Cannot Enable Low Power Encoding for Synology 423+(J4125)

[initzhang]

Do you have HDR content?  My understanding is that low power encoding only really comes into play when tone mapping HDR to SDR.

But to answer your question, I re-read your post and re-read the low power encoding guide.

Step 2 states you need to put this in /etc/modprobe.d/

Code:

sudo mkdir -p /etc/modprobe.d
sudo sh -c "echo 'options i915 enable_guc=2' >> /etc/modprobe.d/i915.conf"

Yours only has "i815 enable_guc=2" without options at the beginning.

Hi, thanks for the reply. Yes I do have a lot HDR and DoVi contents.
Depending on the linux kernel version (pre or after 4.15 according to https://cdrdv2-public.intel.com/609249/6...v1-1-1.pdf) and distro, all possible options are:

• i915.enable_guc=2
  
• i915.enable_guc_loading=1 i915.enable_guc_submission=1
  
• options i915 enable_guc_loading=1 enable_guc_submission=1
  
• options i915 enable_guc=2
  

Unfortunately none of these four works.
I have also updated the main thread, the root cause seems to be a patch regarding the 4.4 kernel of DSM 7.2.