe12
+++ a/arch/i386/boot/video.S
@@ -1945,6 +1945,20 @@ store_edid:
rep
stosl
+ pushw %es
+ pushw %ds
+ popw %es
+ leaw modelist+1024, %di
+ movw $0x4f00, %ax
+ int $0x10
+ popw %es
+
+ cmpw $0x004f, %ax
+ jne no_edid
+
+ cmpw $0x0102, 4(%di) # only do EDID on > 1.2
+ jle no_edid
+
pushw %es # save ES
xorw %di, %di # Report Capability
pushw %di
diff -puN arch/x86_64/boot/video.S~x86-dont-probe-for-ddc-on-vbe12 arch/x86_64/boot/video.S
--- a/arch/x86_64/boot/video.S~x86-dont-probe-for-ddc-on-vbe12
+++ a/arch/x86_64/boot/video.S
@@ -1945,6 +1945,20 @@ store_edid:
rep
stosl
+ pushw %es
+ pushw %ds
+ popw %es
+ leaw modelist+1024, %di
+ movw $0x4f00, %ax
+ int $0x10
+ popw %es
+
+ cmpw $0x004f, %ax
+ jne no_edid
+
+ cmpw $0x0102, 4(%di) # only do EDID on > 1.2
+ jle no_edid
+
pushw %es # save ES
xorw %di, %di # Report Capability
pushw %di
_
Patches currently in -mm which might be from zwane@xxxxxxxxxxxxx are
git-agpgart.patch
fix-mtrr-compat-ioctl.patch
x86-dont-probe-for-ddc-on-vbe12.patch
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