验证：补充2K刷新率与单显示器验收

docs/2k60-validation-20261103.md

@@ -0,0 +1,55 @@
+# GPU修复后刷新率与鼠标画面优化验收（2026-11-03）
+
+## 结论
+
+Windows虚拟屏已调整为2560×1440、60Hz，登录脚本已备份并更新；客户端默认已设为45FPS，并通过正常选择桌面入口重连。当前盒子的Xorg/EGL路径在请求60FPS时实际只能渲染约46FPS，因此不宣称稳定2K60。45FPS短测实际44.22FPS，持续测试43.14FPS；相对30FPS基线29.83FPS提高约45%～48%，排队约1.3～1.6ms。
+
+## GPU复核
+
+本轮实际查询NVIDIA错误码0，驱动582.78，vBIOS 84.04.2b.00.13。动态串流期间Sunshine实际创建h264_nvenc，NVIDIA有1个编码会话，检查时编码引擎约24%。运维报告的重启测试作为其提供的验收记录，本轮未自行重启VM、宿主或GPU，也未修改直通和ROM配置。
+
+## 同一修正测试源对照
+
+修正后的Windows测试窗口实测约59FPS，避免了原WinForms定时器将源限制到约32FPS的问题。所有测试保持2560×1440、H.264、30Mbps、RKMPP硬解；默认客户端为已有两个输入补丁的版本，第三补丁调度未启用。除同步实验外，均关闭VSync与帧步调。
+
+| 档位 | 接收/渲染FPS | 主机处理平均 | 解码平均 | 帧队列平均 | 客户端队列丢弃指标 |
+| --- | --- | --- | --- | --- | --- |
+| VDD30 / 客户端30 | 29.95 / 29.83 | 7.5ms | 6.81ms | 0.60ms | 0.41% |
+| VDD60 / 客户端60、最新帧队列 | 58.82 / 46.11 | 7.5ms | 7.37ms | 7.54ms | 21.61% |
+| VDD60 / 客户端60、原队列 | 58.81 / 46.10 | 7.6ms | 7.13ms | 36.13ms | 10.28% |
+| VDD60 / 客户端60、精确尺寸nearest实验 | 58.20 / 42.01 | 7.5ms | 6.94ms | 7.66ms | 27.77% |
+| VDD60 / 客户端60、VSync开/帧步调关 | 57.88 / 24.39 | 7.5ms | 7.26ms | 8.12ms | 57.80% |
+| VDD60 / 客户端45、最新帧队列 | 44.84 / 44.22 | 7.6ms | 8.54ms | 1.30ms | 1.38% |
+| VDD60 / 客户端45、持续测试 | 43.98 / 43.14 | 7.6ms | 7.32ms | 1.55ms | 1.91% |
+
+上表“客户端队列丢弃指标”来自上游标成`Frames dropped due to network jitter`的统计，但实际字段是`pacerDroppedFrames`，本项目最新帧队列也计入其中。不能把它全部归因于网络，原队列溢出统计也并不完整；应结合接收/解码/渲染FPS及帧队列时间评估。上述会话真正的网络丢帧字段均为0%，网络延迟约2～7ms；这些是现场顺序测试，不是严格实验室基准。
+
+60FPS会话采样盒子图形核心约89%～95%负载、800MHz；DDR频率已在786MHz最高公布档位，MATE合成器关闭。测试温度约62～65℃，没有通过提高频率/电压或更改CPU/GPU调速器来制造结果。原队列没有提高帧率却增加排队，nearest采样和VSync实验均未显示收益，未部署。
+
+nearest实验保留在`terminal/moonlight/experiments/0004-vdi-egl-exact-size-sampling.patch`供复查，已从盒子正常源码撤回，不进入默认构建流程。正常二进制SHA256仍为`35de7b1a4ade583823b23b5f2e012307f6d0a3848c8eb97bd6d4de9660afa00f`。
