From 85dd689ff9d48f7adaee8328456c6677213c9c62 Mon Sep 17 00:00:00 2001 From: Gabriel Jacobo Date: Thu, 14 Nov 2013 10:19:07 -0300 Subject: [PATCH] Adds joystick/udev troubleshooting information to README-linux.txt --- README-linux.txt | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) diff --git a/README-linux.txt b/README-linux.txt index d147b16f3..e0f029d81 100644 --- a/README-linux.txt +++ b/README-linux.txt @@ -30,3 +30,51 @@ NOTES: configure script to include DirectFB support. Send patches. :) +================================================================================ +Joystick does not work +================================================================================ + +If you compiled or are using a version of SDL with udev support (and you should!) +there's a few issues that may cause SDL to fail to detect your joystick. To +debug this, start by installing the evtest utility. On Ubuntu/Debian: + + sudo apt-get install evtest + +Then run: + + sudo evtest + +You'll hopefully see your joystick listed along with a name like "/dev/input/eventXX" +Now run: + + cat /dev/input/event/XX + +If you get a permission error, you need to set a udev rule to change the mode of +your device (see below) + +Also, try: + + sudo udevadm info --query=all --name=input/eventXX + +If you see a line stating ID_INPUT_JOYSTICK=1, great, if you don't see it, +you need to set up an udev rule to force this variable. + +A combined rule for the Saitek Pro Flight Rudder Pedals to fix both issues looks +like: + + SUBSYSTEM=="input", ATTRS{idProduct}=="0763", ATTRS{idVendor}=="06a3", MODE="0666", ENV{ID_INPUT_JOYSTICK}="1" + SUBSYSTEM=="input", ATTRS{idProduct}=="0764", ATTRS{idVendor}=="06a3", MODE="0666", ENV{ID_INPUT_JOYSTICK}="1" + +You can set up similar rules for your device by changing the values listed in +idProduct and idVendor. To obtain these values, try: + + sudo udevadm info -a --name=input/eventXX | grep idVendor + sudo udevadm info -a --name=input/eventXX | grep idProduct + +If multiple values come up for each of these, the one you want is the first one of each. + +On other systems which ship with an older udev (such as CentOS), you may need +to set up a rule such as: + + SUBSYSTEM=="input", ENV{ID_CLASS}=="joystick", ENV{ID_INPUT_JOYSTICK}="1" +