今天我打开桌面，迎接我的是丑陋的低分辨率显示屏。检查设置，现在只有 2 个可用选项：1024 x 768 或 800 x 600。
之前有大约 20 个选项，我使用的是 1920 x 一些。
我正在运行 POP!OS 20.04 LTS
我检查了 /var/log/apt/history.log 并发现以下内容：
Start-Date: 2021-03-28 09:43:04
Commandline: apt-get --allow-downgrades -y install pop-upgrade libpop-upgrade-gtk
Upgrade: libpop-upgrade-gtk:amd64 (0.1.1~1608137131~20.04~d3bfb98, 0.1.1~1616430952~20.04~7df32bb), pop-upgrade:amd64 (0.1.1~1608137131~20.04~d3bfb98, 0.1.1~1616430952~20.04~7df32bb)
End-Date: 2021-03-28 09:43:08
我已经尝试$ sudo apt-get --allow-downgrades --reinstall install pop-upgrade libpop-upgrade-gtk并重新启动，但没有帮助。
我也做了：
sudo apt clean
sudo apt update -m
sudo dpkg --configure -a
sudo apt install -f
sudo apt dist-upgrade
sudo apt autoremove --purge --remove --purge
诊断信息：
输出$ uname -a
Linux pop-os 5.8.0-7642-generic #47~1614007149~20.04~82fb226-Ubuntu SMP Tue Feb 23 02:56:27 UTC x86_64 x86_64 x86_64 GNU/Linux
输出$ sudo lshw -c video
*-display
description: VGA compatible controller
product: Intel Corporation
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 03
width: 64 bits
clock: 33MHz
capabilities: pciexpress msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:128 memory:b0000000-b0ffffff memory:a0000000-afffffff ioport:4000(size=64) memory:c0000-dffff
输出$ sudo lspci -nn | grep VGA
00:02.0 VGA compatible controller [0300]: Intel Corporation Device [8086:9bc8] (rev 03)
在/var/log/gpu-manager.log
log_file: /var/log/gpu-manager.log
last_boot_file: /var/lib/ubuntu-drivers-common/last_gfx_boot
new_boot_file: /var/lib/ubuntu-drivers-common/last_gfx_boot
can't access /run/u-d-c-nvidia-was-loaded file
can't access /opt/amdgpu-pro/bin/amdgpu-pro-px
Looking for nvidia modules in /lib/modules/5.8.0-7642-generic/updates/dkms
Looking for amdgpu modules in /lib/modules/5.8.0-7642-generic/updates/dkms
Is nvidia loaded? no
Was nvidia unloaded? no
Is nvidia blacklisted? no
Is intel loaded? yes
Is radeon loaded? no
Is radeon blacklisted? no
Is amdgpu loaded? no
Is amdgpu blacklisted? no
Is amdgpu versioned? no
Is amdgpu pro stack? no
Is nouveau loaded? no
Is nouveau blacklisted? no
Is nvidia kernel module available? no
Is amdgpu kernel module available? no
Vendor/Device Id: 8086:9bc8
BusID "PCI:0@0:2:0"
Is boot vga? yes
Skipping "/dev/dri/card0", driven by "i915"
Skipping "/dev/dri/card0", driven by "i915"
Skipping "/dev/dri/card0", driven by "i915"
Found "/dev/dri/card0", driven by "i915"
output 0:
card0-DP-1
Number of connected outputs for /dev/dri/card0: 1
Does it require offloading? yes
last cards number = 1
Has amd? no
Has intel? yes
Has nvidia? no
How many cards? 1
Has the system changed? No
Single card detected
Nothing to do
输出sudo systemctl status gdm
● gdm.service - GNOME Display Manager
Loaded: loaded (/lib/systemd/system/gdm.service; static; vendor preset: enab>
Active: active (running) since Sun 2021-03-28 13:15:49 PST; 21min ago
Process: 913 ExecStartPre=/usr/share/gdm/generate-config (code=exited, status>
Process: 926 ExecStartPre=/usr/lib/gdm3/gdm-wait-for-drm (code=exited, status>
Main PID: 927 (gdm3)
Tasks: 3 (limit: 9267)
Memory: 10.1M
CGroup: /system.slice/gdm.service
└─927 /usr/sbin/gdm3
Mar 28 13:15:49 pop-os systemd[1]: Starting GNOME Display Manager...
Mar 28 13:15:49 pop-os systemd[1]: Started GNOME Display Manager.
Mar 28 13:15:50 pop-os gdm-launch-environment][939]: pam_unix(gdm-launch-environm>
Mar 28 13:20:28 pop-os gdm-password][1370]: pam_unix(gdm-password:auth): Couldn't>
Mar 28 13:20:42 pop-os gdm-password][1370]: pam_unix(gdm-password:auth): Couldn't>
Mar 28 13:20:42 pop-os gdm-password][1370]: gkr-pam: unable to locate daemon cont>
Mar 28 13:20:42 pop-os gdm-password][1370]: gkr-pam: stashed password to try late>
Mar 28 13:20:42 pop-os gdm-password][1370]: pam_unix(gdm-password:session): sessi>
Mar 28 13:20:42 pop-os gdm-password][1370]: gkr-pam: gnome-keyring-daemon started>
dad@pop-os:~$ sudo systemctl status gdm
● gdm.service - GNOME Display Manager
Loaded: loaded (/lib/systemd/system/gdm.service; static; vendor preset: enabled)
Active: active (running) since Sun 2021-03-28 13:15:49 PST; 22min ago
Process: 913 ExecStartPre=/usr/share/gdm/generate-config (code=exited, status=0/SUCCESS)
Process: 926 ExecStartPre=/usr/lib/gdm3/gdm-wait-for-drm (code=exited, status=0/SUCCESS)
Main PID: 927 (gdm3)
Tasks: 3 (limit: 9267)
Memory: 10.1M
CGroup: /system.slice/gdm.service
└─927 /usr/sbin/gdm3
Mar 28 13:15:49 pop-os systemd[1]: Starting GNOME Display Manager...
Mar 28 13:15:49 pop-os systemd[1]: Started GNOME Display Manager.
Mar 28 13:15:50 pop-os gdm-launch-environment][939]: pam_unix(gdm-launch-environment:session): sessi>
Mar 28 13:20:28 pop-os gdm-password][1370]: pam_unix(gdm-password:auth): Couldn't open /etc/securett>
Mar 28 13:20:42 pop-os gdm-password][1370]: pam_unix(gdm-password:auth): Couldn't open /etc/securett>
Mar 28 13:20:42 pop-os gdm-password][1370]: gkr-pam: unable to locate daemon control file
Mar 28 13:20:42 pop-os gdm-password][1370]: gkr-pam: stashed password to try later in open session
Mar 28 13:20:42 pop-os gdm-password][1370]: pam_unix(gdm-password:session): session opened for user >
Mar 28 13:20:42 pop-os gdm-password][1370]: gkr-pam: gnome-keyring-daemon started properly and unloc>
lines 1-20/20 (END)
我没主意了。任何帮助，非常感谢。
更新
感谢“derpmatt”chat.pop-os.org谁给我指出了这个解决方案我现在已经解决了我的登录问题。但是，我仍在寻找一种方法来纠正其他用户的登录（无需以每个用户身份登录），并纠正登录屏幕，该屏幕仍然看起来像四岁孩子的登录！
我已尝试按照许多其他帖子中的建议将~/.config/monitors.xml文件复制到/var/lib/gdm3/.config并将所有者更改为gdm，但这对我的计算机没有任何影响。
提前致谢。