[Pkg-tigervnc-devel] Bug#1103038: tigervnc-standalone-server: Hardware acceleration does not work (llvmpipe used)

[Leonard Lausen]

Package: tigervnc-standalone-server
Version: 1.14.1+dfsg-1
Severity: important
X-Debbugs-Cc: leonard at lausen.nl

Dear Maintainer,

as of TigerVNC 1.14, Xtigervnc now supports hardware acceleration.
Unfortunately sessions started via tigervnc-standalone-server fail to
use the hardware renderer, but fall back to llvmpipe software renderer.

To reproduce, run for example `tigervncserver -xstartup xfce4-session`
connect to the session and execute `glxinfo | grep "renderer string"` in
a terminal. It prints "OpenGL renderer string: llvmpipe (LLVM 19.1.7,
256 bits)". 

Running a Xfce4 session manually/without VNC on the same system in
contrast returns "OpenGL renderer string: Mesa Intel(R) Iris(R) Xe
Graphics (TGL GT2)".

-- System Information:
Debian Release: trixie/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 6.12.21-amd64 (SMP w/8 CPU threads; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.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 tigervnc-standalone-server depends on:
ii  libaudit1                   1:4.0.2-2+b2
ii  libc6                       2.41-6
ii  libfile-readbackwards-perl  1.06-2
ii  libgcrypt20                 1.11.0-7
ii  libgl1                      1.7.0-1+b2
ii  libgmp10                    2:6.3.0+dfsg-3
ii  libgnutls30t64              3.8.9-2
ii  libhogweed6t64              3.10.1-1
ii  libjpeg62-turbo             1:2.1.5-3.1
ii  libnettle8t64               3.10.1-1
ii  libpam0g                    1.7.0-3
ii  libpixman-1-0               0.44.0-3
ii  libselinux1                 3.8.1-1
ii  libstdc++6                  14.2.0-19
ii  libsystemd0                 257.5-2
ii  libunwind8                  1.8.1-0.1
ii  libxau6                     1:1.0.11-1
ii  libxdmcp6                   1:1.1.5-1
ii  libxfont2                   1:2.0.6-1+b3
ii  perl                        5.40.1-2
ii  tigervnc-common             1.14.1+dfsg-1
ii  x11-xkb-utils               7.7+9
ii  xauth                       1:1.1.2-1.1
ii  xkb-data                    2.42-1
ii  zlib1g                      1:1.3.dfsg+really1.3.1-1+b1

Versions of packages tigervnc-standalone-server recommends:
ii  libgl1-mesa-dri    25.0.3-1
ii  tigervnc-tools     1.14.1+dfsg-1
ii  x11-xserver-utils  7.7+11
ii  xfonts-base        1:1.0.5+nmu1

Versions of packages tigervnc-standalone-server suggests:
ii  openssl          3.5.0-1
ii  xfonts-100dpi    1:1.0.5
ii  xfonts-75dpi     1:1.0.5
ii  xfonts-scalable  1:1.0.3-1.3

-- no debconf information