On Thu, 15 Feb 2007 08:29:49 -0800 (PST) Zwane Mwaikambo <[EMAIL PROTECTED]> wrote:
> 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 > > :( > > Much thanks to Tobias Hain for help in testing and investigating the bug. > Tested on; > > i386, Chips & Technologies 65548 VESA VBE 1.2 > CONFIG_VIDEO_SELECT=Y > CONFIG_FIRMWARE_EDID=Y > > Untested on x86_64. > > Signed-off-by: Zwane Mwaikambo <[EMAIL PROTECTED]> > > Index: linux-2.6.20-rc6-mm1/arch/i386/boot/video.S > =================================================================== > RCS file: /home/cvsroot/linux-2.6.20-rc6-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-rc6-mm1/arch/i386/boot/video.S 30 Jan 2007 05:28:31 > -0000 1.1.1.1 > +++ linux-2.6.20-rc6-mm1/arch/i386/boot/video.S 15 Feb 2007 16:27:32 > -0000 > @@ -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 > + je no_edid > + > pushw %es # save ES > xorw %di, %di # Report Capability > pushw %di This makes the long-suffering-but-vigorously-defended Vaio come up with a black display. Everything's working OK otherwise. Sort of a Black Screen of Life. I wouldn't call it an improvement though. - 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/
