So far, you've not listed an application from the MATE desktop as being affected by this issue, in fact you specifically state that Caja (the MATE file manager) work correctly.
I also have no way to reproduce this issue given your exotic hardware configuration :-(
So far, you've not listed an application from the MATE desktop as being affected by this issue, in fact you specifically state that Caja (the MATE file manager) work correctly.
I also have no way to reproduce this issue given your exotic hardware configuration :-(