在 arch linux 升级之后，我的 x-server 似乎真的不稳定......用 exwm 启动 emacs 不再起作用了。我已经安装了 gnome 并且它确实可以工作（有时非常不稳定）。我用 pacman 降级了我的系统，但 x-server 仍然无法工作。
当 x 服务器发生故障时，日志文件如下：
Time: Tue Nov 26 22:12:45 2019
[ 567.803] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[ 567.803] (==) No Layout section. Using the first Screen section.
[ 567.803] (==) No screen section available. Using defaults.
[ 567.803] (**) |-->Screen "Default Screen Section" (0)
[ 567.803] (**) | |-->Monitor "<default monitor>"
[ 567.803] (==) No monitor specified for screen "Default Screen Section".
Using a default monitor configuration.
[ 567.803] (==) Automatically adding devices
[ 567.803] (==) Automatically enabling devices
[ 567.803] (==) Automatically adding GPU devices
[ 567.803] (==) Automatically binding GPU devices
[ 567.803] (==) Max clients allowed: 256, resource mask: 0x1fffff
[ 567.803] (WW) The directory "/usr/share/fonts/misc" does not exist.
[ 567.803] Entry deleted from font path.
[ 567.803] (WW) The directory "/usr/share/fonts/OTF" does not exist.
[ 567.803] Entry deleted from font path.
[ 567.803] (WW) The directory "/usr/share/fonts/Type1" does not exist.
[ 567.803] Entry deleted from font path.
[ 567.803] (WW) The directory "/usr/share/fonts/100dpi" does not exist.
[ 567.803] Entry deleted from font path.
[ 567.803] (WW) The directory "/usr/share/fonts/75dpi" does not exist.
[ 567.803] Entry deleted from font path.
[ 567.803] (==) FontPath set to:
/usr/share/fonts/TTF
[ 567.803] (==) ModulePath set to "/usr/lib/xorg/modules"
[ 567.803] (II) The server relies on udev to provide the list of input devices.
If no devices become available, reconfigure udev or disable AutoAddDevices.
[ 567.803] (II) Module ABI versions:
[ 567.803] X.Org ANSI C Emulation: 0.4
[ 567.803] X.Org Video Driver: 24.0
[ 567.803] X.Org XInput driver : 24.1
[ 567.803] X.Org Server Extension : 10.0
[ 567.804] (++) using VT number 2
[ 567.805] (II) systemd-logind: took control of session /org/freedesktop/login1/session/_33
[ 567.806] (II) xfree86: Adding drm device (/dev/dri/card0)
[ 567.806] (EE) systemd-logind: failed to take device /dev/dri/card0: Operation not permitted
[ 567.807] (EE) /dev/dri/card0: failed to set DRM interface version 1.4: Permission denied
[ 567.808] (--) PCI:*(0@0:2:0) 8086:0a16:17aa:3978 rev 9, Mem @ 0xb0000000/4194304, 0xa0000000/268435456, I/O @ 0x00003000/64, BIOS @ 0x????????/131072
[ 567.808] (WW) Open ACPI failed (/var/run/acpid.socket) (No such file or directory)
[ 567.808] (II) LoadModule: "glx"
[ 567.808] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[ 567.809] (II) Module glx: vendor="X.Org Foundation"
[ 567.809] compiled for 1.20.5, module version = 1.0.0
[ 567.809] ABI class: X.Org Server Extension, version 10.0
[ 567.809] (==) Matched intel as autoconfigured driver 0
[ 567.809] (==) Matched modesetting as autoconfigured driver 1
[ 567.809] (==) Matched fbdev as autoconfigured driver 2
[ 567.809] (==) Matched vesa as autoconfigured driver 3
[ 567.809] (==) Assigned the driver to the xf86ConfigLayout
[ 567.809] (II) LoadModule: "intel"
[ 567.809] (II) Loading /usr/lib/xorg/modules/drivers/intel_drv.so
[ 567.810] (II) Module intel: vendor="X.Org Foundation"
[ 567.810] compiled for 1.20.5, module version = 2.99.917
[ 567.810] Module class: X.Org Video Driver
[ 567.810] ABI class: X.Org Video Driver, version 24.0
[ 567.810] (II) LoadModule: "modesetting"
[ 567.810] (II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so
[ 567.810] (II) Module modesetting: vendor="X.Org Foundation"
[ 567.810] compiled for 1.20.5, module version = 1.20.5
[ 567.810] Module class: X.Org Video Driver
[ 567.810] ABI class: X.Org Video Driver, version 24.0
[ 567.810] (II) LoadModule: "fbdev"
[ 567.810] (WW) Warning, couldn't open module fbdev
[ 567.810] (EE) Failed to load module "fbdev" (module does not exist, 0)
[ 567.810] (II) LoadModule: "vesa"
[ 567.810] (WW) Warning, couldn't open module vesa
[ 567.810] (EE) Failed to load module "vesa" (module does not exist, 0)
[ 567.810] (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
[ 567.810] (II) intel: Driver for Intel(R) HD Graphics
[ 567.810] (II) intel: Driver for Intel(R) Iris(TM) Graphics
[ 567.810] (II) intel: Driver for Intel(R) Iris(TM) Pro Graphics
[ 567.810] (II) modesetting: Driver for Modesetting Kernel Drivers: kms
[ 567.811] xf86EnableIOPorts: failed to set IOPL for I/O (Operation not permitted)
[ 567.811] (II) intel(0): Using Kernel Mode Setting driver: i915, version 1.6.0 20190619
[ 567.811] (II) intel(0): SNA compiled from 2.99.917-893-gbff5eca4
[ 567.827] (WW) Falling back to old probe method for modesetting
[ 567.827] (WW) VGA arbiter: cannot open kernel arbiter, no multi-card support
[ 570.107] (EE) intel(0): [drm] failed to set drm interface version: Permission denied [13].
[ 570.107] (EE) intel(0): Failed to claim DRM device.
[ 570.107] (II) UnloadModule: "intel"
[ 570.107] (EE) Screen(s) found, but none have a usable configuration.
[ 570.107] (EE)
Fatal server error:
[ 570.107] (EE) no screens found(EE)
[ 570.107] (EE)
Please consult the The X.Org Foundation support
at http://wiki.x.org
for help.
[ 570.107] (EE) Please also check the log file at "/home/tuedachu/.local/share/xorg/Xorg.1.log" for additional information.
[ 570.107] (EE)
[ 570.130] (EE) Server terminated with error (1). Closing log file.
在系统升级之前我的配置运行良好。
有人有想法吗？谢谢。
阿尔诺