Checking drivers/acpi/video.c also found it outputs a warning message
but with no control flow changes as below:
static int acpi_video_bus_check(struct acpi_video_bus *video)
{
...
/* Does this device support video switching? */
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;
}
}
Therefore it is safe to ignore it. We will also investigate whether it
is appropriate to lower the severity in fwts.
...
** Changed in: linux-lts-raring (Ubuntu)
Status: In Progress => Triaged
** Changed in: linux-lts-raring (Ubuntu)
Importance: Undecided => Low
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https://bugs.launchpad.net/bugs/1249978
Title:
[Dell Latitude E6440] [Firmware Bug]: ACPI(PEGP) defines _DOD but not
_DOS
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