diff options
| author | Ondrej Zary <linux@rainbow-software.org> | 2012-12-11 22:18:05 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-01-11 09:18:17 -0800 |
| commit | 2dfc7a391af637b6a820c0ded3964c2b9efd417f (patch) | |
| tree | 98d5eaf5d4cebca16da638565a4eec703d298c7c /mm | |
| parent | 7dafc8952dc0964cead9646039a8d66a9ed4cf73 (diff) | |
x86, 8042: Enable A20 using KBC to fix S3 resume on some MSI laptops
commit ad68652412276f68ad4fe3e1ecf5ee6880876783 upstream.
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>
Link: http://lkml.kernel.org/r/201212112218.06551.linux@rainbow-software.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions