iris/i965: possible regression in 20.0.5 due to changes in buffer manager sharing across screens (firefox/mozilla#1634213)
Firefox recently introduced dmabuf support in wayland for WebGL applications, greatly improving performance.
mesa>=20.0.5, the WebGL context is lost when using that feature, both with the iris and i965 drivers.
Regression testing identified the following commits in mesa that introduced this behavior:
OS: Linux 5.6.7-arch1-1 Window Protocol: wayland Desktop Environment: gnome GPU: Mesa Intel(R) HD Graphics 630 (KBL GT2) Driver Vendor: mesa/iris or mesa/i965 Driver Version: 01bd0481 -> 20.0.5 -> current master (last tested with f8424d3b)