H. Peter Anvin wrote: > Antonino A. Daplas wrote: >> On Wed, 2007-08-01 at 09:54 +0800, Antonino A. Daplas wrote: >>> On Tue, 2007-07-31 at 21:17 -0400, Daniel Drake wrote: >>>> Zwane Mwaikambo wrote: >>>>> Sorry if this has been hashed out before, but could you point me >>>>> towards the gentoo bugzilla entry? I'm trying to understand how >>>>> your setup broke. Which version VBE does your system have? >>>> Here's the bug: >>>> http://bugs.gentoo.org/show_bug.cgi?id=181067 >>>> >>> Looking at the dmesg output of the working and failing kernel, it does >>> seem that there's no EDID block available in the failing kernel. >>> >> >> BTW, I looked at the above bug report, it seems his last dmesg does not >> have fbcon enabled. Make sure that CONFIG_FRAMEBUFFER_CONSOLE=y before >> doing more tests (the problem of lack of the EDID block in the failing >> kernel still applies). >> > > Okay, I'm royally puzzled why that would be. I've gone over the code > quite a few times, and I do not see any way (other than VESA < 2.0) that > could cause that. > > I look forward to getting the debug output; depending on what it is we > might have to get some debugging output from the setup code. > > We can printf in the new setup code, although obviously that requires > leaving the screen in text mode. However, EDID information should still > be available. > How about this patch?
Tony --- Subject: video setup: Fix VBE DDC reading Add memory operand constraint and write-only modifier to the inline assembly to effect the writing of the EDID block to boot_params.edid_info. Signed-off-by: Antonino Daplas <[EMAIL PROTECTED]> --- arch/i386/boot/video-vesa.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/i386/boot/video-vesa.c b/arch/i386/boot/video-vesa.c index e6aa9eb..f1bc71e 100644 --- a/arch/i386/boot/video-vesa.c +++ b/arch/i386/boot/video-vesa.c @@ -268,7 +268,7 @@ #ifdef CONFIG_FIRMWARE_EDID dx = 0; /* EDID block number */ di =(size_t) &boot_params.edid_info; /* (ES:)Pointer to block */ asm(INT10 - : "+a" (ax), "+b" (bx), "+d" (dx) + : "+a" (ax), "+b" (bx), "+d" (dx), "=m" (boot_params.edid_info) : "c" (cx), "D" (di) : "esi"); #endif /* CONFIG_FIRMWARE_EDID */ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/