diff --git a/CHANGELOG.md b/CHANGELOG.md
index 40ca43c..b95f345 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -100,6 +100,7 @@ Other changes
 
 | Version        | Date           | Comment  |
 | -------------- | -------------- | -------- |
+| 3.52.4         | 2018-12-27     | `graphics().controllers` bugfix linux |
 | 3.52.3         | 2018-12-27     | `os().codepage` bugfix |
 | 3.52.2         | 2018-12-17     | code cleanup |
 | 3.52.1         | 2018-12-17     | `inetChecksite()` bugfix windows |
diff --git a/lib/graphics.js b/lib/graphics.js
index 267c6f0..101c478 100644
--- a/lib/graphics.js
+++ b/lib/graphics.js
@@ -13,6 +13,7 @@
 // ----------------------------------------------------------------------------------
 
 const exec = require('child_process').exec;
+const execSync = require('child_process').execSync;
 const util = require('./util');
 
 let _platform = process.platform;
@@ -123,10 +124,24 @@ function graphics(callback) {
     let controllers = [];
     let currentController = {};
     let isGraphicsController = false;
+    // PCI bus IDs
+    let pciIDs = [];
+    try {
+      pciIDs = execSync('dmidecode -t 9 | grep "Bus Address: "').toString().split('\n');
+      for (let i = 0; i < pciIDs.length; i++) {
+        pciIDs[i] = pciIDs[i].replace('Bus Address:', '').replace('0000:', '').trim();
+      }
+      pciIDs = pciIDs.filter(function (el) {
+        return el != null && el;
+      });
+    } catch (e) {
+      util.noop();
+    }
     for (let i = 0; i < lines.length; i++) {
       if ('' !== lines[i].trim()) {
         if (' ' !== lines[i][0] && '\t' !== lines[i][0]) {        // first line of new entry
-          let vgapos = lines[i].toLowerCase().indexOf('vga');
+          let isExternal = (pciIDs.indexOf(lines[i].split(' ')[0]) >= 0);
+          let vgapos = lines[i].toLowerCase().indexOf(' vga ');
           let _3dcontrollerpos = lines[i].toLowerCase().indexOf('3d controller');
           if (vgapos !== -1 || _3dcontrollerpos !== -1) {         // VGA
             if (_3dcontrollerpos !== -1 && vgapos === -1) {
@@ -144,20 +159,28 @@ function graphics(callback) {
               if (parts[1].toLowerCase().indexOf('corporation') >= 0) {
                 currentController.vendor = parts[1].substr(0, parts[1].toLowerCase().indexOf('corporation') + 11).trim();
                 currentController.model = parts[1].substr(parts[1].toLowerCase().indexOf('corporation') + 11, 200).trim().split('(')[0];
-                currentController.bus = '';
+                currentController.bus = (pciIDs.length > 0 && isExternal) ? 'PCIe' : 'Onboard';
                 currentController.vram = -1;
                 currentController.vramDynamic = false;
               } else if (parts[1].toLowerCase().indexOf(' inc.') >= 0) {
                 if ((parts[1].match(new RegExp(']', 'g')) || []).length > 1) {
                   currentController.vendor = parts[1].substr(0, parts[1].toLowerCase().indexOf(']') + 1).trim();
-                  currentController.model = parts[1].substr(parts[1].toLowerCase().indexOf(']') + 1, 200).trim().split('(')[0];
+                  currentController.model = parts[1].substr(parts[1].toLowerCase().indexOf(']') + 1, 200).trim().split('(')[0].trim();
                 } else {
                   currentController.vendor = parts[1].substr(0, parts[1].toLowerCase().indexOf(' inc.') + 5).trim();
-                  currentController.model = parts[1].substr(parts[1].toLowerCase().indexOf(' inc.') + 5, 200).trim().split('(')[0];
+                  currentController.model = parts[1].substr(parts[1].toLowerCase().indexOf(' inc.') + 5, 200).trim().split('(')[0].trim();
                 }
-                currentController.bus = '';
+                currentController.bus = (pciIDs.length > 0 && isExternal) ? 'PCIe' : 'Onboard';
                 currentController.vram = -1;
                 currentController.vramDynamic = false;
+              } else if (parts[1].toLowerCase().indexOf(' ltd.') >= 0) {
+                if ((parts[1].match(new RegExp(']', 'g')) || []).length > 1) {
+                  currentController.vendor = parts[1].substr(0, parts[1].toLowerCase().indexOf(']') + 1).trim();
+                  currentController.model = parts[1].substr(parts[1].toLowerCase().indexOf(']') + 1, 200).trim().split('(')[0].trim();
+                } else {
+                  currentController.vendor = parts[1].substr(0, parts[1].toLowerCase().indexOf(' ltd.') + 5).trim();
+                  currentController.model = parts[1].substr(parts[1].toLowerCase().indexOf(' ltd.') + 5, 200).trim().split('(')[0].trim();
+                }
               }
             }
 
@@ -167,7 +190,7 @@ function graphics(callback) {
         }
         if (isGraphicsController) { // within VGA details
           let parts = lines[i].split(':');
-          if (parts.length > 1 && parts[0].replace(/ +/g, '').toLowerCase().indexOf('devicename') !== -1 && parts[0].toLowerCase().indexOf('onboard') !== -1) currentController.bus = 'Onboard';
+          if (parts.length > 1 && parts[0].replace(/ +/g, '').toLowerCase().indexOf('devicename') !== -1 && parts[1].toLowerCase().indexOf('onboard') !== -1) currentController.bus = 'Onboard';
           if (parts.length > 1 && parts[0].replace(/ +/g, '').toLowerCase().indexOf('region') !== -1 && parts[1].toLowerCase().indexOf('memory') !== -1) {
             let memparts = parts[1].split('=');
             if (memparts.length > 1) {