1589245 - entire window is mirrored vertically with gfx.webrender.enabled=true on arm64 wayland libmali

Status: RESOLVED INACTIVE

(Core :: Graphics: WebRender, defect, P3)

Description

[adam]

Attachment: upside-down.png

User Agent: Mozilla/5.0 (X11; Linux aarch64; rv:70.0) Gecko/20100101 Firefox/70.0

Steps to reproduce:

Run firefox-70 on arm64 with a Mali 864 GPU and libMali.so EGL driver.

Note that except for the upside-downness, it looks like everything is working (!) So this might be the only issue left blocking webrender on arm64, where GPU acceleration is needed quite badly due to generally-less-powerful CPUs.

Actual results:

Everything is upside down (see screenshot)

Expected results:

Everything should be right-side up.

Comment 1

[adam]

Attachment: about:support (after enabling gfx.webrender.enabled but BEFORE restarting)

Comment 2

[adam]

To clarify: this is under wayland, not X11.

Comment 3

[BugBot [:suhaib / :marco/ :calixte]]

Bugbug thinks this bug should belong to this component, but please revert this change in case of error.

Comment 4

[russianneuromancer]

libMali.so EGL driver

I wonder which board and driver version do you use?

Comment 5

[adam]

The driver is libMali.so, as mentioned earlier.

The board is a samsung gru-kevin.

Comment 6

[Robert Mader [:rmader]]

Adam, does this still happen?

It looks like the texture does not get y-inverted. Are other DEs affected as well, e.g. Gnome-Shell?

Comment 7

[Robert Mader [:rmader]]

Closing this for inactivity and because there are enough reports about Wayland/WR working on ARM64.