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From: Michael Farmbauer &lt;michael.farmbauer@oth-regensburg.de&gt;
To: Debian Bug Tracking System &lt;submit@bugs.debian.org&gt;
Subject: prusa-slicer: Black plater/canvas,
 but the rest of the UI works normally
Message-ID: &lt;177813612606.79178.2401115385021290598.reportbug@spitn.lan&gt;
X-Mailer: reportbug 13.2.0
Date: Thu, 07 May 2026 08:42:06 +0200
Delivered-To: submit@bugs.debian.org

Package: prusa-slicer
Version: 2.9.4+dfsg-4+b1
Severity: important
X-Debbugs-Cc: michael.farmbauer@oth-regensburg.de

Dear Maintainer,

Since a recent update in Sid, the native prusa-slicer package fails to
initialize the 3D rendering canvas. The terminal output repeatedly
shows: &quot;Unable to init glew library: Missing GL version&quot;.

This appears to be a conflict between the current system GLEW/Mesa
libraries and how the PrusaSlicer binary handles OpenGL contexts on
Wayland.

Steps to reproduce:

* Run prusa-slicer on a GNOME Wayland session in Debian Sid.

* Observe the black plater area.

* Check terminal output for the GLEW error.

Additional Context:

* glxinfo -B confirms a functional OpenGL 4.6 context is available on
    the system.

* The Flathub version of PrusaSlicer works correctly on the same
    machine, ruling out hardware or kernel driver issues.

* Forcing GDK_BACKEND=x11 or LIBGL_ALWAYS_SOFTWARE=1 does not resolve
    the error for the native binary.


-- System Information:
Debian Release: forky/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 7.0.3+deb14-amd64 (SMP w/8 CPU threads; PREEMPT)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages prusa-slicer depends on:
ii  fonts-noto-cjk                   1:20240730+repack1-1
ii  fonts-noto-core                  20201225-5
ii  libboost-chrono1.90.0            1.90.0-6
ii  libboost-filesystem1.90.0        1.90.0-6
ii  libboost-log1.90.0               1.90.0-6
ii  libboost-nowide1.90.0            1.90.0-6
ii  libboost-thread1.90.0            1.90.0-6
ii  libc6                            2.42-16
ii  libcurl3t64-gnutls               8.20.0-1
ii  libdbus-1-3                      1.16.2-4
ii  libexpat1                        2.8.0-1
ii  libfontconfig1                   2.17.1-5
ii  libgcc-s1                        16-20260425-1
ii  libglew2.3                       2.3.1-6
ii  libglib2.0-0t64                  2.88.1-2
ii  libgmp10                         2:6.3.0+dfsg-5+b2
ii  libgtk-3-0t64                    3.24.52-1
ii  libimath-3-1-29t64               3.1.12-1+b5
ii  libjpeg62-turbo                  1:3.1.3-4
ii  libmpfr6                         4.2.2-3
ii  libnlopt0                        2.7.1-7.1+b2
ii  libocct-data-exchange-7.9        7.9.2+dfsg-4
ii  libocct-foundation-7.9           7.9.2+dfsg-4
ii  libocct-modeling-algorithms-7.9  7.9.2+dfsg-4
ii  libocct-modeling-data-7.9        7.9.2+dfsg-4
ii  libocct-ocaf-7.9                 7.9.2+dfsg-4
ii  libopengl0                       1.7.0-3+b1
ii  libopenvdb10.0t64                10.0.1-3.1
ii  libpango-1.0-0                   1.57.1-2
ii  libpng16-16t64                   1.6.58-1
ii  libqhull-r8.0                    2020.2-9
ii  libqhullcpp8.0                   2020.2-9
ii  libsoup-3.0-0                    3.6.6-1
ii  libssl3t64                       3.6.2-1
ii  libstdc++6                       16-20260425-1
ii  libtbb12                         2022.3.0-2
ii  libtbbmalloc2                    2022.3.0-2
ii  libwebkit2gtk-4.1-0              2.52.3-2
ii  libwxbase3.2-1t64                3.2.9+dfsg-1+b1
ii  libwxgtk-gl3.2-1t64              3.2.9+dfsg-1+b1
ii  libwxgtk-webview3.2-1t64         3.2.9+dfsg-1+b1
ii  libwxgtk3.2-1t64                 3.2.9+dfsg-1+b1
ii  libz3-4                          4.13.3-1+b2
ii  zlib1g                           1:1.3.dfsg+really1.3.2-3

prusa-slicer recommends no packages.

prusa-slicer suggests no packages.

-- no debconf information
]