Known Issues

Post here for help on using FreeCAD's graphical user interface (GUI).
chrisb
Posts: 12680
Joined: Tue Mar 17, 2015 9:14 am

Known Issues

Postby chrisb » Wed Aug 29, 2018 6:38 am

This topic is locked. For comments go to https://forum.freecadweb.org/viewtopic.php?f=3&t=30574
  • Startup fails on Debian based system like Ubuntu, Debian, Mint, ...
    FreeCAD startup may fail with the message

    Code: Select all

    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: xcb_io.c:259: poll_for_event: Assertion `!xcb_xlib_threads_sequence_lost' failed.
    Aborted
    gntech recommends
    gntech wrote:
    Thu Apr 12, 2018 6:04 pm
    A workaround is to disable DRI3 just for Freecad by launching freecad from the terminal with the following command.

    Code: Select all

    LIBGL_DRI3_DISABLE=true freecad
  • Crash on Debian based systems importing SVG
    FreeCAD can crash when importing SVG files with a message like
    jalar wrote:
    Wed Jan 10, 2018 1:19 pm

    Code: Select all

    openat(AT_FDCWD, "/path-to-file.svg", O_RDONLY) = 27
    fstat(27, {st_mode=S_IFREG|0644, st_size=2234752, ...}) = 0
    --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x3a9} ---
    write(2, "\33[1;31m", 7)                = 7
    write(2, "Program received signal SIGSEGV,"..., 53Program received signal SIGSEGV, Segmentation fault.
    ) = 53
    
    #0  /lib/x86_64-linux-gnu/libc.so.6(+0x37140) [0x7fd97f382140]
    #1  /lib/x86_64-linux-gnu/libexpat.so.1(XML_SetHashSalt+0x1b) [0x7fd976c411cb]
    #2  /usr/lib/python2.7/lib-dynload/pyexpat.x86_64-linux-gnu.so(+0x6968) [0x7fd90487a968]
    ...
    
    As a solution some libraries have to be installed manually:
    Chris_G wrote:
    Thu Apr 19, 2018 8:45 am
    The packages from Ubuntu xenial work fine :
    https://packages.ubuntu.com/xenial/expat
    https://packages.ubuntu.com/xenial/libexpat1
    I have also this one, but I don't know if it is really needed :
    https://packages.ubuntu.com/xenial/libexpat1-dev

    Then in the folder where you downloaded the packages :

    Code: Select all

    sudo dpkg -i ./expat_2.1.0-7ubuntu0.16.04.3_amd64.deb
    sudo echo expat hold | sudo dpkg --set-selections
    sudo dpkg -i ./libexpat1_2.1.0-7ubuntu0.16.04.3_amd64.deb
    sudo echo libexpat1 hold | sudo dpkg --set-selections
    sudo dpkg -i ./libexpat1-dev_2.1.0-7ubuntu0.16.04.3_amd64.deb
    sudo echo libexpat1-dev hold | sudo dpkg --set-selections
    
  • Windows display driver
    There are issues with Radeon graphic cards. If your objects show transparency where they should not, it may be caused by the Radeon driver.
    SirSpamalot wrote:
    Tue Aug 28, 2018 10:46 pm
    I have a Radeon RX 460 card. It appears that I updated the driver on July 23, 2018. The updated driver was version 24.20.12019.1010 (from Radeon Driver Package 18.7.1). I rolled it back to the version that was previously installed, 21.19.407.0, and that resolved the problem. I then rolled it forward to 24.20.11016.4 (from Radeon Driver Package 18.5.1) and I still don't have the problem. Yay!
    Here is another report of issues with a Radeon 5470 and a driver solving it: https://forum.freecadweb.org/viewtopic. ... 44#p264835

    A user from the german forum has successfully installed the current driver version 18.12.2 including. Relive für his Radeon R9 380.

  • MacOS: freezing for about a minute on MacOS Mojave (10.14)

    Opening a system dialog on these systems can take extremely long.
    Workaround: start FreeCAD from a console or batch file.

    See https://forum.freecadweb.org/viewtopic.php?f=4&t=31343 for details.