diff --git a/dell/xps/13-7390/README.wiki b/dell/xps/13-7390/README.wiki
index 6ec37d0..64b8af6 100644
--- a/dell/xps/13-7390/README.wiki
+++ b/dell/xps/13-7390/README.wiki
@@ -4,6 +4,16 @@
 
 You need to disable RAID and use AHCI instead as described [https://wiki.ubuntu.com/Dell/XPS/XPS-13-7390-2-in-1 here].
 
+== Known Issues ==
+
+If your BIOS version is greater than or equal to 1.0.13, you may need to add 
+
+<code>
+systemd.sleep.extraConfig = "SuspendState=freeze";
+</code>
+
+to your <code>configuration.nix</code> if you cannot wake from "Sleep". See reference [https://askubuntu.com/a/1194128 here].
+
 == Firmware upgrades ==
 
 Note that this device is supported by [https://fwupd.org/ fwupd].