I have prepared a change to the Debian package that will eliminate this
issue.
** Description changed:
- FreeCAD crashes at startup in Ubuntu 18.04.
+ [Impact]
- This is printed at the console:
+ * FreeCAD crashes at startup in Ubuntu 18.04.
+
+ * Backporting the proposed fix will prevent FreeCAD from crashing.
+
+ * The proposed upload will fix the issue by providing an environment
+ variable in the freecad.desktop file. This environment variable will set
+ LIBGL_DRI3_DISABLE=true.
+
+ [Test Case]
+
+ * On Ubuntu 18.04 with a system where a video card or some form of graphics
acceleration is used, install freecad and run normally.
+
+ This is printed at the console:
FreeCAD 0.16, Libs: 0.16R
© Juergen Riegel, Werner Mayer, Yorik van Havre 2001-2015
- ##### #### ### ####
- # # # # # #
- # ## #### #### # # # # #
- #### # # # # # # # ##### # #
- # # #### #### # # # # #
+ ##### #### ### ####
+ # # # # # #
+ # ## #### #### # # # # #
+ #### # # # # # # # ##### # #
+ # # #### #### # # # # #
# # # # # # # # # ## ## ##
# # #### #### ### # # #### ## ## ##
failed to create drawable
[xcb] Unknown sequence number while processing queue
[xcb] Most likely this is a multi-threaded client and XInitThreads has not
been called
[xcb] Aborting, sorry about that.
freecad: ../../src/xcb_io.c:259: poll_for_event: Zusicherung
»!xcb_xlib_threads_sequence_lost« nicht erfüllt.
Abgebrochen
+
+ [Regression Potential]
+
+ * An environment variable disabling LIBGL_DIR3 is set in the
+ freecad.desktop file. The affected functionality is limited to the
+ FreeCAD process and any child processes.
** Patch added: "freecad_0.16.6712+dfsg1-1ubuntu3.debdiff"
https://bugs.launchpad.net/ubuntu/+source/freecad/+bug/1754084/+attachment/5277684/+files/freecad_0.16.6712+dfsg1-1ubuntu3.debdiff
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https://bugs.launchpad.net/bugs/1754084
Title:
Freecad crashes at start
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