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-rw-r--r--drivers/acpi/video.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index f6e54bf8dd9..64e3c581b7a 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -1109,7 +1109,12 @@ static int acpi_video_bus_check(struct acpi_video_bus *video)
*/
/* Does this device support video switching? */
- if (video->cap._DOS) {
+ if (video->cap._DOS || video->cap._DOD) {
+ if (!video->cap._DOS) {
+ printk(KERN_WARNING FW_BUG
+ "ACPI(%s) defines _DOD but not _DOS\n",
+ acpi_device_bid(video->device));
+ }
video->flags.multihead = 1;
status = 0;
}