[zorowk]

快速熄屏唤醒时，Xorg 的低频模拟 vblank 可能延迟帧完成通知，导致先显示桌面再显示锁屏。

• 在 LightDM 的 Xorg 启动命令中加入 -fakescreenfps 30，将模拟刷新频率设为 30 Hz。

缩短模拟刷新计数对应的等待周期，缓解快速唤醒时锁屏显示迟到的问题。

PMS: BUG-378549

Summary by Sourcery

Bug Fixes:

• Set the Xorg fake screen refresh rate to 30 Hz to reduce delayed frame notifications during rapid screen wake-up and prevent the desktop from appearing before the lock screen.

[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: zorowk

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• debian/deepin/OWNERS

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[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

LightDM now starts Xorg with a 30 Hz fake screen refresh rate, shortening simulated vblank intervals to help ensure the lock screen appears before the desktop during rapid wake-up.

Sequence diagram for 30 Hz fake screen refresh during wake-up

sequenceDiagram
    participant LightDM
    participant Xorg
    participant LockScreen
    participant Desktop
    LightDM->>Xorg: start with -fakescreenfps 30
    Xorg-->>LockScreen: simulated vblank notifications at 30 Hz
    LockScreen->>Xorg: render lock screen
    Xorg-->>Desktop: frame completion notification
    Note over LockScreen,Desktop: Lock screen is displayed before the desktop

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File-Level Changes

Change	Details	Files
Configure Xorg’s simulated screen refresh rate to reduce lock-screen display latency during rapid screen-off wake-up.	Add the -fakescreenfps 30 option to the LightDM Xorg startup command. Set the fake vblank cadence to 30 Hz so frame-completion notifications arrive sooner and more consistently.	misc/lightdm.conf

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[deepin-ci-robot]

deepin pr auto review

🤖 AI 代码审查报告

总体评分： 100 分 (通过阈值: 70分)

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📊 总体评价

项目	结果
审查结论	代码审查通过
评分详情	本次提交在 misc/lightdm.conf 中为 Xorg 命令添加 -fakescreenfps 30 参数， 将假屏刷新率设置为 30 Hz。变更仅一行配置，语法正确，逻辑清晰， 无安全漏洞，无性能问题，代码质量良好。启发式扫描与 OCR 审查均未发现问题。

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🔍 详细分析

1. 语法逻辑 ✅

评价： 语法正确，逻辑清晰 ✅ 通过

潜在问题：
✅ 未发现明显问题

建议： 无

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2. 代码质量 ✅

评价： 代码结构清晰，注释完整 ✅ 通过

潜在问题：
✅ 未发现明显问题

建议： 无

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3. 代码性能 ✅

评价： 性能良好，资源使用合理 ✅ 通过

潜在问题：
✅ 未发现明显问题

建议： 无

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4. 代码安全 🔒

评价： 存在0个安全漏洞 ✅ 通过

🔐 发现 0 个安全漏洞

安全漏洞详情：
✅ 未发现安全漏洞

建议： 无

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💡 改进建议代码示例

# 当前配置已正确，无需修改 # misc/lightdm.conf [Seat:*] xserver-command=X -background none -fakescreenfps 30 greeter-session=lightdm-deepin-greeter user-session=deepin

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