Bug#994057:
Hi,
On Fri, Sep 17, 2021 at 02:15:50PM +0200, Sylvain Tgz wrote:
> Hello,
>
> Thank you for your reply.
> I didn't know graphic rendering specificities of firefox. Thank you
> for the information.
>
> I opened the bug on libegl-mesa0 because it was the first packet of
> dependencies list.
> I using 21.2.1-2 version to try to provide more information for this bug.
>
> To reproduce the issue with firefox :
> - right click on tab and use mouse to fly over tab menu.
> or
> - open a web site and browse it down/up
>
> On my setup, Firefox seems using basic (software rendering) mode by default.
> With this basic mode, the issue is present with right click tab and
> web site browsing
>
> I tried to use firefox with Webrender (MOZ_WEBRENDER=1 firefox),
> right click artifacts are still present, but web browsing doesn't
> display artifact.
>
> When using EGL by MOZ_X11_EGL=1 firefox not working, Basic mode is still used
>
> Current mode is checked by about:support and
> Graphics/Features/Compositing value.
>
> I tried to provide a capture of the issue by using screen video
> recorder "simplescreenrecorder" and when I play the video I cannot see
> artifact on the video.
> When using remote desktop by VNC, artifact are not present.
>
> This bug couldn't be related between libraries and hardware ?
>
> I found newer application with artifact : VLC, simplescreenrecorder
FWIW, I can reproduce the same behaviour with a system with the
following:
00:02.0 VGA compatible controller [0300]: Intel Corporation UHD Graphics 620 [8086:5917] (rev 07) (prog-if 00 [VGA controller])
after upgrading mesa packages from 20.3.5-1 to the current one in
unstable, 21.2.1-2. I could not test the intermediate experimental
uploaded packages to more ping pointing the issue.
That said, the behaviour seems not reproducible on each system, for
instance it does not show up (for me) on a system with
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
Regards,
Salvatore
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