Restarting EXX calculations with increased nqx1,nqx2,nqx3
"Some expensive calculations with hybrid functionals like HSE can be accelerated using downsampling, i.e., setting nqx1, nqx2,nqx3 to be divisors of the kpoints grid dimensions, at the cost of decreasing quality. In some cases, I would like to split the calculation by means of subsequent calculations with increasing nqx1, nqx2,nqx3. For large nqx1, nqx2,nqx3, I would like to start the calculation from the wavefunctions obtained with smaller nqx1, nqx2,nqx3 (startingwfc ='file'). However, PWSCF always begins doing a GGA calculation, then it goes to hybrid, writting a message "EXX: now go back to refine exchange calculation". In this process, one loses the wfn read from file. Is it possible to disable the initial GGA calculation with some keyword?" (Eduardo Menendez)