在启动时，我会看到一个图形活动指示器（“throbber”:)。按 ESC 键会显示更传统的文本行流，例如
[ OK ] Started GNOME Display Manager.
然而，其中大多数似乎会重复两次。我不是在谈论额外的“起始”行。看起来像
[ OK ] Started GNOME Display Manager.
[ OK ] Started GNOME Display Manager.
有时，两个消息流也会出现相互中断，即两条线混合在一起。这是 systemd 中的错误吗？或者在普利茅斯的行李箱显示屏上？
编辑：重复不会出现在/var/log/boot.log（由普利茅斯生成，包括用于将“OK”标记为绿色的转义序列）。所以这看起来更像是普利茅斯显示器的问题。
编辑：有时会发生这种情况，有时不会。除了影响服务启动消息之外，它似乎还会影响离线更新（GNOME 中的“重新启动和更新”）打印的消息和进度%。
如果我从内核命令行中删除rhgb或同时删除rhgb和选项，也不会发生这种情况。quiet我在虚拟机（virt-manager）中没有看到它；看起来图形启动画面根本不起作用。
系统：Fedora Linux 25 / 26。我还没有自定义我的机器上的启动显示。
答案1
我确定这是普利茅斯虫子。
部分基于更新的问题，但我刚刚尝试使用plymouth.debug.由于某种原因，我的一个屏幕似乎有两个“像素显示器”，并且两者似乎都与tty1...的句柄相关联。
看起来上游已经对此进行了修复，耶！https://bugs.freedesktop.org/show_bug.cgi?id=104353
[ply-keyboard.c:213] process_keyboard_input:escape key!
[main.c:1485] on_escape_pressed:escape key pressed
[main.c:1465] toggle_between_splash_and_details:toggling between splash and details
[main.c:1467] toggle_between_splash_and_details:hiding and freeing current splash
[ply-event-loop.c:965] ply_event_loop_stop_watching_for_timeout:no matching timeout found for removal
[./plugin.c:1195] hide_splash_screen:hiding splash
[./plugin.c:818] stop_animation:stopping animation
[./plugin.c:831] stop_animation:hiding progress animation
[ply-animation.c:357] ply_animation_stop:animation already stopped, ignoring stop request
[./plugin.c:831] stop_animation:hiding progress animation
[ply-animation.c:357] ply_animation_stop:animation already stopped, ignoring stop request
[ply-boot-splash.c:388] ply_boot_splash_free:freeing splash
[ply-event-loop.c:965] ply_event_loop_stop_watching_for_timeout:no matching timeout found for removal
[ply-boot-splash.c:333] remove_pixel_displays:removing pixel displays
[ply-boot-splash.c:347] remove_pixel_displays:Removing 1366x768 pixel display
[./plugin.c:1014] remove_pixel_display:removing pixel display from plugin
[ply-boot-splash.c:347] remove_pixel_displays:Removing 1366x768 pixel display
[./plugin.c:1014] remove_pixel_display:removing pixel display from plugin
[./plugin.c:700] destroy_plugin:destroying plugin
[./plugin.c:673] free_views:freeing views
[main.c:352] show_detailed_splash:Showing detailed splash screen
[main.c:1655] load_built_in_theme:Loading built-in theme
[plugins/splash/details/plugin.c:156] create_plugin:creating plugin
[main.c:1670] load_built_in_theme:attaching plugin to event loop
[main.c:1673] load_built_in_theme:attaching progress to plugin
[ply-boot-splash.c:174] ply_boot_splash_add_text_display:adding 170x48 text display
[ply-terminal.c:598] ply_terminal_open:terminal /dev/tty1 is already open
[ply-boot-splash.c:174] ply_boot_splash_add_text_display:adding 170x48 text display
[ply-terminal.c:598] ply_terminal_open:terminal /dev/tty1 is already open