lightdm 尝试使用不存在的外部显示器

我在登录我的 X 会话和/或从暂停状态恢复时遇到问题。

从大约 6 个月前开始，我的桌面管理器 lightdm 开始出现问题（尽管我尝试过其他类似 gdm3 的管理器并得到相同的行为）。

在我使用外接显示器后，问题就会开始出现。似乎不是在我的笔记本电脑上显示欢迎屏幕，而是尝试使用不存在的外部显示器。在笔记本电脑显示屏上，我看到一个几乎空白的屏幕，左上角有一个下划线“_”。

这种行为特别烦人，因为它试图使用外接显示器，我什至无法访问任何虚拟终端，必须硬重启进入恢复模式。值得注意的是，如果我使用恢复模式启动然后选择resume，我会收到欢迎程序并可以登录。

/etc/lightdm/lightdm.conf最终，当我使用以下内容创建文件时，我似乎解决了问题

[Seat:*]
display-setup-script=xrandr --output eDP --primary

这似乎解决了问题，即我可以使用正常的启动过程，在我的笔记本电脑显示器上获取欢迎程序，并在需要时使用外部显示器。

但是，从上周开始，此修复程序不再有效。我已经重新启动，运行apt upgrade和apt update. 删除并重新安装了各种 lightdm .deb 文件，使用过dpkg-reconfigure，重新安装了 gdm3，...

我当前的内核是5.4.0-91-generic #102-Ubuntu并且我正在运行 MATE 20.04 LTS。这是一台运行 Ryzen-7 处理器和 Radeon 显卡的惠普笔记本电脑。

之前运行的 lshw 给出了

   *-display
        description: VGA compatible controller
        product: Picasso
        vendor: Advanced Micro Devices, Inc. [AMD/ATI]
        physical id: 0
        bus info: pci@0000:04:00.0
        version: c1
        width: 64 bits
        clock: 33MHz
        capabilities: pm pciexpress msi msix vga_controller bus_master cap_list
        configuration: driver=amdgpu latency=0
        resources: irq:50 memory:e0000000-efffffff memory:f0000000-f01fffff ioport:e000(size=256) memory:fe800000-fe87ffff

当前设置（恢复 -> 恢复）

$ sudo lshw -c video |less
*-display UNCLAIMED
   description: VGA compatible controller
   product: Picasso
   vendor: Advanced Micro Devices, Inc. [AMD/ATI]
   physical id: 0
   bus info: pci@0000:04:00.0
   version: c1
   width: 64 bits
   clock: 33MHz
   capabilities: pm pciexpress msi msix vga_controller bus_master cap_list
   configuration: latency=0
   resources: memory:e0000000-efffffff memory:f0000000-f01fffff ioport:e000(size=256) memory:fe800000-fe87ffff

