From 28f5da6da4761789612b5088aee6a34a75bab67e Mon Sep 17 00:00:00 2001
From: Andrey Arapov <andrey.arapov@nixaid.com>
Date: Thu, 19 May 2016 19:05:55 +0200
Subject: [PATCH] add a note regarding the /dev/shm RW and a webcam

---
 docker-compose.yml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/docker-compose.yml b/docker-compose.yml
index 48f1d8e..1310229 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -18,6 +18,10 @@ services:
     volumes:
       - /tmp/.X11-unix:/tmp/.X11-unix:ro
       - $XDG_RUNTIME_DIR/pulse:/run/user/1000/pulse
+      # /dev/shm must be RW, otherwise webcam (/dev/video0) won't work
+      # mplayer tv:// -tv driver=v4l2:width=640:height=480:device=/dev/video0
+      #   X11 error: BadAccess (attempt to access private resource denied)
+      #   X11 error: BadShmSeg (invalid shared segment parameter)
       - /dev/shm:/dev/shm
       - data:/data
       - certs:/home/user/.pki/nssdb