I’m running into a HW video acc. issues on my backup mobile-Haswell notebook, after having updated it recently since some time.
Vivaldi no longer uses (intel_gpu_top) the Video engine and CPU utilization is much higher on video playback.
Yet Vivaldi://gpu shows HW acceleration is enabled and video decoding is HW accelerated. Using these flags:
--use-gl=angle(usingeglit falls back to software rendering)
--ignore-gpu-blocklist
--enable-features=VaapiVideoEncoder,VaapiVideoDecoder,CanvasOopRasterization
--disable-features=UseChromeOSDirectVideoDecoder,UseSkiaRenderer
--disable-gpu-driver-workarounds
My media box however uses a Skylake-T and it had no issues. Bar from some extra flags it needed, after updating it recently, to get HW video acc. working again with flags: --use-vulkan --use-gl=egl --webgpu --enable-raw-draw.
Without the vulkan flag HW video acc. would also fall back to software rendering.
FireFox how ever does properly utilize the Haswell’s igpu Video engine on video playback and it’s also not loading the CPU keeping it at idle frequencies.
So what has changed in Chromium that HW video acc. no longer properly works on Haswell, yet does on later igpu’s? Vulkan support?