Arch-Linux
手動啟動 X 伺服器後無法訪問虛擬終端
我正在開發一個顯示管理器。當 X 伺服器已經啟動時，我的顯示管理器工作正常並且能夠登錄使用者。然而，為了讓它成為一個合適的顯示管理器，它需要能夠自己啟動一個 X 伺服器。
通過查看的輸出
ps aux | grep X，並通過檢查另一個輕量級顯示管理器 (SLiM) 的原始碼，我認為我的顯示管理器應該執行以下命令：/usr/bin/Xorg.bin :0 vt1這是假設目前沒有其他顯示管理器/X 伺服器在執行。
問題是當我的程序執行該命令或手動執行該命令時，我會切換到我指定的虛擬終端，然後系統“掛起”。我實際上不確定它是否掛起，或者只是我無法訪問其他虛擬終端（我認為是後者）。這是我重新啟動機器後的 Xorg.log：
[ 631.692] X.Org X Server 1.16.3 Release Date: 2014-12-20 [ 631.692] X Protocol Version 11, Revision 0 [ 631.692] Build Operating System: Linux 3.18.1-1-ARCH x86_64 [ 631.692] Current Operating System: Linux arch 3.17.6-1-ARCH #1 SMP PREEMPT Sun Dec 7 23:43:32 UTC 2014 x86_64 [ 631.692] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-linux root=UUID=5ba710b1-c7b7-410d-baed-d6670f818d56 rw quiet [ 631.692] Build Date: 29 December 2014 01:09:58PM [ 631.693] [ 631.693] Current version of pixman: 0.32.6 [ 631.693] Before reporting problems, check http://wiki.x.org to make sure that you have the latest version. [ 631.693] Markers: (--) probed, (**) from config file, (==) default setting, (++) from command line, (!!) notice, (II) informational, (WW) warning, (EE) error, (NI) not implemented, (??) unknown. [ 631.693] (==) Log file: "/var/log/Xorg.0.log", Time: Sat Jan 3 23:38:54 2015 [ 631.865] (==) Using config directory: "/etc/X11/xorg.conf.d" [ 631.865] (==) Using system config directory "/usr/share/X11/xorg.conf.d" [ 631.911] (==) No Layout section. Using the first Screen section. [ 631.911] (==) No screen section available. Using defaults. [ 631.911] (**) |-->Screen "Default Screen Section" (0) [ 631.911] (**) | |-->Monitor "<default monitor>" [ 631.918] (==) No device specified for screen "Default Screen Section". Using the first device section listed. [ 631.918] (**) | |-->Device "Intel Graphics" [ 631.918] (==) No monitor specified for screen "Default Screen Section". Using a default monitor configuration. [ 631.918] (==) Automatically adding devices [ 631.918] (==) Automatically enabling devices [ 631.918] (==) Automatically adding GPU devices [ 631.996] (WW) `fonts.dir' not found (or not valid) in "/usr/share/fonts/OTF/". [ 631.996] Entry deleted from font path. [ 631.996] (Run 'mkfontdir' on "/usr/share/fonts/OTF/"). [ 632.040] (WW) `fonts.dir' not found (or not valid) in "/usr/share/fonts/100dpi/". [ 632.040] Entry deleted from font path. [ 632.040] (Run 'mkfontdir' on "/usr/share/fonts/100dpi/"). [ 632.040] (WW) `fonts.dir' not found (or not valid) in "/usr/share/fonts/75dpi/". [ 632.040] Entry deleted from font path. [ 632.040] (Run 'mkfontdir' on "/usr/share/fonts/75dpi/"). [ 632.040] (==) FontPath set to: /usr/share/fonts/misc/, /usr/share/fonts/TTF/, /usr/share/fonts/Type1/ [ 632.040] (==) ModulePath set to "/usr/lib/xorg/modules" [ 632.040] (II) The server relies on udev to provide the list of input devices. If no devices become available, reconfigure udev or disable AutoAddDevices. [ 632.047] (II) Loader magic: 0x818d80 [ 632.047] (II) Module ABI versions: [ 632.047] X.Org ANSI C Emulation: 0.4 [ 632.047] X.Org Video Driver: 18.0 [ 632.047] X.Org XInput driver : 21.0 [ 632.047] X.Org Server Extension : 8.0 [ 632.051] (II) systemd-logind: took control of session /org/freedesktop/login1/session/c1 [ 632.052] (II) xfree86: Adding drm