From efa0d8aef94e8b71386aa28addd15197f04ccc5a Mon Sep 17 00:00:00 2001
From: Joe Thielen <joe@joethielen.com>
Date: Sat, 24 Sep 2016 12:38:18 -0400
Subject: [PATCH] Add fix for Linux HVM kernel error on bootup:   BUG: soft
 lockup - CPU#0 stuck for 23s! [systemd-udevd:244]

---
 managing-os/linux-hvm-tips.md | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/managing-os/linux-hvm-tips.md b/managing-os/linux-hvm-tips.md
index 53e56348..f07400d2 100644
--- a/managing-os/linux-hvm-tips.md
+++ b/managing-os/linux-hvm-tips.md
@@ -11,6 +11,41 @@ redirect_from:
 Tips for Linux in HVM domain
 ============================
 
+Fixing bootup kernel error `BUG: soft lockup - CPU#0 stuck for 23s! [systemd-udevd:244]`
+----------------------------------------------------------------------------------------
+*Tested with Qubes R3.2-RC3*
+Issue may be related to "bochs_drm" video driver. 
+
+To fix:
+
+1.  Edit the file /etc/default/grub
+2.  Find the line which starts:
+
+    ~~~
+    GRUB_CMDLINE_LINUX=
+    ~~~
+
+3.  Remove this text from that line:
+
+    ~~~
+    rhgb
+    ~~~
+
+4.  Add this text to that line:
+  
+    ~~~
+    modprobe.blacklist=bochs_drm
+    ~~~
+
+5. Run this command:
+
+    ~~~
+    grub2-mkconfig --output=/boot/grub2/grub.cfg
+    ~~~
+
+The HVM should no longer display the error if it's related to the "bochs_drm" kernel driver.
+
+
 Screen resolution
 -----------------