+
+## 配置和回退
+
+- Windows实际活动VDD编号已变为DISPLAY3，工具动态查找，未写死设备号。旧DISPLAY2备份不能直接作为新设备的恢复依据，因此探测器增加`--backup-tag`区分验收批次。
+- `tools/set-2k-display.ps1`默认60Hz，支持`-RefreshRate 30`回退；已更新原VDISet2KDisplay登录任务使用的脚本，未修改任务动作或用户。
+- Windows部署前原脚本和任务XML备份：`C:\ProgramData\VDI\backups\display-refresh-20261103-142920`。部署工具按本次新生成的结果日志和任务退出码确认成功，随后独立Query确认60Hz。本轮没有重启验证登录触发。
+- `tools/run-mouse-display-probe.py Apply --hz 30 --backup-tag nvenc-20261103`可临时恢复30Hz；要保持30Hz应恢复原登录脚本，或将登录任务脚本参数设为`-RefreshRate 30`。
+- `tools/set-terminal-fps.py --fps 45 --apply`只更改盒子Windows桌面票据FPS，自动备份和原子写入，不更改其他桌面；回退用`--fps 30 --apply`。
+
+部署工具前两次因Windows任务调度器LastRunTime与墙上时钟不同步而误判成功任务为失败，已自动恢复旧脚本；随后改为新结果日志证明执行新鲜度，部署成功。受配置切换影响的`nvenc45-sustained`不纳入持续测试结论，重新执行`nvenc45-sustained-final`。
+
+## 持续测试和现场收尾
+
+`nvenc45-sustained-final`在视频就绪后注入20秒鼠标移动和32次点击，再持续120秒，正常退出。接收43.98/渲染43.14FPS，主机平均7.6ms、解码7.32ms、排队1.55ms、呈现1.55ms，实际网络丢帧0%。这是约两分半钟的动态会话结果，不是长期稳定性保证。
+
+三组Windows点击记录共256次左右交替点击，脚本校验全部符合预期，包含被排除的持续性能试验中的32次；点击正确性可核验，但其帧率数据不纳入持续性能结论。修正测试源在保存的状态中约59.4～59.8FPS，足够进行本轮对照。
+
+已执行`set-terminal-fps.py --fps 45 --apply`，原30帧票据备份于盒子`~/vdi-terminal/backups/fps-20261103-143333-297521/desktops.json`。只改变Windows卡片FPS，其余桌面、分辨率和编码配置保持原值。
+
+已停止并删除VDIInputLatencyBench临时任务；最终Windows查询确认`benchmark_task_present=False`。通过正常kiosk页面点击Windows连接，实际新进程PID31694带`--resolution 2560x1440 --fps 45`，RKMPP/DRM PRIME/EGL路径正常。再次查询错误码0、NVENC会话1、编码占用18%，Sunshine本次实际创建h264_nvenc。显示守护active，正常客户端二进制未换成实验版本。
+
+证据目录：`docs/evidence/2k60-20261103/`，包含逐会话日志、点击记录、最终GPU/编码查询和页面截图。实际拖窗与鼠标的主观体验仍需用户现场确认；本轮自动点击和统计不能代替物理输入到屏幕测量。
+
+## 后续边界
+
+独立光标尚未实现，仍保留单个Windows远程白色光标。下一阶段要进一步达到稳定2K60，需要验证更低开销的显示路径及正式Weston/Wayland架构，或评估终端硬件；当前不能通过提高FPS参数或安装所谓流畅插件绕过呈现瓶颈。独立光标双方协议与单光标交接设计见`docs/independent-cursor-design-20261103.md`。本轮未测量物理输入到屏幕的P50/P95，不能称零延迟。