device (/dev/dri/card1) [ 632.053] (II) systemd-logind: got fd for /dev/dri/card1 226:1 fd 10 paused 0 [ 632.053] (II) xfree86: Adding drm device (/dev/dri/card0) [ 632.054] (II) systemd-logind: got fd for /dev/dri/card0 226:0 fd 11 paused 0 [ 632.058] (--) PCI:*(0:0:2:0) 8086:0116:103c:185d rev 9, Mem @ 0xc0000000/4194304, 0xb0000000/268435456, I/O @ 0x00006000/64 [ 632.058] (--) PCI: (0:1:0:0) 1002:6760:103c:185d rev 0, Mem @ 0xa0000000/268435456, 0xc6500000/131072, I/O @ 0x00005000/256, BIOS @ 0x????????/131072 [ 632.058] (WW) Open ACPI failed (/var/run/acpid.socket) (No such file or directory) [ 632.059] (II) LoadModule: "glx" [ 632.097] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so [ 632.114] (II) Module glx: vendor="X.Org Foundation" [ 632.114] compiled for 1.16.3, module version = 1.0.0 [ 632.114] ABI class: X.Org Server Extension, version 8.0 [ 632.114] (==) AIGLX enabled [ 632.114] (II) LoadModule: "intel" [ 632.114] (II) Loading /usr/lib/xorg/modules/drivers/intel_drv.so [ 632.161] (II) Module intel: vendor="X.Org Foundation" [ 632.161] compiled for 1.16.3, module version = 2.99.917 [ 632.161] Module class: X.Org Video Driver [ 632.161] ABI class: X.Org Video Driver, version 18.0 [ 632.161] (II) intel: Driver for Intel(R) Integrated Graphics Chipsets: i810, i810-dc100, i810e, i815, i830M, 845G, 854, 852GM/855GM, 865G, 915G, E7221 (i915), 915GM, 945G, 945GM, 945GME, Pineview GM, Pineview G, 965G, G35, 965Q, 946GZ, 965GM, 965GME/GLE, G33, Q35, Q33, GM45, 4 Series, G45/G43, Q45/Q43, G41, B43 [ 632.162] (II) intel: Driver for Intel(R) HD Graphics: 2000-6000 [ 632.162] (II) intel: Driver for Intel(R) Iris(TM) Graphics: 5100, 6100 [ 632.162] (II) intel: Driver for Intel(R) Iris(TM) Pro Graphics: 5200, 6200, P6300 [ 632.162] (++) using VT number 2 [ 632.177] (II) intel(0): Using Kernel Mode Setting driver: i915, version 1.6.0 20140725 [ 632.184] (--) intel(0): Integrated Graphics Chipset: Intel(R) HD Graphics 3000 [ 632.184] (--) intel(0): CPU: x86-64, sse2, sse3, ssse3, sse4.1, sse4.2, avx [ 632.184] (II) intel(0): Creating default Display subsection in Screen section "Default Screen Section" for depth/fbbpp 24/32 [ 632.184] (==) intel(0): Depth 24, (--) framebuffer bpp 32 [ 632.184] (==) intel(0): RGB weight 888 [ 632.184] (==) intel(0): Default visual is TrueColor [ 632.184] (**) intel(0): Option "AccelMethod" "sna" [ 632.184] (**) intel(0): Option "Backlight" "intel_backlight" [ 632.184] (II) intel(0): Output LVDS1 has no monitor section [ 632.184] (**) intel(0): Found backlight control interface intel_backlight (type 'raw') for output LVDS1 [ 632.184] (II) intel(0): Enabled output LVDS1 [ 632.185] (II) intel(0): Output VGA1 has no monitor section [ 632.185] (II) intel(0): Enabled output VGA1 [ 632.185] (II) intel(0): Output HDMI1 has no monitor section [ 632.185] (II) intel(0): Enabled output HDMI1 [ 632.185] (II) intel(0): Output DP1 has no monitor section [ 632.185] (II) intel(0): Enabled output DP1 [ 632.185] (--) intel(0): Using a maximum size of 256x256 for hardware cursors [ 632.185] (II) intel(0): Output VIRTUAL1 has no monitor section [ 632.185] (II) intel(0): Enabled output VIRTUAL1 [ 632.185] (--) intel(0): Output LVDS1 using initial mode 1366x768 on pipe 0 [ 