Slow performance when hardware encoder enabled

[Kieaer]

Description

Using the software encoder, instead of increasing the cpu temperature, the fps is relatively stable at 30 to 50 fps. Using the hardware encoder, the cpu clock drops below 800MHz, and the GPU usage also drops to fps 4 ~ 9 without exceeding 30%.

Using 5900HX, Embedded GPU and has 1.3GHz ~ 4.3GHz clock. When I run the game without ALVR, the fps works between 30 ~ 60 fps.

Hardware encoding keeps the cpu fan speed down as it doesn't generate heat. No heat is nice, but the CPU clock drops below 1GHz and performance is greatly reduced.

Hardware encoder

Software encoder

General Troubleshooting

• [x] I carefully followed the instructions in the README and successfully completed the setup wizard
• [x] I read the ALVR Wikis here and here

Environment

Hardware

https://linux-hardware.org/?probe=d1da7498da

Installation

ALVR Version: v20.0.0-dev07+nightly.2023.3.15

SteamVR Version: 1.25.7

Install Type:

• [ ] Packaged (exe, deb, rpm, etc)
• [ ] Portable (zip)
• [x] Source

OS Name and Version : Ubuntu 22.04.1 LTS

[Vixea]

are you changing the power profile to vr this is going to be needed until kernel version 6.4 it seems at this point?

[Kieaer]

I'm not change power profile. Linux 5.15 LTS is applied to this ubuntu version. Do I need a kernel upgrade?

[Vixea]

no you need to change the power profile

[Vixea]

oh about the previous issue that I closed before use this one https://github.com/alvr-org/ALVR-nightly/releases/tag/v20.0.0-dev07%2Bnightly.2023.03.25 as the latest has a regression that effects linux

[Kieaer]

no you need to change the power profile

AMD CPU has no way to change the power profile.

[Vixea]

https://github.com/ValveSoftware/SteamVR-for-Linux/issues/469 read this

[Kieaer]

I tried but hardware encoders are still very unstable fps than software encoders. I'll try again with the nightly version.

Edit: same problem

[Vixea]

well at this case its your gpu not being powerful enough