.. _dumb_buffer_permission_denied: ================================================== "failed to export dumb buffer: Permission denied" ================================================== 我在 :ref:`wayland` 的 :ref:`sway` 图形管理桌面中运行一些GTK应用，始终会出现报错:: failed to export dumb buffer: Permission denied Failed to create scanout resource failed to export dumb buffer: Permission denied Failed to create scanout resource ** (midori:13469): WARNING **: 19:51:04.254: GDK is not able to create a GL context, falling back to glReadPixels (slow!): Unable to create a GL context failed to export dumb buffer: Permission denied Failed to create scanout resource failed to export dumb buffer: Permission denied Failed to create scanout resource 以上是 ``midori`` 浏览器的报错信息，无法浏览网络。 参考 `GNOME Applications under Wayland `_ 尝试添加环境变量:: GDK_BACKEND=wayland midori 但是报错依旧...从midori的界面看，不断出现 ``Oops`` 上述报错看起来是无法访问内核 framebuffer device 导致的 按照 `arch linxu: Midori#Wayand `_ 说明：在使用 :ref:`wayland` 的窗口管理器运行Midori时如果想激活客户端装饰(client side decorations)，则使用 ``GTK_CSD=1`` 我尝试了一下 ``qutebrowser`` ，报错信息也是一样的:: failed to export dumb buffer: Permission denied Failed to create scanout resource 20:19:32 INFO: Run :adblock-update to get adblock lists. failed to export dumb buffer: Permission denied Failed to create scanout resource ... zsh: segmentation fault qutebrowser 但是参考 `voidlinux handbook: Wayland `_ 基于 GTK+ 和 Qt5 的浏览器，例如Midori和qutebrowser应该是原生就可以运行在Wayland的。 参考 `No HDMI output on Raspberry Pi 4 #453 `_ 和 `RaspberryPi 4 DRM not working with YoE #461 `_ 树莓派图形加速需要启用KMS，启动配置需要从:: dtoverlay=vc4-fkms-v3d 修改成:: dtoverlay=vc4-kms-v3d 参考 ======= - `GNOME Applications under Wayland `_