diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
index 167d0446f560..e26ae1d917ea 100644
--- a/drivers/platform/x86/acer-wmi.c
+++ b/drivers/platform/x86/acer-wmi.c
@@ -233,6 +233,7 @@ static int mailled = -1;
 static int brightness = -1;
 static int threeg = -1;
 static int force_series;
+static int force_caps = -1;
 static bool ec_raw_mode;
 static bool has_type_aa;
 static u16 commun_func_bitmap;
@@ -242,11 +243,13 @@ module_param(mailled, int, 0444);
 module_param(brightness, int, 0444);
 module_param(threeg, int, 0444);
 module_param(force_series, int, 0444);
+module_param(force_caps, int, 0444);
 module_param(ec_raw_mode, bool, 0444);
 MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
 MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
 MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
 MODULE_PARM_DESC(force_series, "Force a different laptop series");
+MODULE_PARM_DESC(force_caps, "Force the capability bitmask to this value");
 MODULE_PARM_DESC(ec_raw_mode, "Enable EC raw mode");
 
 struct acer_data {
@@ -2169,7 +2172,7 @@ static int __init acer_wmi_init(void)
 		}
 		/* WMID always provides brightness methods */
 		interface->capability |= ACER_CAP_BRIGHTNESS;
-	} else if (!wmi_has_guid(WMID_GUID2) && interface && !has_type_aa) {
+	} else if (!wmi_has_guid(WMID_GUID2) && interface && !has_type_aa && force_caps == -1) {
 		pr_err("No WMID device detection method found\n");
 		return -ENODEV;
 	}
@@ -2199,6 +2202,9 @@ static int __init acer_wmi_init(void)
 	if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
 		interface->capability &= ~ACER_CAP_BRIGHTNESS;
 
+	if (force_caps != -1)
+		interface->capability = force_caps;
+
 	if (wmi_has_guid(WMID_GUID3)) {
 		if (ACPI_FAILURE(acer_wmi_enable_rf_button()))
 			pr_warn("Cannot enable RF Button Driver\n");