注意行的变化configuration:。

$ apt search amdgpu表示我已安装 amdgpu。

以下是 /var/log/Xorg.0.log 中的输出

[    10.370] 
X.Org X Server 1.20.13
X Protocol Version 11, Revision 0
[    10.370] Build Operating System: linux Ubuntu
[    10.370] Current Operating System: Linux alanine 5.4.0-91-generic #102-Ubuntu SMP Fri Nov 5 16:31:28 UTC 2021 x86_64
[    10.370] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-5.4.0-91-generic root=UUID=742c43fb-bb10-4440-9d51-747c120972f6 ro
[    10.371] Build Date: 14 December 2021  02:14:13PM
[    10.371] xorg-server 2:1.20.13-1ubuntu1~20.04.2 (For technical support please see http://www.ubuntu.com/support) 
[    10.371] Current version of pixman: 0.38.4
[    10.371]    Before reporting problems, check http://wiki.x.org
    to make sure that you have the latest version.
[    10.371] Markers: (--) probed, (**) from config file, (==) default setting,
    (++) from command line, (!!) notice, (II) informational,
    (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[    10.371] (==) Log file: "/var/log/Xorg.0.log", Time: Sun Dec 26 17:08:36 2021
[    10.373] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[    10.374] (==) No Layout section.  Using the first Screen section.
[    10.374] (==) No screen section available. Using defaults.
[    10.374] (**) |-->Screen "Default Screen Section" (0)
[    10.374] (**) |   |-->Monitor "<default monitor>"
[    10.374] (==) No monitor specified for screen "Default Screen Section".
    Using a default monitor configuration.
[    10.375] (==) Automatically adding devices
[    10.375] (==) Automatically enabling devices
[    10.375] (==) Automatically adding GPU devices
[    10.375] (==) Automatically binding GPU devices
[    10.375] (==) Max clients allowed: 256, resource mask: 0x1fffff
[    10.376] (WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.
[    10.376]    Entry deleted from font path.
[    10.377] (WW) `fonts.dir' not found (or not valid) in "/usr/share/fonts/X11/100dpi/".
[    10.377]    Entry deleted from font path.
[    10.377]    (Run 'mkfontdir' on "/usr/share/fonts/X11/100dpi/").
[    10.378] (WW) `fonts.dir' not found (or not valid) in "/usr/share/fonts/X11/75dpi/".
[    10.378]    Entry deleted from font path.
[    10.378]    (Run 'mkfontdir' on "/usr/share/fonts/X11/75dpi/").
[    10.378] (WW) `fonts.dir' not found (or not valid) in "/usr/share/fonts/X11/100dpi".
[    10.378]    Entry deleted from font path.
[    10.378]    (Run 'mkfontdir' on "/usr/share/fonts/X11/100dpi").
[    10.378] (WW) `fonts.dir' not found (or not valid) in "/usr/share/fonts/X11/75dpi".
[    10.378]    Entry deleted from font path.
[    10.378]    (Run 'mkfontdir' on "/usr/share/fonts/X11/75dpi").
[    10.378] (==) FontPath set to:
    /usr/share/fonts/X11/misc,
    /usr/share/fonts/X11/Type1,
    built-ins
[    10.378] (==) ModulePath set to "/usr/lib/xorg/modules"
[    10.378] (II) The server relies on udev to provide the list of input devices.
    If no devices become available, reconfigure udev or disable AutoAddDevices.
[    10.378] (II) Loader magic: 0x556edcc6e020
[    10.378] (II) Module ABI versions:
[    10.378]    X.Org ANSI C Emulation: 0.4
[    10.378]    X.Org Video Driver: 24.1
[    10.378]    X.Org XInput driver : 24.1
[    10.378]    X.Org Server Extension : 10.0
[    10.379] (++) using VT number 7

