https://bugs.kde.org/show_bug.cgi?id=487860
Bug ID: 487860
Summary: Nested kwin_wayland 6.0.90.1's window didn't appear in
VMs using the llvmpipe driver
Classification: Plasma
Product: kwin
Version: git-stable-Plasma/6.1
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Keywords: qt6
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: matt.fagn...@bell.net
Target Milestone: ---
SUMMARY
I booted the Fedora Rawhide/41 KDE Plasma live image
Fedora-KDE-Live-x86_64-Rawhide-20240531.n.0.iso in a QEMU/KVM VM using GNOME
Boxes with 3D acceleration disabled using the llvmpipe driver from mesa 24.1.0.
Plasma 6.0.90 on Wayland started. I started Konsole. I tried to run a nested
kwin_wayland session using the instructions at
https://community.kde.org/KWin/Wayland
export $(dbus-launch)
kwin_wayland --xwayland
The nested kwin_wayland window didn't appear, but it didn't crash. Just a task
manager Wayland icon labelled KDE Wayland compositor WL-0 was shown which
didn't show the window when I tried to click on it or maximize it. The
following output was in Konsole which showed KMS: DRM_IOCTL_MODE_CREATE_DUMB
failed: Permission denied errors among others including kwin_wayland_backend:
Could not find a suitable render format.
export $(dbus-launch)
kwin_wayland --xwayland
No backend specified, automatically choosing Wayland because WAYLAND_DISPLAY is
set
unable to lock lockfile /run/user/1000/wayland-0.lock, maybe another compositor
is running
Accepting client connections on sockets: QList("wayland-1")
OpenGL vendor string: Mesa
OpenGL renderer string: llvmpipe (LLVM 18.1.6, 256 bits)
OpenGL version string: 4.5 (Core Profile) Mesa 24.1.0
OpenGL shading language version string: 4.50
Driver: LLVMpipe
GPU class: Unknown
OpenGL version: 4.5
GLSL version: 4.50
Mesa version: 24.1
Requires strict binding: no
Virtual Machine: no
OpenGL vendor string: Mesa
OpenGL renderer string: llvmpipe (LLVM 18.1.6, 256 bits)
OpenGL version string: 4.5 (Core Profile) Mesa 24.1.0
OpenGL shading language version string: 4.50
Driver: LLVMpipe
GPU class: Unknown
OpenGL version: 4.5
GLSL version: 4.50
Mesa version: 24.1
Requires strict binding: no
Virtual Machine: no
KMS: DRM_IOCTL_MODE_CREATE_DUMB failed: Permission denied
KMS: DRM_IOCTL_MODE_CREATE_DUMB failed: Permission denied
KMS: DRM_IOCTL_MODE_CREATE_DUMB failed: Permission denied
KMS: DRM_IOCTL_MODE_CREATE_DUMB failed: Permission denied
KMS: DRM_IOCTL_MODE_CREATE_DUMB failed: Permission denied
KMS: DRM_IOCTL_MODE_CREATE_DUMB failed: Permission denied
kwin_wayland_backend: Could not find a suitable render format
libEGL warning: egl: failed to create dri2 screen
Refusing to try glamor on llvmpipe
EGL setup failed, disabling glamor
Failed to initialize glamor, falling back to sw
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning: Unsupported maximum keycode 708, clipping.
> X11 cannot support keycodes above 255.
> Warning: Could not resolve keysym XF86KbdInputAssistPrevgrou
> Warning: Could not resolve keysym XF86KbdInputAssistNextgrou
Errors from xkbcomp are not fatal to the X server
MESA: error: ZINK: failed to choose pdev
libEGL warning: egl: failed to create dri2 screen
QSoundEffect(pulseaudio): Error decoding source
file:///usr/share/maliit/keyboard2/sounds/key_tick2_quiet.wav
KMS: DRM_IOCTL_MODE_CREATE_DUMB failed: Permission denied
KMS: DRM_IOCTL_MODE_CREATE_DUMB failed: Permission denied
KMS: DRM_IOCTL_MODE_CREATE_DUMB failed: Permission denied
KMS: DRM_IOCTL_MODE_CREATE_DUMB failed: Permission denied
KMS: DRM_IOCTL_MODE_CREATE_DUMB failed: Permission denied
KMS: DRM_IOCTL_MODE_CREATE_DUMB failed: Permission denied
KMS: DRM_IOCTL_MODE_CREATE_DUMB failed: Permission denied
KMS: DRM_IOCTL_MODE_CREATE_DUMB failed: Permission denied
This problem happened 3/3 times.
STEPS TO REPRODUCE
1. Boot a Fedora 40 KDE Plasma installation updated to 2024-5-31 with
updates-testing enabled
2. Log in to Plasma 6.0.5 on Wayland
3. Start Konsole
4. Install GNOME Boxes if it isn't already with sudo dnf install gnome-boxes
5. Download Fedora-KDE-Live-x86_64-Rawhide-20240531.n.0.iso from
https://koji.fedoraproject.org/koji/buildinfo?buildID=2459206
6. Start GNOME Boxes
7. Boot Fedora-KDE-Live-x86_64-Rawhide-20240531.n.0.iso in a GNOME Boxes
QEMU/KVM VM with 3 GiB RAM, UEFI enabled, and 3D acceleration disabled using
the llvmpipe mesa driver
8. Start Konsole
9. In Konsole, run
export $(dbus-launch)
kwin_wayland --xwayland
OBSERVED RESULT
Nested kwin_wayland 6.0.90.1's window didn't appear in VMs using the llvmpipe
driver
EXPECTED RESULT
Nested kwin_wayland 6.0.90.1's window should have appeared
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Fedora Rawhide
(available in About System)
KDE Plasma Version: 6.0.90
KDE Frameworks Version: 6.2.0
Qt Version: 6.7.1
ADDITIONAL INFORMATION
Nested kwin_wayland 6.0.5 and 6.0.4 crashed with different traces from each
other in VMs using llvmpipe https://bugs.kde.org/show_bug.cgi?id=487857
https://bugs.kde.org/show_bug.cgi?id=487217
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