Ubuntu 20.04安装后紫屏带黑纹问题求助

Hey Alex, sorry to hear you're stuck with this frustrating purple screen issue after installing Ubuntu 20.04 on your rack workstations—let's walk through some targeted fixes that might get things back on track:

• 临时禁用开源驱动启动系统
  This is usually the first go-to for display glitches post-install. When your system boots to the GRUB menu (hold Shift during startup if it doesn't show up), select the Ubuntu entry and press e to edit the boot parameters. Find the line starting with linux, add nomodeset right after quiet splash, then press F10 to boot. If this gets you into the desktop successfully, the problem is likely a driver compatibility conflict.

  Once in the system, install the proper closed-source drivers:

  • For NVIDIA GPUs: Open "Software & Updates", switch to the "Additional Drivers" tab, pick the recommended NVIDIA proprietary driver, apply changes, and reboot.
  • For AMD GPUs: Either install the amdgpu-pro package (if your card supports it) or run a full system upgrade to get the latest kernel, which often improves AMD hardware support.

• 检查安装介质完整性
  Even if the CD worked before, optical media can get scratched or degrade over time, leading to corrupted installs. Try creating a new USB installation drive instead (use tools like Rufus or the dd command on Linux), and make sure you verify the Ubuntu 20.04 ISO's checksum before writing it to the drive to rule out bad installation files.

• 更新系统内核版本
  Ubuntu 20.04's default kernel might lack proper support for newer rack workstation hardware. If you can boot into the system (via nomodeset), open a terminal and run these commands to install the latest hardware-enablement kernel:

  sudo apt update && sudo apt upgrade -y
  sudo apt install linux-generic-hwe-20.04
  

  Reboot after installation and check if the display issue is resolved.

• 调整BIOS/UEFI相关设置
  Rack workstations often have strict firmware settings that can interfere with Linux display drivers:

  • 尝试禁用Secure Boot（它可能会阻止闭源驱动正常加载）。
  • 检查显示输出模式——在UEFI和Legacy启动模式之间切换，看看是否能解决问题。
  • 如果你使用独立显卡，确保集成显卡已被禁用（反之亦然，取决于你的硬件配置）。

• 尝试文本模式安装
  有时图形化安装器会在安装过程中引入驱动冲突。从安装介质启动后，在GRUB菜单中选择"Install Ubuntu in text mode"，通过命令行完成安装，之后再进入系统安装GPU驱动。

如果这些方法都没用，能不能补充一些硬件细节？如果能进入终端，运行lshw -C display和uname -r命令，分享你的具体GPU型号和内核版本——这会帮助我们进一步排查问题。

备注：内容来源于stack exchange，提问作者Alex Apger