From 516448a69674b4879c296d72e4eebcc2e890c72f Mon Sep 17 00:00:00 2001
From: John Goerzen <jgoerzen@complete.org>
Date: Thu, 8 Aug 2024 17:06:32 -0500
Subject: [PATCH 1/2] Document USB issues in README.md

---
 README.md | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/README.md b/README.md
index a50cb92c..ccdfb571 100644
--- a/README.md
+++ b/README.md
@@ -73,6 +73,13 @@ or on Arch with
 sudo pacman -S python-pipx
 ```
 
+You will also need the USB development libraries; on Ubuntu/Debian, install
+with
+
+```bash
+sudo apt-get  --no-install-recommends install libusb-1.0-0
+```
+
 By default, users don't have permission to access generic USB devices, so you will
 need to add a rule. The first time you run `labelle`, it will give instructions
 about how to do this:

From 9a251e2e594dbe06141d02a6ef6413ee8289a19b Mon Sep 17 00:00:00 2001
From: Ben Mares <services-git-throwaway1@tensorial.com>
Date: Sat, 28 Sep 2024 16:30:22 +0000
Subject: [PATCH 2/2] Mention the actual error when libusb is missing

---
 README.md | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index ccdfb571..5df2fbdb 100644
--- a/README.md
+++ b/README.md
@@ -73,8 +73,14 @@ or on Arch with
 sudo pacman -S python-pipx
 ```
 
-You will also need the USB development libraries; on Ubuntu/Debian, install
-with
+In case the USB development libraries are not already installed, you may see an
+error like
+
+```python
+DeviceManagerError: Failed scanning devices: No backend available
+```
+
+To fix this, on Ubuntu/Debian, install with
 
 ```bash
 sudo apt-get  --no-install-recommends install libusb-1.0-0