Issue with i915 PSR module option

[l0f4r0@tuta.io]

Hi,

I'm on Buster.
Could somebody explain me please why my i915 PSR option doesn't seem to be taken into account after reboot (still -1 instead of 0):

$ sudo modinfo i915 | grep -i psr
parm:           enable_psr:Enable PSR (0=disabled, 1=enabled) Default: -1 (use per-chip default) (int)

$ ls -l /etc/modprobe.d/i915.conf
-rw-r--r-- 1 root root 26 mars  28 17:09 /etc/modprobe.d/i915.conf

$ sudo cat /etc/modprobe.d/i915.conf
options i915 enable_psr=0

$ sudo cat /sys/module/i915/parameters/enable_psr
-1

Thank you in advance :)
l0f4r0