我正在运行 Ubuntu 20.04，想要一个安装了另一个 Ubuntu 的 VM 来尝试一些东西。
我按照他们网站上的描述安装了 VirtualBox（添加了 ppa），然后按照这个帖子如何安装它。
当我尝试启动它时，出现一个弹出窗口，内容如下：
所以...我尝试搜索论坛，但是喜欢这个帖子他们没有详细描述他们的问题，最后一篇帖子似乎不是我的问题。我有 16 GB 的 RAM。
但是，当我查看日志时，发现读取 ISO 和 VM 磁盘存在问题：
00:00:00.794924 VirtualBox VM 6.1.18 r142142 linux.amd64 (Jan 7 2021 17:36:17) release log
00:00:00.794926 Log opened 2021-02-27T10:46:27.374821000Z
00:00:00.794926 Build Type: release
00:00:00.794929 OS Product: Linux
00:00:00.794930 OS Release: 5.8.0-44-generic
00:00:00.794931 OS Version: #50~20.04.1-Ubuntu SMP Wed Feb 10 21:07:30 UTC 2021
00:00:00.794947 DMI Product Name: 20KFCTO1WW
00:00:00.794952 DMI Product Version: ThinkPad X280
00:00:00.794957 Firmware type: UEFI
00:00:00.795549 Secure Boot: Enabled
00:00:00.795583 Host RAM: 15760MB (15.3GB) total, 10827MB (10.5GB) available
00:00:00.795586 Executable: /usr/lib/virtualbox/VirtualBoxVM
00:00:00.795586 Process ID: 27519
00:00:00.795587 Package type: LINUX_64BITS_UBUNTU_19_10
00:00:00.806297 Installed Extension Packs:
00:00:00.806323 None installed!
00:00:00.807016 Console: Machine state changed to 'Starting'
00:00:00.807171 Qt version: 5.12.8
00:00:00.807192 X11 Window Manager code: 2
00:00:00.810712 SUP: seg #0: R 0x00000000 LB 0x0004c000
00:00:00.810778 SUP: seg #1: R X 0x0004c000 LB 0x00114000
00:00:00.810823 SUP: seg #2: R 0x00160000 LB 0x0005f000
00:00:00.810831 SUP: seg #3: RW 0x001bf000 LB 0x00035060
00:00:00.812782 SUP: Loaded VMMR0.r0 (/usr/lib/virtualbox/VMMR0.r0) at 0xXXXXXXXXXXXXXXXX - ModuleInit at XXXXXXXXXXXXXXXX and ModuleTerm at XXXXXXXXXXXXXXXX
00:00:00.812819 SUP: VMMR0EntryEx located at XXXXXXXXXXXXXXXX and VMMR0EntryFast at XXXXXXXXXXXXXXXX
00:00:00.814081 Guest OS type: 'Ubuntu_64'
00:00:00.815672 fHMForced=true - No raw-mode support in this build!
00:00:00.819263 GUI: UIMediumEnumerator: Medium-enumeration finished!
00:00:00.820811 X Server details: vendor: The X.Org Foundation, release: 12009000, protocol version: 11.0, display string: :0
00:00:00.820842 Using XKB for keycode to scan code conversion
00:00:00.821575 File system of '/home/joachim/Downloads/ubuntu-20.04.2.0-desktop-amd64.iso' (DVD) is unknown
00:00:00.823308 GUI: UIDesktopWidgetWatchdog::sltHandleHostScreenAvailableGeometryCalculated: Screen 0 work area is actually resized to: 48x27 x 1872x1053
00:00:00.826613 File system of '/home/joachim/VirtualBox VMs/Ubuntu Eoan/Snapshots' (snapshots) is unknown
00:00:00.826651 File system of '/home/joachim/VirtualBox VMs/Ubuntu Eoan/Ubuntu Eoan.vdi' is unknown
00:00:00.838188 Shared Clipboard: Service loaded
00:00:00.838223 Shared Clipboard: Mode: Off
00:00:00.838267 Shared Clipboard: Service running in normal mode
00:00:00.838949 Drag and drop service loaded
00:00:00.838972 Drag and drop mode: Off
00:00:00.840708 ************************* CFGM dump *************************
类似这样的行：
00:00:00.826651 File system of '/home/joachim/VirtualBox VMs/Ubuntu Eoan/Ubuntu Eoan.vdi' is unknown
我尝试安装扩展包，但没有成功。
我的主机系统使用 ZFS。这有关系吗？
还有谁遇到过这种情况并且以某种方式解决了吗？
答案1
所以，这原来是一个 GUI 问题。在日志中发现一行包含以下内容
Argument aWidth is invalid (must be aWidth != 0 && aWidth <= 32767)
然后跑了
vboxmanage setextradata "Eoan" "GUI/LastNormalWindowPosition"
在终端（Eoan 是 VM 实例的名称）中，重新打开 VirtualBox 并且一切都顺利启动。