docs/evidence/2k60-20261103/clicks-first-three.txt

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docs/evidence/2k60-20261103/clicks-second-series-after45.txt

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docs/evidence/2k60-20261103/clicks-second-series-before45.txt

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docs/evidence/2k60-20261103/clicks-sustained.txt

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docs/evidence/2k60-20261103/final-host.txt

@@ -0,0 +1,11 @@
+{"Name":"NVIDIA GeForce GTX 965M","ConfigManagerErrorCode":0}␍
+NVIDIA GeForce GTX 965M, 84.04.2b.00.13, 1, 18 %␍
+␍
+Capture size       : 2560x1440␍
+[2026-11-03 14:34:22.850]: Info: Requested frame rate [45fps]␍
+[2026-11-03 14:34:22.851]: Info: Creating encoder [h264_nvenc]␍
+2026-11-03T14:29:21.7186993+08:00 device=\\.\DISPLAY3 result=0 mode=2560x1440@60␍
+benchmark_task_present=False␍
+␍
+␍
+

docs/evidence/single-display-20261103/after-health.txt

@@ -0,0 +1,19 @@
+Stopped scoped encoder-session monitor␍
+[{"Name":"Microsoft Basic Display Driver","ConfigManagerErrorCode":0},{"Name":"Virtual Display Driver","ConfigManagerErrorCode":0},{"Name":"NVIDIA GeForce GTX 965M","ConfigManagerErrorCode":0},{"Name":"Microsoft Basic Display Adapter","ConfigManagerErrorCode":0}]␍
+NVIDIA GeForce GTX 965M, 582.78, 10 %␍
+␍
+[2026-11-03 16:57:40.500]: Error: Couldn't get default audio endpoint [0x80070490]␍
+[2026-11-03 16:57:40.500]: Error: Unable to initialize audio capture. The stream will not have audio.␍
+Capture size       : 2560x1440␍
+[2026-11-03 16:57:41.165]: Info: Desktop resolution [2560x1440]␍
+[2026-11-03 16:57:41.165]: Info: Display refresh rate [60Hz]␍
+[2026-11-03 16:57:41.166]: Info: Creating encoder [h264_nvenc]␍
+Capture size       : 2560x1440␍
+[2026-11-03 17:14:13.305]: Info: Desktop resolution [2560x1440]␍
+[2026-11-03 17:14:13.306]: Info: Display refresh rate [60Hz]␍
+[2026-11-03 17:14:13.308]: Info: Creating encoder [h264_nvenc]␍
+probe_task_present=False␍
+backup_exists=True␍
+␍
+␍
+

docs/evidence/single-display-20261103/after-query.txt

@@ -0,0 +1,7 @@
+[{"width":0,"height":0,"description":"Microsoft Basic Display Adapter","primary":false,"active":false,"y":0,"hz":0,"device":"\\\\.\\DISPLAY1","x":0},{"width":0,"height":0,"description":"NVIDIA GeForce GTX 965M","primary":false,"active":false,"y":0,"hz":0,"device":"\\\\.\\DISPLAY2","x":0},{"width":2560,"height":1440,"description":"Virtual Display Driver","primary":true,"active":true,"y":0,"hz":60,"device":"\\\\.\\DISPLAY4","x":0}]
+
+
+
+task_result=0
+
+

docs/evidence/single-display-20261103/after-terminal.txt

@@ -0,0 +1,12 @@
+Screen 0: minimum 320 x 200, current 2560 x 1440, maximum 16384 x 16384
+HDMI-1 connected primary 2560x1440+0+0 (normal left inverted right x axis y axis) 597mm x 336mm
+   1920x1440     75.00  
+   2048x1152     60.00  
+   1920x1080    100.00    60.00    60.00    50.00    59.94  
+   1920x1080i    60.00    50.00    59.94  
+   1600x1200     60.00  
+   1680x1050     59.88  
+   1600x900      60.00  
+   1280x1024     60.02  
+  46934 /home/armbian/vdi-build/rkmpp-experiment/build/moonlight/app/moonlight stream 192.168.1.70 Desktop --resolution 2560x1440 --fps 45 --bitrate 30000 --display-mode fullscreen --video-codec H.264 --video-decoder hardware --absolute-mouse --keep-awake --no-vsync --no-frame-pacing --audio-on-host
+active

docs/evidence/single-display-20261103/apply.txt

@@ -0,0 +1,7 @@
+[{"width":0,"height":0,"description":"Microsoft Basic Display Adapter","primary":false,"active":false,"y":0,"hz":0,"device":"\\\\.\\DISPLAY1","x":0},{"width":0,"height":0,"description":"NVIDIA GeForce GTX 965M","primary":false,"active":false,"y":0,"hz":0,"device":"\\\\.\\DISPLAY2","x":0},{"width":2560,"height":1440,"description":"Virtual Display Driver","primary":true,"active":true,"y":0,"hz":60,"device":"\\\\.\\DISPLAY4","x":0}]
+
+
+
+task_result=0
+
+

docs/evidence/single-display-20261103/before.txt

@@ -0,0 +1,7 @@
+[{"width":2560,"height":1440,"description":"Microsoft Basic Display Adapter","primary":false,"active":true,"y":1440,"hz":64,"device":"\\\\.\\DISPLAY1","x":-1024},{"width":0,"height":0,"description":"NVIDIA GeForce GTX 965M","primary":false,"active":false,"y":0,"hz":0,"device":"\\\\.\\DISPLAY2","x":0},{"width":2560,"height":1440,"description":"Virtual Display Driver","primary":true,"active":true,"y":0,"hz":60,"device":"\\\\.\\DISPLAY4","x":0}]
+
+
+
+task_result=0
+
+

