abrosich@xxxxxxxx writes: > I've changed the environment. > The linux client now is a Debian machine with testing flavour to have the latest > versions of the involved softwares. These are the versions of some of them: > > Kernel: #1 SMP Debian 5.4.19-1 (2020-02-13) > cifs.upcall: version: 6.9 > keyutils: keyctl from keyutils-1.6.1 (Built 2020-02-10) > sssd: 2.2.3 > cifs module: 2.23 I'd guess the following commit would fix your issue: 5739375ee423 ("cifs: Fix mount options set in automount") but could you please try it with 5.6-rc4? Provide full dmesg logs as well.