(In reply to Darkspirit from comment #52) > I assume this bug will be fixed once video decoding has been moved to a > utility process (bug 1722051). > Until then, MOZ_DISABLE_RDD_SANDBOX=1 environment variable is required to try > out experimental VAAPI.
It doesn't work reliably regardless, as also some other reports here indicate: intel_gpu_top shows that hardware decoding initially is used for a brief moment, but then Firefox falls back to CPU decoding with intel_gpu_top reporting 0% hardware video decoding load. For whatever weird reason, it very rarely can continue to show hardware decoding load, but then breaks upon next Firefox launch too. VAAPI is completely unusable since Firefox 99 with at least Intel, also with MOZ_DISABLE_RDD_SANDBOX=1. Reports that claim it to be working without making sure it really does so via intel_gpu_top over an extended period of usage (i.e. days) are unfortunately not reliable. I think I'll just go back to 98 and perhaps set up some 3rd party sandboxing in case there are open CVEs. Hardware decoding is not a bonus on slow CPUs, it's a must. Really annoying that, despite of still being experimental, it has been broken so hard. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/1964547 Title: [upstream] RDD sandbox prevents HW-accelerated video playback Status in Mozilla Firefox: Confirmed Status in firefox package in Ubuntu: Confirmed Bug description: • Ubuntu 21.10 (64 bit) • Firefox 98 installed via apt (cookies & cache have been cleared) • Kernel 5.13.0-30-generic x86_64 • Tried on both wayland and X11 session → same result Steps to reproduce: (1) Visit https://www.youtube.com (2) Choose one of the video Actual Result: Video doesn't play What Expected: Video Play normally Previously it was normal on Firefox 97 (apt version) Tried installing Firefox 98 Snap version and it works normally To manage notifications about this bug go to: https://bugs.launchpad.net/firefox/+bug/1964547/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
