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authorOndrej Zary <linux@rainbow-software.org>2012-12-11 22:18:05 +0100
committerH. Peter Anvin <hpa@linux.intel.com>2012-12-11 14:55:16 -0800
commitad68652412276f68ad4fe3e1ecf5ee6880876783 (patch)
tree0a030db11ef21d5091215be914832ed54fdcb859 /Documentation/x86
parent29594404d7fe73cd80eaa4ee8c43dcc53970c60e (diff)
x86, 8042: Enable A20 using KBC to fix S3 resume on some MSI laptops
Some MSI laptop BIOSes are broken - INT 15h code uses port 92h to enable A20 line but resume code assumes that KBC was used. The laptop will not resume from S3 otherwise but powers off after a while and then powers on again stuck with a blank screen. Fix it by enabling A20 using KBC in i8042_platform_init for x86. Fixes https://bugzilla.kernel.org/show_bug.cgi?id=12878 Signed-off-by: Ondrej Zary <linux@rainbow-software.org> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: <stable@vger.kernel.org> Link: http://lkml.kernel.org/r/201212112218.06551.linux@rainbow-software.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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