The most common cause is a date-parsing bug inherent to Xilinx software written before 2022.
Ensure your Linux or Windows version is officially supported. Vivado 2020.2 supports Ubuntu 16.04, 18.04, and 20.04, as well as RHEL/CentOS 7 and 8.
According to AMD Adaptive Support , the update addressed several internal tool inconsistencies. While the specific list of bugs is extensive, they typically cover:
The cumulative (specifically patch 76152 ) is not just a minor revision—it is a critical collection of fixes and packages that directly addresses many of the stability problems and bugs present in the original 2020.2 release. This update should be your first step if you are installing 2020.2 for production work. xilinx vivado 20202 fixed
Launch times can be sluggish, often traced back to FlexLM license verification or floating license search paths that are not currently active. Known Stability Issues
Which were you seeing (Y2K22, missing libs, or crash)?
Community feedback for 2020.2 is mixed. While it fixed many 2020.1 bugs, some users reported timing closure regressions for complex UltraScale+ designs (like 100G Corundum) compared to 2020.1. AMD/Xilinx addressed many of these in subsequent updates like and 2020.2.2 . The most common cause is a date-parsing bug
The most crucial piece of information for any user of version 2020.2 is that this major update is the final stable release. AMD has released Update 2 (2020.2.2) , and installing it is arguably the single most effective "fix" for the vast majority of issues in this version.
The standout feature of the 2020.2 release is its integration with AMD Vitis , allowing developers to move between traditional FPGA design and software-accelerated flows more fluidly.
If flattening to "none" degrades your design's overall Quality of Results (QoR), apply the DONT_TOUCH or KEEP_HIERARCHY attribute in your HDL source code directly onto the failing submodule to isolate it from cross-boundary optimizations. Mitigate BRAM Inference Failures According to AMD Adaptive Support , the update
Vivado 2020.2 was a major stepping stone for Versal devices, offering automatic place-and-route of Super Logic Region (SLR) crossings and improved visualization for Dynamic Function eXchange (DFX) floorplans.
cd /2020.2/data/xicom/cable_drivers/lin64/install_script/install_drivers/ sudo ./install_drivers Use code with caution.
source /path/to/ar76034_vivado_2020.2.tcl patch_vivado
sudo apt install libncurses5 libtinfo5 libc6-dev-i386 lib32z1
The EDIF parser in 2020.1 was case-sensitive incorrectly. 2020.2 fixes this.