[    10.379] (II) systemd-logind: logind integration requires -keeptty and -keeptty was not provided, disabling logind integration
[    10.380] (II) xfree86: Adding drm device (/dev/dri/card0)
[    10.393] (--) PCI:*(4@0:0:0) 1002:15d8:103c:86fd rev 193, Mem @ 0xe0000000/268435456, 0xf0000000/2097152, 0xfe800000/524288, I/O @ 0x0000e000/256
[    10.393] (II) LoadModule: "glx"
[    10.395] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[    10.403] (II) Module glx: vendor="X.Org Foundation"
[    10.403]    compiled for 1.20.13, module version = 1.0.0
[    10.403]    ABI class: X.Org Server Extension, version 10.0
[    10.403] (II) Applying OutputClass "AMDgpu" to /dev/dri/card0
[    10.403]    loading driver: amdgpu
[    10.403] (==) Matched amdgpu as autoconfigured driver 0
[    10.403] (==) Matched ati as autoconfigured driver 1
[    10.403] (==) Matched modesetting as autoconfigured driver 2
[    10.403] (==) Matched fbdev as autoconfigured driver 3
[    10.403] (==) Matched vesa as autoconfigured driver 4
[    10.403] (==) Assigned the driver to the xf86ConfigLayout
[    10.403] (II) LoadModule: "amdgpu"
[    10.403] (II) Loading /usr/lib/xorg/modules/drivers/amdgpu_drv.so
[    10.409] (II) Module amdgpu: vendor="X.Org Foundation"
[    10.409]    compiled for 1.20.5, module version = 19.1.0
[    10.409]    Module class: X.Org Video Driver
[    10.409]    ABI class: X.Org Video Driver, version 24.0
[    10.409] (II) LoadModule: "ati"
[    10.409] (II) Loading /usr/lib/xorg/modules/drivers/ati_drv.so
[    10.410] (II) Module ati: vendor="X.Org Foundation"
[    10.410]    compiled for 1.20.5, module version = 19.1.0
[    10.410]    Module class: X.Org Video Driver
[    10.410]    ABI class: X.Org Video Driver, version 24.0
[    10.423] (II) LoadModule: "modesetting"
[    10.423] (II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so
[    10.424] (II) Module modesetting: vendor="X.Org Foundation"
[    10.424]    compiled for 1.20.13, module version = 1.20.13
[    10.424]    Module class: X.Org Video Driver
[    10.424]    ABI class: X.Org Video Driver, version 24.1
[    10.424] (II) LoadModule: "fbdev"
[    10.424] (II) Loading /usr/lib/xorg/modules/drivers/fbdev_drv.so
[    10.425] (II) Module fbdev: vendor="X.Org Foundation"
[    10.425]    compiled for 1.20.1, module version = 0.5.0
[    10.425]    Module class: X.Org Video Driver
[    10.425]    ABI class: X.Org Video Driver, version 24.0
[    10.425] (II) LoadModule: "vesa"
[    10.425] (II) Loading /usr/lib/xorg/modules/drivers/vesa_drv.so
[    10.425] (II) Module vesa: vendor="X.Org Foundation"
[    10.425]    compiled for 1.20.4, module version = 2.4.0
[    10.425]    Module class: X.Org Video Driver
[    10.425]    ABI class: X.Org Video Driver, version 24.0
[    10.425] (II) AMDGPU: Driver for AMD Radeon:
    All GPUs supported by the amdgpu kernel driver
[    10.425] (II) modesetting: Driver for Modesetting Kernel Drivers: kms
[    10.425] (II) FBDEV: driver for framebuffer: fbdev
[    10.425] (II) VESA: driver for VESA chipsets: vesa
[    10.444] (II) AMDGPU(0): [KMS] Kernel modesetting enabled.
[    10.444] (WW) Falling back to old probe method for modesetting
[    10.445] (WW) Falling back to old probe method for fbdev
[    10.445] (II) Loading sub module "fbdevhw"
[    10.445] (II) LoadModule: "fbdevhw"
[    10.445] (II) Loading /usr/lib/xorg/modules/libfbdevhw.so
[    10.445] (II) Module fbdevhw: vendor="X.Org Foundation"
[    10.445]    compiled for 1.20.13, module version = 0.0.2
[    10.445]    ABI class: X.Org Video Driver, version 24.1
[    10.446] (II) AMDGPU(0): Creating default Display subsection in Screen section
    "Default Screen Section" for depth/fbbpp 24/32
[    10.446] (==) AMDGPU(0): Depth 24, (--) framebuffer bpp 32
[    10.446] (II) AMDGPU(0): Pixel depth = 24 bits stored in 4 bytes (32 bpp pixmaps)
[    10.446] (==) AMDGPU(0): Default visual is TrueColor
[    10.446] (==) AMDGPU(0): RGB weight 888
[    10.446] (II) AMDGPU(0): Using 8 bits per RGB (8 bit DAC)
