[Development] Enabling xcb-native-painting feature in CI

[Lars Knoll]

We re-added back for a specific large customer at that time, who was using Qt/X11 over low bandwidth connections and where the image based painting was not performing well enough.

It's a long time ago, so I don't quite remember who the customer was. But I doubt that they still have the same problem today, so I would also go for removing it.

Cheers,
Lars

> On 27 Oct 2025, at 09:56, Eirik Aavitsland via Development <development at qt-project.org> wrote:
> 
> 
> +1 for removing it. It was only added in Qt 5 on Lars’ request to solve some very specific usecase that nobody remembers anymore. It has no future.
> 
> - Eirik Aa.
> 
> 
> Confidential
> From: Development <development-bounces at qt-project.org> on behalf of Thiago Macieira <thiago.macieira at intel.com>
> Date: Saturday, 25 October 2025 at 18:42
> To: development at qt-project.org <development at qt-project.org>
> Subject: Re: [Development] Enabling xcb-native-painting feature in CI
> 
> On Saturday, 25 October 2025 08:59:40 Pacific Daylight Time Albert Astals Cid
> wrote:
> > Removing it was going to be my initial suggestion, but after speaking to the
> > opensuse packagers it seems there is some use for it
> >
> > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugzilla.opensuse.org%2Fshow_bug.cgi%3Fid%3D1214915&data=05%7C02%7C%7C8fb6825610764d67cd8e08de13e58746%7C20d0b167794d448a9d01aaeccc1124ac%7C0%7C0%7C638970073737388485%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=c67q4ycfU6Qc83H2589NUUl6QYMzQ%2Fnk%2BBAgwevn12k%3D&reserved=0 <https://bugzilla.opensuse.org/show_bug.cgi?id=1214915>
> >
> > Yes, i know the bug mentions qt5 but i would assume it potentially applies
> > for qt6 too.
> 
> The problem is that it's dangerous, as it seems no one is building this and
> testing it. The only changes to it since it was revived in 2017 appear to be
> build and issue fixes. I suppose that if anyone reported issues with it in
> JIRA, we wouldn't be able to fix and would close the bug report as "you've used
> an experimental feature, you accepted the risk"
> 
> --
> Thiago Macieira - thiago.macieira (AT) intel.com
>   Principal Engineer - Intel Data Center Group
> -- 
> Development mailing list
> Development at qt-project.org
> https://lists.qt-project.org/listinfo/development

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