diff --git a/installing/upgrade-to-r3.1.md b/installing/upgrade-to-r3.1.md
index 6b3e7700..9df513e6 100644
--- a/installing/upgrade-to-r3.1.md
+++ b/installing/upgrade-to-r3.1.md
@@ -57,9 +57,6 @@ Manager's right-click menu and choose Run Command in VM and type
         sudo apt-get update
         sudo apt-get dist-upgrade
 
-    There will be some error messages during the process, but our tests does
-    not revealed any negative consequences.
-
 4.  Shutdown the template VM.
 
 Upgrading dom0
@@ -75,6 +72,8 @@ them again.
 
         sudo qubes-dom0-update --releasever=3.1
 
+    After this step, until you reboot the system, most of the qvm-* tools will not work.
+
 3.  If above step completed successfully you should have `qubes-core-dom0` at
 least 3.1.4. If not, repeat above step with additional `--clean` option.
 
diff --git a/releases/3.1/release-notes.md b/releases/3.1/release-notes.md
index 38041a0b..e22356e5 100644
--- a/releases/3.1/release-notes.md
+++ b/releases/3.1/release-notes.md
@@ -32,6 +32,12 @@ Known issues
 
 * Some icons in the Qubes Manager application might not be drawn correctly when using the Xfce4 environment in Dom0. If this bothers you, please use the KDE environment instead.
 
+* USB VM may hang after resume. Fix: add `ehci_pci` and `xhci_pci` to `/rw/config/suspend-module-blacklist` in the `sys-usb` VM.
+
+* USB mouse (in case of USB VM) does not work at first system startup (just after completing firstboot). Workaround: restart the system.
+
+* Dom0 locale is reset to `en_US` after installation. Workaround: set locale back to the desired value.
+
 * For other known issues take a look at [our tickets](https://github.com/QubesOS/qubes-issues/issues?q=is%3Aopen+is%3Aissue+milestone%3A%22Release+3.1%22+label%3Abug)
 
 It is advised to install updates just after system installation to apply bug fixes for (some of) the above problems.