[    10.446] (--) AMDGPU(0): Chipset: "AMD Radeon(TM) Vega 10 Graphics" (ChipID = 0x15d8)
[    10.446] (II) Loading sub module "fb"
[    10.446] (II) LoadModule: "fb"
[    10.446] (II) Loading /usr/lib/xorg/modules/libfb.so
[    10.447] (II) Module fb: vendor="X.Org Foundation"
[    10.447]    compiled for 1.20.13, module version = 1.0.0
[    10.447]    ABI class: X.Org ANSI C Emulation, version 0.4
[    10.447] (II) Loading sub module "dri2"
[    10.447] (II) LoadModule: "dri2"
[    10.447] (II) Module "dri2" already built-in
[    10.587] (II) Loading sub module "glamoregl"
[    10.587] (II) LoadModule: "glamoregl"
[    10.587] (II) Loading /usr/lib/xorg/modules/libglamoregl.so
[    10.593] (II) Module glamoregl: vendor="X.Org Foundation"
[    10.593]    compiled for 1.20.13, module version = 1.0.1
[    10.593]    ABI class: X.Org ANSI C Emulation, version 0.4
[    10.621] (II) AMDGPU(0): glamor X acceleration enabled on AMD Radeon(TM) Vega 10 Graphics (RAVEN, DRM 3.35.0, 5.4.0-91-generic, LLVM 12.0.0)
[    10.621] (II) AMDGPU(0): glamor detected, initialising EGL layer.
[    10.621] (==) AMDGPU(0): TearFree property default: auto
[    10.621] (==) AMDGPU(0): VariableRefresh: disabled
[    10.621] (II) AMDGPU(0): KMS Pageflipping: enabled
[    10.621] (II) AMDGPU(0): Output eDP has no monitor section
[    10.621] (II) AMDGPU(0): Output HDMI-A-0 has no monitor section
[    10.639] (II) AMDGPU(0): EDID for output eDP
[    10.639] (II) AMDGPU(0): Manufacturer: AUO  Model: 20ec  Serial#: 0
[    10.639] (II) AMDGPU(0): Year: 2018  Week: 0
[    10.640] (II) AMDGPU(0): EDID Version: 1.4
[    10.640] (II) AMDGPU(0): Digital Display Input
[    10.640] (II) AMDGPU(0): 6 bits per channel
[    10.640] (II) AMDGPU(0): Digital interface is DisplayPort
[    10.640] (II) AMDGPU(0): Max Image Size [cm]: horiz.: 34  vert.: 19
[    10.640] (II) AMDGPU(0): Gamma: 2.20
[    10.640] (II) AMDGPU(0): No DPMS capabilities specified
[    10.640] (II) AMDGPU(0): Supported color encodings: RGB 4:4:4 
[    10.640] (II) AMDGPU(0): First detailed timing is preferred mode
[    10.640] (II) AMDGPU(0): Preferred mode is native pixel format and refresh rate
[    10.640] (II) AMDGPU(0): Display is continuous-frequency
[    10.640] (II) AMDGPU(0): redX: 0.563 redY: 0.338   greenX: 0.342 greenY: 0.576
[    10.640] (II) AMDGPU(0): blueX: 0.163 blueY: 0.133   whiteX: 0.313 whiteY: 0.329
[    10.640] (II) AMDGPU(0): Manufacturer's mask: 0
[    10.640] (II) AMDGPU(0): Supported detailed timing:
[    10.640] (II) AMDGPU(0): clock: 76.3 MHz   Image Size:  344 x 193 mm
[    10.640] (II) AMDGPU(0): h_active: 1366  h_sync: 1404  h_sync_end 1426 h_blank_end 1592 h_border: 0
[    10.640] (II) AMDGPU(0): v_active: 768  v_sync: 771  v_sync_end 777 v_blanking: 798 v_border: 0
[    10.640] (II) AMDGPU(0): Supported detailed timing:
[    10.640] (II) AMDGPU(0): clock: 50.9 MHz   Image Size:  344 x 193 mm
[    10.640] (II) AMDGPU(0): h_active: 1366  h_sync: 1404  h_sync_end 1426 h_blank_end 1592 h_border: 0
[    10.640] (II) AMDGPU(0): v_active: 768  v_sync: 771  v_sync_end 777 v_blanking: 798 v_border: 0
[    10.640] (II) AMDGPU(0): Unknown vendor-specific block 2
[    10.640] (II) AMDGPU(0): EDID (in hex):
[    10.640] (II) AMDGPU(0):    00ffffffffffff0006afec2000000000
[    10.640] (II) AMDGPU(0):    001c010495221378036ac59056579329
[    10.640] (II) AMDGPU(0):    22505400000001010101010101010101
[    10.640] (II) AMDGPU(0):    010101010101ce1d56e250001e302616
[    10.640] (II) AMDGPU(0):    360058c110000018df1356e250001e30
[    10.640] (II) AMDGPU(0):    2616360058c110000018000000000000
[    10.640] (II) AMDGPU(0):    00000000000000000000000000000002
[    10.640] (II) AMDGPU(0):    001048ff0f3c6e480f1b6e20202000a0
[    10.640] (II) AMDGPU(0): Printing probed modes for output eDP
[    10.640] (II) AMDGPU(0): Modeline "1366x768"x60.1   76.30  1366 1404 1426 1592  768 771 777 798 -hsync -vsync (47.9 kHz eP)
[    10.640] (II) AMDGPU(0): Modeline "1366x768"x40.0   50.87  1366 1404 1426 1592  768 771 777 798 -hsync -vsync (32.0 kHz e)
