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--- doc:lighthouse:setup [2019-04-03 15:42]
macke
+++ doc:lighthouse:setup [2019-04-04 11:24]
arnaud [Setting up SteamVR without Head Mounted Display]
@@ Line 28: / Line 28: @@
 ''openvr.OpenVRError: b'VRInitError_Init_VRClientDLLNotFound' (error number 102)''
+Or this when running the script from the Crazyflie firmware repos:
+<code>
+$ python3 get_bs_position.py
+Openning OpenVR
+python3: Relink `/lib/x86_64-linux-gnu/libudev.so.1' with `/lib/x86_64-linux-gnu/librt.so.1' for IFUNC symbol `clock_gettime'
+Segmentation fault (core dumped)
+</code>
 Then you are maybe missing some essential packages for openvr:
@@ Line 34: / Line 43: @@
   * libvulkan-dev
   * libsdl2-dev
+On Ubuntu:
+<code>
+$ sudo apt-get install libudev-dev  libvulkan-dev  libsdl2-dev
+$ python3 -m pip uninstall openvr
+$ python3 -m pip install openvr
+</code>
 if this still doesn't work, please check this forum-thread for other options:
 [[https://github.com/cmbruns/pyopenvr/issues/30]]
+</WRAP>
+<WRAP center round info>
+**Troubleshooting²**
+When running SteamVR on Linux, by default the access right to USB device might not be configured right. If you have problem connecting the tracker/controller/HMD you can add a udev rules that gives full access to any USB Valve hardware to all users on your system:
+<code>
+# cat > /etc/udev/rules.d/99-steamvr.rules << EOF
+KERNEL="hidraw*", ATTRS{idVendor}=="28de", MODE=="0666"
+EOF
+</code>
+You may need to restart SteamVR to see the connected devices.
 </WRAP>

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