我的安装过程卡在了Almost finished copying files。
为了达到这个目的，我主要遵循https://community.acer.com/en/discussion/comment/903305/#Comment_903305：
- 在我的戴尔电脑上，
dd将官方网站上的 ubuntu 20.04 iso 复制到 32GB 的 usb 驱动器中 - 在 Acer 上，禁用安全启动，将 SATA 模式切换为 AHCI，启用 F12BootMenu，禁用快速启动，保存并重新启动，进入 GRUB 菜单。
在 grub 菜单中，我尝试了正常安装和安全图形安装，但两者似乎都导致相同的结果。
我还尝试添加nomodesetGRUB 行并按C-x启动。它们与我在网上看到的不同，因为---末尾有：
linux /casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
我尝试在另一次重启nomodeset后添加splash，然后添加---，但没有任何变化。
我还尝试noacpi通过更改实时试用中的 grub 文件进行尝试，如XDG_RUNTIME_DIR 不属于我们 (uid 0)，但没有变化。
不连接 wifi、选择最小安装、不安装第三方软件似乎也没有任何效果。
它们都导致卡在Almost finished copying files，并出现类似这样的日志，来自cat /var/log/syslog：https://pastebin.com/xHdncmHK
在我的戴尔上设置本地 js 服务器将post数据放入文件并运行后，我可以共享命令输出wget -qO- 192.168.0.157:8000 --post-file=<file>。
$ lspci
00:00.0 Host bridge: Intel Corporation 10th Gen Core Processor Host Bridge/DRAM Registers (rev 02)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor PCIe Controller (x16) (rev 02)
00:02.0 VGA compatible controller: Intel Corporation UHD Graphics (rev 05)
00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 02)
00:08.0 System peripheral: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th/8th Gen Core Processor Gaussian Mixture Model
00:12.0 Signal processing controller: Intel Corporation Comet Lake PCH Thermal Controller
00:14.0 USB controller: Intel Corporation Comet Lake USB 3.1 xHCI Host Controller
00:14.2 RAM memory: Intel Corporation Comet Lake PCH Shared SRAM
00:14.3 Network controller: Intel Corporation Wi-Fi 6 AX201
00:15.0 Serial bus controller [0c80]: Intel Corporation Comet Lake PCH Serial IO I2C Controller #0
00:15.1 Serial bus controller [0c80]: Intel Corporation Comet Lake PCH Serial IO I2C Controller #1
00:16.0 Communication controller: Intel Corporation Comet Lake HECI Controller
00:17.0 SATA controller: Intel Corporation Device 06d3
00:1b.0 PCI bridge: Intel Corporation Comet Lake PCI Express Root Port #21 (rev f0)
00:1d.0 PCI bridge: Intel Corporation Device 06b5 (rev f0)
00:1f.0 ISA bridge: Intel Corporation Comet Lake LPC Controller
00:1f.3 Audio device: Intel Corporation Comet Lake PCH cAVS
00:1f.4 SMBus: Intel Corporation Comet Lake PCH SMBus Controller
00:1f.5 Serial bus controller [0c80]: Intel Corporation Comet Lake PCH SPI Controller
01:00.0 VGA compatible controller: NVIDIA Corporation TU106 [GeForce RTX 2060] (rev a1)
01:00.1 Audio device: NVIDIA Corporation TU106 High Definition Audio Controller (rev a1)
01:00.2 USB controller: NVIDIA Corporation TU106 USB 3.1 Host Controller (rev a1)
01:00.3 Serial bus controller [0c80]: NVIDIA Corporation TU106 USB Type-C UCSI Controller (rev a1)
06:00.0 Non-Volatile memory controller: Sandisk Corp Device 5009 (rev 01)
07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. Device 2600 (rev 21)
$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop0 7:0 0 2G 0 loop /rofs
loop1 7:1 0 29.9M 1 loop /snap/snapd/8542
loop2 7:2 0 55M 1 loop /snap/core18/1880
loop3 7:3 0 255.6M 1 loop /snap/gnome-3-34-1804/36
loop4 7:4 0 62.1M 1 loop /snap/gtk-common-themes/1506
loop5 7:5 0 49.8M 1 loop /snap/snap-store/467
sda 8:0 1 28.9G 0 disk
├─sda1 8:1 1 512M 0 part
└─sda2 8:2 1 28.4G 0 part /target
nvme0n1 259:0 0 953.9G 0 disk
├─nvme0n1p1 259:1 0 100M 0 part /target/boot/efi
├─nvme0n1p2 259:2 0 16M 0 part
├─nvme0n1p3 259:3 0 952.8G 0 part /cdrom
└─nvme0n1p4 259:4 0 1G 0 part
这个有点令人费解，因为我没有选择zfs作为我的文件系统
$ service --status-all
[ + ] acpid
[ - ] alsa-utils
[ - ] anacron
[ - ] apparmor
[ + ] apport
[ + ] avahi-daemon
[ + ] bluetooth
[ - ] console-setup.sh
[ + ] cron
[ - ] cryptdisks
[ - ] cryptdisks-early
[ + ] cups
[ + ] cups-browsed
[ + ] dbus
[ + ] gdm3
[ + ] grub-common
[ - ] hwclock.sh
[ + ] irqbalance
[ + ] kerneloops
[ - ] keyboard-setup.sh
[ + ] kmod
[ - ] lvm2
[ - ] lvm2-lvmpolld
[ + ] network-manager
[ + ] openvpn
[ - ] plymouth
[ - ] plymouth-log
[ - ] pppd-dns
[ + ] procps
[ - ] pulseaudio-enable-autospawn
[ - ] rsync
[ + ] rsyslog
[ - ] saned
[ - ] speech-dispatcher
[ - ] spice-vdagent
[ + ] udev
[ + ] ufw
[ + ] unattended-upgrades
[ - ] uuidd
[ + ] whoopsie
[ - ] x11-common
[ - ] zfs-import
[ + ] zfs-mount
[ + ] zfs-share
[ + ] zfs-zed
事实上，我甚至不确定我的主分区最终在哪里，它应该是一个 1TB 的 SSD：
$ df -Th
Filesystem Type Size Used Avail Use% Mounted on
udev devtmpfs 7.7G 4.0K 7.7G 1% /dev
tmpfs tmpfs 1.6G 1.8M 1.6G 1% /run
/dev/nvme0n1p3 fuseblk 953G 48G 906G 6% /cdrom
/dev/loop0 squashfs 2.0G 2.0G 0 100% /rofs
/cow overlay 7.8G 81M 7.7G 2% /
tmpfs tmpfs 7.8G 0 7.8G 0% /dev/shm
tmpfs tmpfs 5.0M 8.0K 5.0M 1% /run/lock
tmpfs tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup
tmpfs tmpfs 7.8G 12K 7.8G 1% /tmp
tmpfs tmpfs 1.6G 60K 1.6G 1% /run/user/999
/dev/loop1 squashfs 30M 30M 0 100% /snap/snapd/8542
/dev/loop2 squashfs 55M 55M 0 100% /snap/core18/1880
/dev/loop3 squashfs 256M 256M 0 100% /snap/gnome-3-34-1804/36
/dev/loop4 squashfs 63M 63M 0 100% /snap/gtk-common-themes/1506
/dev/loop5 squashfs 50M 50M 0 100% /snap/snap-store/467
/dev/sda2 ext4 28G 5.5G 21G 21% /target
/dev/nvme0n1p1 vfat 96M 52M 45M 54% /target/boot/efi