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X.Org Server Error: No Screens Found
2025/08/23·StepFun can make mistakes, check important info.
X.Org X Server 1.21.1.4 X Protocol Version 11, Revision 0 Current Operating System: Linux it-09.host.platform.basemind.com 5.15.0-126-generic #136-Ubuntu SMP Wed Nov 6 10:38:22 UTC 2024 x86_64 Kernel command line: BOOT_IMAGE=/vmlinuz-5.15.0-126-generic root=UUID=7aa5e07b-4e9d-4ed9-ba55-7d5ef52eb823 ro crashkernel=256M spectre_v2=retpoline intel_iommu=on iommu=pt rootflags=prjquota systemd.unified_cgroup_hierarchy=false crashkernel=2048M xorg-server 2:21.1.4-2ubuntu1.7~22.04.15 (For technical support please see http://www.ubuntu.com/support) Current version of pixman: 0.40.0 Before reporting problems, check http://wiki.x.org to make sure that you have the latest version. Markers: (--) probed, (**) from config file, (==) default setting, (++) from command line, (!!) notice, (II) informational, (WW) warning, (EE) error, (NI) not implemented, (??) unknown. (==) Log file: "/home/infra/.local/share/xorg/Xorg.1.log", Time: Sat Aug 23 18:08:36 2025 (==) Using system config directory "/usr/share/X11/xorg.conf.d" xf86EnableIO: failed to enable I/O ports 0000-03ff (Operation not permitted) vesa: Ignoring device with a bound kernel driver (EE) Fatal server error: (EE) no screens found(EE) (EE) Please consult the The X.Org Foundation support at http://wiki.x.org for help. (EE) Please also check the log file at "/home/infra/.local/share/xorg/Xorg.1.log" for additional information. (EE) (EE) Server terminated with error (1). Closing log file. xinit: giving up xinit: unable to connect to X server: Network is unreachable xinit: server error
Reason
附件解析
思考过程

从错误日志的关键信息 vesa: Ignoring device with a bound kernel driver 和 no screens found 可知，显卡驱动被内核模块占用，导致Xorg无法访问显示设备。以下是针对性解决方案：

从日志的核心错误 vesa: Ignoring device with a bound kernel driver 和 no screens found 可知，问题根源是显卡驱动被内核模块占用，导致Xorg无法访问显示设备。以下是分步解决方案：

🔍 问题本质：内核驱动绑定显卡

Linux内核的KMS（Kernel Mode Setting）驱动（如i915/amdgpu/nouveau）会提前绑定显卡，Xorg的vesa等用户态驱动因“设备已被占用”而无法加载，最终导致no screens found。

✅ 解决方案1：释放内核驱动对显卡的占用

通过内核模块黑名单禁用冲突驱动，让Xorg用户态驱动接管显卡：

bash

驱动名对应表：

  • Intel集成显卡 → i915
  • AMD显卡 → amdgpu
  • NVIDIA开源驱动 → nouveau

✅ 解决方案2：强制Xorg使用内核驱动（KMS模式）

若需保留内核驱动，需让Xorg通过modesetting驱动直接对接KMS：

bash

✅ 解决方案3：临时禁用KMS驱动（调试用）

风险提示：禁用KMS可能导致显示性能下降，仅用于临时测试！

bash

🔍 额外检查项（若仍失败）

  1. 验证显卡硬件ID：
    通过lspci -nnk查看显卡设备ID，确认驱动匹配（如Intel显卡应有VGA compatible controller: Intel Corporation ...）。

  2. 检查内核启动参数：
    编辑/etc/default/grub，添加nomodeset参数禁用KMS（临时方案）：

    bash

  3. 安装专有驱动（NVIDIA为例）：
    若为NVIDIA显卡且需高性能，安装闭源驱动：

    bash

📌 最终验证流程

bash

⚠️ 若日志仍报no screens found，需进一步检查硬件虚拟化限制（如KVM权限）或文件系统ACL。按上述步骤操作后，Xorg应能突破内核驱动占用，成功初始化显示服务。