[    10.640] (II) AMDGPU(0): Modeline "1280x720"x60.1   76.30  1280 1404 1426 1592  720 771 777 798 -hsync -vsync (47.9 kHz e)
[    10.640] (II) AMDGPU(0): Modeline "1024x768"x60.1   76.30  1024 1404 1426 1592  768 771 777 798 -hsync -vsync (47.9 kHz e)
[    10.640] (II) AMDGPU(0): Modeline "800x600"x60.1   76.30  800 1404 1426 1592  600 771 777 798 -hsync -vsync (47.9 kHz e)
[    10.640] (II) AMDGPU(0): Modeline "640x480"x60.1   76.30  640 1404 1426 1592  480 771 777 798 -hsync -vsync (47.9 kHz e)
[    10.640] (II) AMDGPU(0): EDID for output HDMI-A-0
[    10.640] (II) AMDGPU(0): Output eDP connected
[    10.640] (II) AMDGPU(0): Output HDMI-A-0 disconnected
[    10.640] (II) AMDGPU(0): Using exact sizes for initial modes
[    10.640] (II) AMDGPU(0): Output eDP using initial mode 1366x768 +0+0
[    10.640] (II) AMDGPU(0): mem size init: gart size :bf7cf000 vram size: s:7ec0b000 visible:7ec0b000
[    10.640] (==) AMDGPU(0): DPI set to (96, 96)
[    10.640] (==) AMDGPU(0): Using gamma correction (1.0, 1.0, 1.0)
[    10.640] (II) Loading sub module "ramdac"
[    10.640] (II) LoadModule: "ramdac"
[    10.640] (II) Module "ramdac" already built-in
[    10.640] (II) UnloadModule: "modesetting"
[    10.640] (II) Unloading modesetting
[    10.640] (II) UnloadModule: "fbdev"
[    10.640] (II) Unloading fbdev
[    10.640] (II) UnloadSubModule: "fbdevhw"
[    10.640] (II) Unloading fbdevhw
[    10.640] (II) UnloadModule: "vesa"
[    10.640] (II) Unloading vesa
[    10.641] (II) AMDGPU(0): [DRI2] Setup complete
[    10.641] (II) AMDGPU(0): [DRI2]   DRI driver: radeonsi
[    10.641] (II) AMDGPU(0): [DRI2]   VDPAU driver: radeonsi
[    10.691] (II) AMDGPU(0): Front buffer pitch: 5632 bytes
[    10.691] (II) AMDGPU(0): SYNC extension fences enabled
[    10.692] (II) AMDGPU(0): Present extension enabled
[    10.692] (==) AMDGPU(0): DRI3 enabled
[    10.692] (==) AMDGPU(0): Backing store enabled
[    10.692] (II) AMDGPU(0): Direct rendering enabled
[    10.711] (II) AMDGPU(0): Use GLAMOR acceleration.
[    10.711] (II) AMDGPU(0): Acceleration enabled
[    10.711] (==) AMDGPU(0): DPMS enabled
[    10.711] (==) AMDGPU(0): Silken mouse enabled
[    10.711] (II) AMDGPU(0): Set up textured video (glamor)
[    10.723] (II) Initializing extension Generic Event Extension
[    10.723] (II) Initializing extension SHAPE
[    10.723] (II) Initializing extension MIT-SHM
[    10.723] (II) Initializing extension XInputExtension
[    10.724] (II) Initializing extension XTEST
[    10.724] (II) Initializing extension BIG-REQUESTS
[    10.724] (II) Initializing extension SYNC
[    10.724] (II) Initializing extension XKEYBOARD
[    10.724] (II) Initializing extension XC-MISC
[    10.725] (II) Initializing extension SECURITY
[    10.725] (II) Initializing extension XFIXES
[    10.725] (II) Initializing extension RENDER
[    10.725] (II) Initializing extension RANDR
[    10.725] (II) Initializing extension COMPOSITE
[    10.725] (II) Initializing extension DAMAGE
[    10.725] (II) Initializing extension MIT-SCREEN-SAVER
[    10.725] (II) Initializing extension DOUBLE-BUFFER
[    10.726] (II) Initializing extension RECORD
[    10.726] (II) Initializing extension DPMS
[    10.726] (II) Initializing extension Present
[    10.726] (II) Initializing extension DRI3
[    10.726] (II) Initializing extension X-Resource
[    10.726] (II) Initializing extension XVideo
[    10.727] (II) Initializing extension XVideo-MotionCompensation
[    10.727] (II) Initializing extension SELinux
[    10.727] (II) SELinux: Disabled on system
[    10.727] (II) Initializing extension GLX
[    23.754] (II) AIGLX: Loaded and initialized radeonsi
[    23.754] (II) GLX: Initialized DRI2 GL provider for screen 0
[    23.754] (II) Initializing extension XFree86-VidModeExtension
[    23.755] (II) Initializing extension XFree86-DGA
[    23.755] (II) Initializing extension XFree86-DRI
[    23.755] (II) Initializing extension DRI2
[    23.766] (II) AMDGPU(0): Setting screen physical size to 361 x 203

由于问题再次出现，我什至无法从计算机进入睡眠状态恢复。有人可以帮我弄清楚发生了什么吗？