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-rw-r--r--drivers/acpi/video.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index debd30917010..5f98ac69729a 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -2176,6 +2176,17 @@ EXPORT_SYMBOL(acpi_video_unregister_backlight);
static int __init acpi_video_init(void)
{
+ /*
+ * Let the module load even if ACPI is disabled (e.g. due to
+ * a broken BIOS) so that i915.ko can still be loaded on such
+ * old systems without an AcpiOpRegion.
+ *
+ * acpi_video_register() will report -ENODEV later as well due
+ * to acpi_disabled when i915.ko tries to register itself afterwards.
+ */
+ if (acpi_disabled)
+ return 0;
+
dmi_check_system(video_dmi_table);
if (intel_opregion_present())