Subject: Re: bug#79007: [PATCH core-updates] gnu: mesa: Re-enable X11 protocol support for the DRI2 extension.
From: John Kehayias <[email-masked]>
To: Philipp Berger <[email-masked]>
Cc: [email-masked]
Date: Sun, 27 Jul 2025 15:43:14 +0000
List-Id: <debbugs-submit.debbugs.gnu.org>

Hello

On Sun, Jul 13, 2025 at 06:06 AM, Philipp Berger wrote:

> Starting with Mesa 24.3, X11 protocol support for the DRI2 extension is
> no longer enabled by default.  The developers are phasing it out in
> favor of DRI3, and have moved it into an optional 'legacy-x11' feature.
> Re-enable it to retain hardware acceleration on older systems that do
> not support DRI3.
>

Thanks! Applied on mesa-updates branch, currently
830bc815f2b9f91f0b335a8c47c9682c545b601b though future rebases will
change that.

> * gnu/packages/gl.el (mesa)[arguments]<#:configure-flags>: Add
> '-Dlegacy-x11=dri2'.
> ---
>  gnu/packages/gl.scm | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/gnu/packages/gl.scm b/gnu/packages/gl.scm
> index a23426fd42..b5be8346b9 100644
> --- a/gnu/packages/gl.scm
> +++ b/gnu/packages/gl.scm
> @@ -428,6 +428,9 @@ (define-public mesa
>           ;; Also enable the tests.
>           "-Dbuild-tests=true"
>
> +         ;; Re-enable X11 protocol support for the DRI2 extension.
> +         "-Dlegacy-x11=dri2"
> +
>           "-Dllvm=enabled")              ; default is x86/x86_64 only
>
>         ;; XXX: 'debugoptimized' causes LTO link failures on some drivers.  The
>
> base-commit: d31a92c6242145724783b692941545384fd71bc4

Closing.

John