It works well on before upgrade kernel: 4.19.0-6-amd64 I'm using the following parameters: GRUB_CMDLINE_LINUX_DEFAULT="quiet acpi_rev_override=1 i915.enable_fbc=1 i915.disable_power_well=0 i915.enable_psr=1 iwlwifi.power_save=1"
I have dell xps 9560 with bumblebee and nvidia properitary drivers configured in the according to debian wiki.
