Vivado 2020.2 was designed before the release of Windows 11. When running synthesis, implementation, or behavioral simulations on Windows 11, the processes frequently freeze at 0% or hang indefinitely without utilizing CPU resources. To fix OS scheduling and thread management conflicts:
Many users reported that the Vivado Simulator (xsim) crashes during long simulations or when dealing with complex RTL designs. Internal memory leaks in xsim .
Before applying fixes, you must identify your specific issue. Below are the top five failures reported in 2020.2.
Navigate to your Vivado installation directory: Xilinx/Vivado/2020.2/lib/lnx64.o/ . Locate the file named libfreetype.so.6 . xilinx vivado 20202 fixed
| Issue Category | Description | Solution | | :--- | :--- | :--- | | | Critical mismatch bug causing functional errors in synthesized logic. | Fix included in 2020.2.2 | | IP Generation | Failure to include specific LUTRAM ROMs in designs. | Fix included in 2020.2 or via IP re-generation | | Installation | Web installer saying “Obsolete” for 2020.2. | Use Full Installer (SFD) not the web installer | | Project Hang | Stuck at "Translating synthesized netlist" due to .ngc file. | Remove any .ngc files in the design and replace with .edf | | hw_server | Labtools 27-2223 connection error to target hardware. | Run the 64-bit hw_server executable as administrator | | Non-Project Mode | Export of encrypted netlists fails ("Design is empty"). | Upgrade to 2020.2.2 or downgrade to 2020.1 | | Migration (ISE to Vivado) | IP cores “forgotten” after first synthesis, leading to black-box errors. | Clean project files and ensure absolute paths for all source files | | SMPTE UHD-SDI RX | Version 2.0 (Rev. 6) has issues with Board Version errors. | Apply the patch described in Xilinx Answer 75932 |
2020.2 Vivado IP Release Notes - All IP Change Log Information
wget http://archive.ubuntu.com/ubuntu/pool/main/libp/libpng/libpng12-0_1.2.54-1ubuntu1_amd64.deb sudo dpkg -i libpng12-0_1.2.54-1ubuntu1_amd64.deb Vivado 2020
with sudo if you're hitting permission walls. Time to get back to the bitstreams! 💻✨ To help you get the most out of this, let me know: Are you on Windows or Linux ?
tar -xzf Xilinx_Unified_2020.2.2_1218_1237.tar.gz cd Xilinx_Unified_2020.2.2_1218_1237 sudo ./xsetup
The EDIF parser in 2020.1 was case-sensitive incorrectly. 2020.2 fixes this. Internal memory leaks in xsim
The launcher script now forces a specific QT style ( -style fusion ) and disables hardware acceleration for the GUI only (not for implementation). The difference is night and day—menus render instantly.
Have a fix we missed? Contribute to the community by commenting below or submitting a pull request to the Xilinx Reddit wiki.
[GUI Hang] Project Open -> Loading IP Catalog... -> Infinite Loop (10+ mins) The Tactical Patch Fix
Vivado's synthesis engine occasionally encounters fatal application errors when trying to optimize logic across hierarchical boundaries.
Many developers attempting to deploy a fresh node of Vivado 2020.2 encounter an installer failure stating that the web client is deprecated and cannot pull packages.