NVIDIA 470.63.01 driver randomly hangs with no video output when resuming from suspend using the /proc interface on GeForce GTX 960

Good new:
My sysadmin just fixed the issue on my DELL laptop ( with Kepler Quadro K2100M ) by switching on the intel card in the BIOS and deleting “acpi_osi=Linux” in grub → GRUB_CMDLINE_LINUX_DEFAULT=“” ( not sure whether both were required ).