[systemd-devel] [PATCH] hwdb: Ignore brightness keys on Dell Inspiron 1520 to avoid double events

[Hans de Goede]

On the Dell Inspiron 1520 both the atkbd and acpi-video input devices report
an event for pressing the brightness up / down key-combos, resulting in user
space seeing double events and increasing / decreasing the brightness 2 steps
for each keypress.

This hwdb snippet suppresses the atkbd events, making the Inspiron 1520 work
like most modern laptops which emit brightness up / down events through
acpi-video only.

BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1141525
Cc: Pavel Malyshev <p.malishev at gmail.com>
Reported-by: Pavel Malyshev <p.malishev at gmail.com>
Signed-off-by: Hans de Goede <hdegoede at redhat.com>
---
 hwdb/60-keyboard.hwdb | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/hwdb/60-keyboard.hwdb b/hwdb/60-keyboard.hwdb
index 06caba9..d2ca965 100644
--- a/hwdb/60-keyboard.hwdb
+++ b/hwdb/60-keyboard.hwdb
@@ -230,6 +230,11 @@ keyboard:dmi:bvn*:bvr*:bd*:svnDell*:pnInspiron*1110:pvr*
 keyboard:dmi:bvn*:bvr*:bd*:svnDell*:pnInspiron*1210:pvr*
  KEYBOARD_KEY_84=wlan
 
+# Dell Inspiron 1520
+keyboard:dmi:bvn*:bvr*:bd*:svnDell*:pnInspiron*1520:pvr*
+ KEYBOARD_KEY_85=unknown  # Brightness Down, also emitted by acpi-video, ignore
+ KEYBOARD_KEY_86=unknown  # Brightness Up, also emitted by acpi-video, ignore
+
 # Latitude XT2
 keyboard:dmi:bvn*:bvr*:bd*:svnDell*:pnLatitude*XT2:pvr*
  KEYBOARD_KEY_9b=up                                     # tablet rocker up
-- 
2.1.0