632.185] (--) intel(0): Output HDMI1 using initial mode 1920x1080 on pipe 1 [ 632.185] (==) intel(0): TearFree disabled [ 632.185] (==) intel(0): DPI set to (96, 96) [ 632.185] (II) Loading sub module "dri2" [ 632.185] (II) LoadModule: "dri2" [ 632.185] (II) Module "dri2" already built-in [ 632.185] (II) Loading sub module "present" [ 632.185] (II) LoadModule: "present" [ 632.185] (II) Module "present" already built-in [ 632.185] (==) Depth 24 pixmap format is 32 bpp [ 632.201] (II) intel(0): SNA initialized with Sandybridge (gen6, gt2) backend [ 632.201] (==) intel(0): Backing store enabled [ 632.201] (==) intel(0): Silken mouse enabled [ 632.202] (II) intel(0): HW Cursor enabled [ 632.202] (II) intel(0): RandR 1.2 enabled, ignore the following RandR disabled message. [ 632.204] (==) intel(0): DPMS enabled [ 632.204] (==) intel(0): display hotplug detection enabled [ 632.204] (II) intel(0): [DRI2] Setup complete [ 632.204] (II) intel(0): [DRI2] DRI driver: i965 [ 632.204] (II) intel(0): [DRI2] VDPAU driver: i965 [ 632.204] (II) intel(0): direct rendering: DRI2 enabled [ 632.204] (II) intel(0): hardware support for Present enabled [ 632.204] (--) RandR disabled [ 632.390] (II) AIGLX: enabled GLX_MESA_copy_sub_buffer [ 632.390] (II) AIGLX: enabled GLX_ARB_create_context [ 632.390] (II) AIGLX: enabled GLX_ARB_create_context_profile [ 632.390] (II) AIGLX: enabled GLX_EXT_create_context_es2_profile [ 632.390] (II) AIGLX: enabled GLX_INTEL_swap_event [ 632.390] (II) AIGLX: enabled GLX_SGI_swap_control and GLX_MESA_swap_control [ 632.390] (II) AIGLX: enabled GLX_EXT_framebuffer_sRGB [ 632.390] (II) AIGLX: enabled GLX_ARB_fbconfig_float [ 632.390] (II) AIGLX: GLX_EXT_texture_from_pixmap backed by buffer objects [ 632.390] (II) AIGLX: enabled GLX_ARB_create_context_robustness [ 632.391] (II) AIGLX: Loaded and initialized i965 [ 632.391] (II) GLX: Initialized DRI2 GL provider for screen 0 [ 632.405] (II) intel(0): switch to mode 1366x768@60.0 on LVDS1 using pipe 0, position (0, 0), rotation normal, reflection none [ 632.407] (EE) intel(0): failed to set mode: Permission denied [13] [ 632.408] (II) intel(0): switch to mode 1920x1080@60.0 on HDMI1 using pipe 1, position (0, 0), rotation normal, reflection none [ 632.413] (EE) intel(0): failed to set mode: Permission denied [13] [ 632.413] (WW) intel(0): failed to restore desired modes on VT switch [ 632.413] (EE) intel(0): sna_mode_check: invalid state found on pipe 0, disabling CRTC:7 [ 632.413] (EE) intel(0): sna_mode_check: invalid state found on pipe 1, disabling CRTC:11 [ 632.769] (II) config/udev: Adding input device Power Button (/dev/input/event4) [ 632.769] (**) Power Button: Applying InputClass "evdev keyboard catchall" [ 632.769] (II) LoadModule: "evdev" [ 632.813] (II) Loading /usr/lib/xorg/modules/input/evdev_drv.so [ 632.876] (II) Module evdev: vendor="X.Org Foundation" [ 632.876] compiled for 1.16.2, module version = 2.9.1 [ 632.876] Module class: X.Org XInput Driver [ 632.876] ABI class: X.Org XInput driver, version 21.0 [ 632.878] (II) systemd-logind: got fd for /dev/input/event4 13:68 fd 18 paused 1 [ 632.878] (II) systemd-logind: releasing fd for 13:68 [ 632.904] (II) config/udev: Adding input device Video Bus (/dev/input/event16) [ 