Fwd: [Qt bugreports] Updates for QTBUG-135786: WebEngine in 6.9.0 with an AMD GPU and on both Wayland/X11 renders gltiches instead of text

[Dieter Nützel]

Mesa Ticket for radeonsi / ACO is, here:

https://gitlab.freedesktop.org/mesa/mesa/-/issues/13026



Am 22.04.2025 04:51, schrieb Dieter Nützel:
> Hello radeonsi / RADV ACO fellows,
> 
> found the solution for the below Qt 6.9.0 (maybe former) AMD  radeonsi 
> (Vulkan/RADV) rendering issue.
> 
> ACO is the culprit (for radeonsi at least).
> 
> 
> AMD_DEBUG=usellvm SOLVED it on my side.
> 
> Have to open a Ticket on gitlab.
> 
> Greetings,
> Dieter
> 
> -------- Originalnachricht --------
> Betreff: [Qt bugreports] Updates for QTBUG-135786: WebEngine in 6.9.0 
> with an AMD GPU and on both Wayland/X11 renders gltiches instead of 
> text
> Datum: 22.04.2025 04:24
> Von: Dieter Nützel (via JIRA) <jira-noreply at qt-project.org>
> An: dieter at nuetzel-hh.de
> 
> 
> 
>  		There are 3 comments.
> 
>  		 Qt [1]
>  		 /
> 
>  		 QTBUG-135786 [2]
>  		 Reported
> 
> WEBENGINE IN 6.9.0 WITH AN AMD GPU AND ON BOTH WAYLAND/X11 RENDERS
> GLTICHES INSTEAD OF TEXT
> 
>  		 View issue [2]   ·   Add comment [3]
> 
>  3 COMMENTS
> 
>  		 Dieter Nützel on 22 Apr '25 04:12
> 
>  (For me) It is an
> 
> Mesa git radeonsi (amdgpu) ACO driver bug.
> 
> When I disable ACO (AMD_DEBUG=usellvm)
> 
> Issue is SOLVED.
> 
> OpenGL vendor string: AMD
> OpenGL renderer string: AMD Radeon RX 580 Series (radeonsi, polaris10,
> *LLVM* 21.0.0, DRM 3.61, 6.14.3
> -2.g493ad77-default)
> OpenGL core profile version string: 4.6 (Core Profile) Mesa 
> 25.2.0-devel
> (git-c643f62633)
> 
>  BAD
> 
> OpenGL vendor string: AMD
> OpenGL renderer string: AMD Radeon RX 580 Series (radeonsi, polaris10,
> {*} ACO {*} , DRM 3.61, 6.14.3-2.g493a
> d77-default)
> OpenGL core profile version string: 4.6 (Core Profile) Mesa 
> 25.2.0-devel
> (git-c643f62633)
> 
> Reporting upstream (Mesa Devel)
> 
>  		 Dieter Nützel on 22 Apr '25 04:13
> 
>  (For me) It is an
> 
>  * Mesa git radeonsi * (amdgpu) * ACO * driver {*} bug {*} .
> 
> When I disable * ACO * ( {*} AMD_DEBUG=usellvm {*} )
> 
> Issue is {*} SOLVED {*} .
> 
> OpenGL vendor string: AMD
> OpenGL renderer string: AMD Radeon RX 580 Series (radeonsi, polaris10,
> *LLVM* 21.0.0, DRM 3.61, 6.14.3
> -2.g493ad77-default)
> OpenGL core profile version string: 4.6 (Core Profile) Mesa 
> 25.2.0-devel
> (git-c643f62633)
> 
> BAD
> 
> OpenGL vendor string: AMD
> OpenGL renderer string: AMD Radeon RX 580 Series (radeonsi, polaris10,
> {*}ACO{*}, DRM 3.61, 6.14.3-2.g493a
> d77-default)
> OpenGL core profile version string: 4.6 (Core Profile) Mesa 
> 25.2.0-devel
> (git-c643f62633)
> 
> Reporting upstream (Mesa Devel)
> 
>  		 Dieter Nützel on 22 Apr '25 04:13
> 
>  (For me) It is an
> 
> *Mesa git radeonsi* (amdgpu) *ACO* driver {*}bug{*}.
> 
> When I disable *ACO* ({*}AMD_DEBUG=usellvm{*})
> 
> Issue is {*}SOLVED{*}.
> 
> OpenGL vendor string: AMD
> OpenGL renderer string: AMD Radeon RX 580 Series (radeonsi, polaris10,
> *LLVM* 21.0.0, DRM 3.61, 6.14.3
> -2.g493ad77-default)
> OpenGL core profile version string: 4.6 (Core Profile) Mesa 
> 25.2.0-devel
> (git-c643f62633)
> 
>  * BAD *
> 
> OpenGL vendor string: AMD
> OpenGL renderer string: AMD Radeon RX 580 Series (radeonsi, polaris10,
> {*}ACO{*}, DRM 3.61, 6.14.3-2.g493a
> d77-default)
> OpenGL core profile version string: 4.6 (Core Profile) Mesa 
> 25.2.0-devel
> (git-c643f62633)
> 
> Reporting upstream (Mesa Devel)
> 
>  		 This message was sent by Atlassian Jira
> (v9.4.30#940030-sha1:ee1f74a)
> 
>  If image attachments aren't displayed, see this article [4].
> 
> 
> 
> Links:
> ------
> [1] https://bugreports.qt.io/browse/QTBUG
> [2] https://bugreports.qt.io/browse/QTBUG-135786
> [3] https://bugreports.qt.io/browse/QTBUG-135786#add-comment
> [4] 
> https://confluence.atlassian.com/display/JIRAKB/Image+attachments+are+not+displayed+in+emails