I get the same error on Ubuntu 20.04.3. The problem here is likely caused by Mesa drivers update to 21.2.6. Looks like Mesa 21 has changes in Wayland authentication and it requires fix to libva (https://github.com/intel/libva/pull/476). The fix should be present in libva 2.11 and above while Ubuntu 20.04.3 ships libva 2.6.
I verified it using compiled libva/libva-utils from current upstream git. with current upstream bor@bor-Latitude-E5450:~/src/intel/libva-utils$ ./vainfo/vainfo libva info: VA-API version 1.15.0 libva info: Trying to open /home/bor/pkg/lib/dri/iHD_drv_video.so libva info: va_openDriver() returns -1 libva info: Trying to open /home/bor/pkg/lib/dri/i965_drv_video.so libva info: Found init function __vaDriverInit_1_6 libva info: va_openDriver() returns 0 vainfo: VA-API version: 1.15 (libva 2.15.0.pre1) vainfo: Driver version: Intel i965 driver for Intel(R) Broadwell - 2.4.0 vainfo: Supported profile and entrypoints VAProfileMPEG2Simple : VAEntrypointVLD VAProfileMPEG2Simple : VAEntrypointEncSlice VAProfileMPEG2Main : VAEntrypointVLD VAProfileMPEG2Main : VAEntrypointEncSlice VAProfileH264ConstrainedBaseline: VAEntrypointVLD VAProfileH264ConstrainedBaseline: VAEntrypointEncSlice VAProfileH264Main : VAEntrypointVLD VAProfileH264Main : VAEntrypointEncSlice VAProfileH264High : VAEntrypointVLD VAProfileH264High : VAEntrypointEncSlice VAProfileH264MultiviewHigh : VAEntrypointVLD VAProfileH264MultiviewHigh : VAEntrypointEncSlice VAProfileH264StereoHigh : VAEntrypointVLD VAProfileH264StereoHigh : VAEntrypointEncSlice VAProfileVC1Simple : VAEntrypointVLD VAProfileVC1Main : VAEntrypointVLD VAProfileVC1Advanced : VAEntrypointVLD VAProfileNone : VAEntrypointVideoProc VAProfileJPEGBaseline : VAEntrypointVLD VAProfileVP8Version0_3 : VAEntrypointVLD bor@bor-Latitude-E5450:~/src/intel/libva-utils$ With *only* commit 283f776a9649dcef58b47958c1269499adfa1cd4 reverted bor@bor-Latitude-E5450:~/src/intel/libva-utils$ ./vainfo/vainfo wl_drm@7: error 0: authenticate failed VA error: wayland: Wayland roundtrip error: Protocol error (errno 71) libva info: VA-API version 1.15.0 libva error: vaGetDriverNameByIndex() failed with invalid VADisplay, driver_name = (null) vaInitialize failed with error code 3 (invalid VADisplay),exit bor@bor-Latitude-E5450:~/src/intel/libva-utils$ Please update libva/vainfo in 20.04.3 to match Mesa. I can open new bug for 20.04 if needed. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1944088 Title: [vaapi] libva: vaGetDriverNameByIndex() failed with invalid VADisplay, driver_name = (null) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mpv/+bug/1944088/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs