|Gromacs| 2020.7 release notes
------------------------------

This version was released on February 3rd, 2022. These release notes
document the changes that have taken place in |Gromacs| since the
previous 2020.6 version, to fix known issues.

.. Note to developers!
   Please use """"""" to underline the individual entries for fixed issues in the subfolders,
   otherwise the formatting on the webpage is messed up.
   Also, please use the syntax :issue:`number` to reference issues on redmine, without the
   a space between the colon and number!

Fixes where mdrun could behave incorrectly
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Fixed bug with GPU LINCS occasionally shifting atoms in wrong direction
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""

Due to missing blocking synchronizations in the CUDA version of LINCS,
the shared memory was occasionally overwritten with the new data. This
may slightly affect the final coordinates of the shifted atoms.

:issue:`4199`

Fix calculation of restraint potential for large restraint deviations
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""

The calculation in the code did not follow the description of the potential in the manual
but the potential continued to grow quadratically instead of linearly as it should.

:issue:`4346`

Fixes for ``gmx`` tools
^^^^^^^^^^^^^^^^^^^^^^^

Fixes that affect portability
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Miscellaneous
^^^^^^^^^^^^^