My apologies, Li, I didn't realize that Snapcraft 7.1.1 had to reach the builder, not the installer machine; as such, your test still suffered the lack of LIBVA_DRIVERS_PATH.
I uploaded a rebuilt snap (from hwacc-debug, with vainfo) to candidate/hwacc and made sure that the snapcraft changes made their way in. May you please install — or refresh — it and try it again?
My apologies, Li, I didn't realize that Snapcraft 7.1.1 had to reach the builder, not the installer machine; as such, your test still suffered the lack of LIBVA_DRIVERS_PATH.
I uploaded a rebuilt snap (from hwacc-debug, with vainfo) to candidate/hwacc and made sure that the snapcraft changes made their way in. May you please install — or refresh — it and try it again?