Restore _DOS (Enable/Disable Output Switching) to their default/initial
value at video module unload.
Change allows to function properly a display switch after unload of the
module.
--- linux-3.16.org/drivers/acpi/video.c 2014-08-03 22:25:02.000000000
+0000
+++ linux-3.16/drivers/acpi/video.c 2014-08-12 12:24:18.754029732 +0000
@@ -1551,8 +1551,7 @@
static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
{
- return acpi_video_bus_DOS(video, 0,
- acpi_osi_is_win8() ? 0 : 1);
+ return acpi_video_bus_DOS(video, 1, 0);
}
static void acpi_video_bus_notify(struct acpi_device *device, u32 event)
--
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