Index: PowerDevilSettings.kcfg
===================================================================
--- PowerDevilSettings.kcfg
+++ PowerDevilSettings.kcfg
@@ -22,6 +22,9 @@
     <entry name="brightnessAnimationThreshold" type="Int">
       <default>100</default>
     </entry>
+    <entry name="quadBrightness" type="Bool">
+      <default>false</default>
+    </entry>
   </group>
 
   <group name="BatteryManagement">
Index: daemon/powerdevilbrightnesslogic.cpp
===================================================================
--- daemon/powerdevilbrightnesslogic.cpp
+++ daemon/powerdevilbrightnesslogic.cpp
@@ -19,6 +19,9 @@
 
 #include "powerdevilbrightnesslogic.h"
 #include "powerdevilbackendinterface.h"
+#include "PowerDevilSettings.h"
+
+#include <QtMath>
 
 namespace PowerDevil
 {
@@ -60,13 +63,7 @@
     }
 
     // Add 1 and round upwards to the nearest step
-    int step = m_steps - (m_valueMax - m_value - 1) * m_steps / m_valueMax;
-
-    if (m_valueMax > 100 && qRound(percentage(stepToValue(step))) <= qRound(percentage(m_value))) {
-        // When no visible change was made, add 1 step.
-        // This can happen only if valueMax > 100, else 1 >= 1%.
-        step++;
-    }
+    int step = valueToStep(m_value) + 1;
 
     return stepToValue(step);
 }
@@ -78,13 +75,7 @@
     }
 
     // Subtract 1 and round downwards to the nearest Step
-    int step = (m_value - 1) * m_steps / m_valueMax;
-
-    if (m_valueMax > 100 && qRound(percentage(stepToValue(step))) >= qRound(percentage(m_value))) {
-        // When no visible change was made, subtract 1 step.
-        // This can happen only if valueMax > 100, else 1 >= 1%.
-        step--;
-    }
+    int step = valueToStep(m_value) - 1;
 
     return stepToValue(step);
 }
@@ -124,11 +115,17 @@
 
 int BrightnessLogic::stepToValue(int step) const
 {
+    if(PowerDevilSettings::quadBrightness()) {
+        return qBound(0, qRound(m_valueMax * 1.0 * (step * step) / (m_steps * m_steps)), m_valueMax);
+    }
     return qBound(0, qRound(step * 1.0 * m_valueMax / m_steps), m_valueMax);
 }
 
 int BrightnessLogic::valueToStep(int value) const
 {
+    if(PowerDevilSettings::quadBrightness()) {
+        return qBound(0, qRound(qSqrt(value * 1.0 * (m_steps * m_steps) / m_valueMax)), m_steps);
+    }
     return qBound(0, qRound(value * 1.0 * m_steps / m_valueMax), m_steps);
 }
 
Index: kcmodule/global/GeneralPage.cpp
===================================================================
--- kcmodule/global/GeneralPage.cpp
+++ kcmodule/global/GeneralPage.cpp
@@ -124,6 +124,8 @@
     connect(BatteryCriticalCombo, SIGNAL(currentIndexChanged(int)), SLOT(changed()));
 
     connect(pausePlayersCheckBox, SIGNAL(stateChanged(int)), SLOT(changed()));
+    
+    connect(quadBrightnessCheckBox, SIGNAL(stateChanged(int)), SLOT(changed()));
 
     if (!hasPowerSupplyBattery) {
         BatteryCriticalLabel->hide();
@@ -153,6 +155,8 @@
     BatteryCriticalCombo->setCurrentIndex(BatteryCriticalCombo->findData(PowerDevilSettings::batteryCriticalAction()));
 
     pausePlayersCheckBox->setChecked(PowerDevilSettings::pausePlayersOnSuspend());
+    
+    quadBrightnessCheckBox->setChecked(PowerDevilSettings::quadBrightness());
 }
 
 void GeneralPage::configureNotifications()
@@ -169,6 +173,8 @@
     PowerDevilSettings::setBatteryCriticalAction(BatteryCriticalCombo->itemData(BatteryCriticalCombo->currentIndex()).toInt());
 
     PowerDevilSettings::setPausePlayersOnSuspend(pausePlayersCheckBox->checkState() == Qt::Checked);
+    
+    PowerDevilSettings::setQuadBrightness(quadBrightnessCheckBox->checkState() == Qt::Checked);
 
     PowerDevilSettings::self()->save();
 
Index: kcmodule/global/generalPage.ui
===================================================================
--- kcmodule/global/generalPage.ui
+++ kcmodule/global/generalPage.ui
@@ -113,7 +113,24 @@
        </property>
       </widget>
      </item>
-     <item row="6" column="0">
+     <item row="4" column="0">
+      <widget class="QLabel" name="lowPeripheralLabel">
+       <property name="text">
+        <string>Low level for peripheral devices:</string>
+       </property>
+      </widget>
+     </item>
+     <item row="4" column="1">
+      <widget class="QSpinBox" name="lowPeripheralSpin">
+       <property name="suffix">
+        <string>%</string>
+       </property>
+       <property name="maximum">
+        <number>100</number>
+       </property>
+      </widget>
+     </item>
+     <item row="5" column="0">
       <spacer name="verticalSpacer_2">
        <property name="orientation">
         <enum>Qt::Vertical</enum>
@@ -126,6 +143,33 @@
        </property>
       </spacer>
      </item>
+     <item row="6" column="0">
+      <widget class="QLabel" name="pausePlayersLabel">
+       <property name="text">
+        <string>Pause media players when suspending:</string>
+       </property>
+      </widget>
+     </item>
+     <item row="6" column="1">
+      <widget class="QCheckBox" name="pausePlayersCheckBox">
+       <property name="text">
+        <string>Enabled</string>
+       </property>
+      </widget>
+     </item>
+     <item row="8" column="0">
+      <spacer name="verticalSpacer">
+       <property name="orientation">
+        <enum>Qt::Vertical</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>20</width>
+         <height>16</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
      <item row="9" column="1">
       <widget class="QPushButton" name="notificationsButton">
        <property name="sizePolicy">
@@ -145,37 +189,20 @@
        </property>
       </widget>
      </item>
-     <item row="4" column="0">
-      <widget class="QLabel" name="lowPeripheralLabel">
+     <item row="7" column="0">
+      <widget class="QLabel" name="quadBrightnessLabel">
        <property name="text">
-        <string>Low level for peripheral devices:</string>
-       </property>
-      </widget>
-     </item>
-     <item row="4" column="1">
-      <widget class="QSpinBox" name="lowPeripheralSpin">
-       <property name="suffix">
-        <string>%</string>
-       </property>
-       <property name="maximum">
-        <number>100</number>
+        <string>Use quadratic curve for brightness keys:</string>
        </property>
       </widget>
      </item>
-     <item row="8" column="1">
-      <widget class="QCheckBox" name="pausePlayersCheckBox">
+     <item row="7" column="1">
+      <widget class="QCheckBox" name="quadBrightnessCheckBox">
        <property name="text">
         <string>Enabled</string>
        </property>
       </widget>
      </item>
-     <item row="8" column="0">
-      <widget class="QLabel" name="pausePlayersLabel">
-       <property name="text">
-        <string>Pause media players when suspending:</string>
-       </property>
-      </widget>
-     </item>
     </layout>
    </item>
    <item>