632.904] (**) Video Bus: Applying InputClass "evdev keyboard catchall" [ 632.905] (II) systemd-logind: got fd for /dev/input/event16 13:80 fd 18 paused 1 [ 632.905] (II) systemd-logind: releasing fd for 13:80 [ 632.930] (II) config/udev: Adding input device Lid Switch (/dev/input/event1) [ 632.931] (II) No input driver specified, ignoring this device. [ 632.931] (II) This device may have been added with another device file. [ 632.931] (II) config/udev: Adding input device Video Bus (/dev/input/event11) [ 632.931] (**) Video Bus: Applying InputClass "evdev keyboard catchall" [ 632.933] (II) systemd-logind: got fd for /dev/input/event11 13:75 fd 18 paused 1 [ 632.933] (II) systemd-logind: releasing fd for 13:75 [ 632.955] (II) config/udev: Adding input device Power Button (/dev/input/event3) [ 632.955] (**) Power Button: Applying InputClass "evdev keyboard catchall" [ 632.956] (II) systemd-logind: got fd for /dev/input/event3 13:67 fd 18 paused 1 [ 632.956] (II) systemd-logind: releasing fd for 13:67 [ 632.984] (II) config/udev: Adding input device HDA Digital PCBeep (/dev/input/event6) [ 632.984] (II) No input driver specified, ignoring this device. [ 632.984] (II) This device may have been added with another device file. [ 632.985] (II) config/udev: Adding input device HDA Intel PCH Front Headphone (/dev/input/event8) [ 632.985] (II) No input driver specified, ignoring this device. [ 632.985] (II) This device may have been added with another device file. [ 632.985] (II) config/udev: Adding input device HDA Intel PCH HDMI/DP,pcm=3 (/dev/input/event9) [ 632.985] (II) No input driver specified, ignoring this device. [ 632.985] (II) This device may have been added with another device file. [ 632.986] (II) config/udev: Adding input device HDA Intel PCH Mic (/dev/input/event7) [ 632.986] (II) No input driver specified, ignoring this device. [ 632.986] (II) This device may have been added with another device file. [ 632.986] (II) config/udev: Adding input device Logitech USB Receiver (/dev/input/event13) [ 632.986] (**) Logitech USB Receiver: Applying InputClass "evdev pointer catchall" [ 632.988] (II) systemd-logind: got fd for /dev/input/event13 13:77 fd 18 paused 1 [ 632.988] (II) systemd-logind: releasing fd for 13:77 [ 633.048] (II) config/udev: Adding input device Logitech USB Receiver (/dev/input/mouse1) [ 633.048] (II) No input driver specified, ignoring this device. [ 633.048] (II) This device may have been added with another device file. [ 633.049] (II) config/udev: Adding input device Logitech USB Receiver (/dev/input/event14) [ 633.049] (**) Logitech USB Receiver: Applying InputClass "evdev keyboard catchall" [ 633.050] (II) systemd-logind: got fd for /dev/input/event14 13:78 fd 18 paused 1 [ 633.050] (II) systemd-logind: releasing fd for 13:78 [ 633.104] (II) config/udev: Adding input device Microsft Microsoft Wireless Desktop Receiver 3.1 (/dev/input/event12) [ 633.104] (**) Microsft Microsoft Wireless Desktop Receiver 3.1: Applying InputClass "evdev keyboard catchall" [ 633.105] (II) systemd-logind: got fd for /dev/input/event12 13:76 fd 18 paused 1 [ 633.105] (II) systemd-logind: releasing fd for 13:76 [ 633.160] (II) config/udev: Adding input device Microsft Microsoft Wireless