首先，我在尝试使用 xrandr 设置外部显示器时遇到了各种问题，这些显示器已成功配置，然后断开连接并重新连接，可能是在笔记本电脑处于睡眠状态之后。在这些情况下，每次尝试使用 xrandr，甚至--auto都会导致xrandr: Configure crtc 1 failed。我提到这一点是因为我怀疑它与更大的问题有关……
后来我让笔记本电脑进入睡眠状态，然后将其唤醒，结果屏幕一片漆黑。我按下 ctrl+alt+f5，虚拟终端工作正常，然后我按下 ctrl+alt+f2 返回默认 GUI，结果在左上角只看到一个白色下划线光标。ctrl+alt+f1 将我带到备用 GUI，它启动正常，并显示 GUI 登录提示。ctrl+alt+f2 将我带到一个我没想到的文本 tty2。
以下是我认为的一些关键日志条目：
dmesg：
[drm:intel_display_resume [i915]] *ERROR* Restoring old state failed with -22
Xorg.0.日志：
[ 2439.364] (II) event3 - Power Button: device removed
[ 2439.400] (II) event5 - Video Bus: device removed
[ 2439.424] (II) event1 - Power Button: device removed
[ 2439.440] (II) event2 - Sleep Button: device removed
[ 2439.456] (II) event7 - Integrated Webcam_HD: Integrate: device removed
[ 2439.488] (II) event8 - DELL081C:00 044E:121F Mouse: device removed
[ 2439.521] (II) event10 - DELL081C:00 044E:121F Touchpad: device removed
[ 2439.552] (II) event11 - DELL081C:00 044E:121F UNKNOWN: device removed
[ 2439.576] (II) event9 - Intel HID events: device removed
[ 2439.600] (II) event6 - Dell WMI hotkeys: device removed
[ 2439.616] (II) event4 - AT Translated Set 2 keyboard: device removed
[ 2439.632] (II) AIGLX: Suspending AIGLX clients for VT switch
[ 2447.245] (II) AIGLX: Resuming AIGLX clients after VT switch
[ 2448.382] (EE) modeset(0): failed to set mode: No such file or directory
[ 2448.382] (EE)
Fatal server error:
[ 2448.382] (EE) EnterVT failed for screen 0
[ 2448.382] (EE)
[ 2448.382] (EE)
Please consult the The X.Org Foundation support
at http://wiki.x.org
for help.
[ 2448.382] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[ 2448.382] (EE)
[ 2448.382] (II) AIGLX: Suspending AIGLX clients for VT switch
[ 2449.545] (EE) Server terminated with error (1). Closing log file.
我不知道如何从这里继续进行进一步的故障排除。