Desktop Receiver 3.1 (/dev/input/event15) [ 633.161] (**) Microsft Microsoft Wireless Desktop Receiver 3.1: Applying InputClass "evdev pointer catchall" [ 633.161] (**) Microsft Microsoft Wireless Desktop Receiver 3.1: Applying InputClass "evdev keyboard catchall" [ 633.162] (II) systemd-logind: got fd for /dev/input/event15 13:79 fd 18 paused 1 [ 633.162] (II) systemd-logind: releasing fd for 13:79 [ 633.224] (II) config/udev: Adding input device Microsft Microsoft Wireless Desktop Receiver 3.1 (/dev/input/mouse2) [ 633.224] (II) No input driver specified, ignoring this device. [ 633.224] (II) This device may have been added with another device file. [ 633.224] (II) config/udev: Adding input device AT Translated Set 2 keyboard (/dev/input/event0) [ 633.224] (**) AT Translated Set 2 keyboard: Applying InputClass "evdev keyboard catchall" [ 633.226] (II) systemd-logind: got fd for /dev/input/event0 13:64 fd 18 paused 1 [ 633.226] (II) systemd-logind: releasing fd for 13:64 [ 633.290] (II) config/udev: Adding input device SynPS/2 Synaptics TouchPad (/dev/input/event10) [ 633.290] (**) SynPS/2 Synaptics TouchPad: Applying InputClass "evdev touchpad catchall" [ 633.290] (**) SynPS/2 Synaptics TouchPad: Applying InputClass "touchpad catchall" [ 633.290] (**) SynPS/2 Synaptics TouchPad: Applying InputClass "Default clickpad buttons" [ 633.290] (II) LoadModule: "synaptics" [ 633.291] (II) Loading /usr/lib/xorg/modules/input/synaptics_drv.so [ 633.346] (II) Module synaptics: vendor="X.Org Foundation" [ 633.346] compiled for 1.16.0, module version = 1.8.1 [ 633.346] Module class: X.Org XInput Driver [ 633.346] ABI class: X.Org XInput driver, version 21.0 [ 633.348] (II) systemd-logind: got fd for /dev/input/event10 13:74 fd 18 paused 1 [ 633.348] (II) systemd-logind: releasing fd for 13:74 [ 633.397] (II) config/udev: Adding input device SynPS/2 Synaptics TouchPad (/dev/input/mouse0) [ 633.397] (**) SynPS/2 Synaptics TouchPad: Ignoring device from InputClass "touchpad ignore duplicates" [ 633.397] (II) config/udev: Adding input device ST LIS3LV02DL Accelerometer (/dev/input/event2) [ 633.397] (II) No input driver specified, ignoring this device. [ 633.397] (II) This device may have been added with another device file. [ 633.398] (II) config/udev: Adding input device ST LIS3LV02DL Accelerometer (/dev/input/js0) [ 633.398] (II) No input driver specified, ignoring this device. [ 633.398] (II) This device may have been added with another device file. [ 633.399] (II) config/udev: Adding input device HP WMI hotkeys (/dev/input/event5) [ 633.399] (**) HP WMI hotkeys: Applying InputClass "evdev keyboard catchall" [ 633.400] (II) systemd-logind: got fd for /dev/input/event5 13:69 fd 18 paused 1 [ 633.400] (II) systemd-logind: releasing fd for 13:69我正在使用帶有 X 伺服器版本 1.16.3 的 Arch Linux。IRC 上#xorg 上的一個人證實，在他們的系統上，執行我指定的命令仍然允許他們訪問其他虛擬終端，儘管他們使用的是 xorg 版本 1.15 而不是在 Arch Linux 上。
其他任何人都可以確認他們的系統是否像我描述的那樣執行（如果它的行為像我的那樣，你需要重新啟動你的系統）。如何手動啟動 X 伺服器並仍然可以訪問其他虛擬終端？
我在這裡找到了答案：https ://www.archlinux.org/news/xorg-server-116-is-now-available/
X 現在在 systemd-logind 的幫助下是無根的，這也意味著它必須從用於登錄的同一虛擬終端啟動，重定向 stderr 也會破壞無根登錄。舊的根執行行為可以通過 Xorg.wrap 配置文件（man xorg.wrap）恢復。請注意，通過登錄管理器（gdm、kdm、…）啟動 X 尚不提供無根訪問。
我試圖在與我所在的 tty 不同的 tty 上啟動 X。