docs/single-display-20261103.md

@@ -0,0 +1,35 @@
+# Windows仅保留2K主屏（2026-11-03）
+
+用户条件：只有在不影响当前2K屏幕使用时才调整。已完成并读回：Windows仅一个活动桌面输出，保留Virtual Display Driver主屏2560×1440@60，盒子原Moonlight进程46934继续2K45/RKMPP/EGL，截图正常。GTX965M错误码0，Sunshine布局变化后仍创建h264_nvenc，最终编码占用10%。没有重启Windows/盒子、禁用显卡设备、卸载驱动或修改PVE/GPU直通。
+
+## 调整前后
+
+| 输出 | 原布局 | 现布局 |
+| --- | --- | --- |
+| DISPLAY4 / Virtual Display Driver | 主屏，2560×1440@60，坐标0,0 | 保留原模式和主屏身份，唯一活动输出 |
+| DISPLAY1 / Microsoft Basic Display Adapter | 扩展屏，2560×1440@64，坐标-1024,1440 | 从Windows桌面布局停用 |
+| DISPLAY2 / NVIDIA GTX965M直接输出 | 原本未激活 | 保持未激活；GPU本身仍正常用于硬件编码 |
+
+这里的“停用”仅指显示输出不参与Windows扩展桌面。设备管理器仍保留显示适配器，Windows设置也可能列出未连接的输出，不能将此操作说成卸载了多余显卡或移除了所有显示设备条目。
+
+本轮VDD编号已是DISPLAY4，早先DISPLAY3记录不能用于写死设备号。工具按唯一活动VDD动态选择，并在修改前强制核对它已是2560×1440@60主屏，不满足条件不修改。
+
+## 实现与验证
+
+新增`tools/set-single-vdi-display.ps1`，Query只查询；Apply先保存设备身份、模式、主屏、布局为XML，使用ChangeDisplaySettingsEx逐项暂存，最后一次提交停用其他活动输出。申请为当前用户保存布局；不添加持续守护或额外登录任务。读回若不是唯一VDD主屏或模式改变，立即尝试恢复本次原布局。已有备份拒绝覆盖。
+
+新增`tools/run-single-vdi-display.py`，通过已有VM100代理，在当前已登录用户会话运行一次性任务。任务已删除，最终`probe_task_present=False`。初次Query编译因缺少System.Xml引用失败，未执行显示修改；补齐引用后查询、应用、独立再次查询均成功。
+
+当前状态已经验证；未通过重启/重新登录检验持久性，以避免中断用户使用。原2K登录脚本仍动态选择VDD，未改分辨率策略。盒子原配置、显示守护和串流参数未修改。
+
+复核时误使用了会持续运行的`nvidia-smi encodersessions`，读取超时后已按进程及父命令精确停止本次监视子进程，再以一次性查询确认GPU健康；没有终止Sunshine或用户应用。Sunshine日志中的16:57音频端点错误早于本次显示调整，不是本次产生的新故障。
+
+## 回退和证据
+
+Windows原布局备份：`C:\ProgramData\VDI\single-display-20261103\before.xml`。
+
+如需恢复，使用`python tools/run-single-vdi-display.py Restore`。恢复前核对显示设备名称、ID和注册表Key，身份变更时拒绝套用旧布局；本轮没有为演示回退再次打断当前单屏状态。
+
+证据目录`docs/evidence/single-display-20261103/`包含before、apply、独立after-query、显卡/编码健康查询及实际2560×1440桌面截图。
+
+API依据：[Microsoft ChangeDisplaySettingsEx](https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-changedisplaysettingsexw)。

terminal/moonlight/experiments/0004-vdi-egl-exact-size-sampling.patch

@@ -0,0 +1,49 @@
+--- a/app/streaming/video/ffmpeg-renderers/eglvid.h
++++ b/app/streaming/video/ffmpeg-renderers/eglvid.h
+@@ -57,6 +57,8 @@
+     int m_GlesMajorVersion;
+     int m_GlesMinorVersion;
+     bool m_HasExtUnpackSubimage;
++    bool m_VdiNearestOneToOne;
++    int m_VdiTextureFilter;
+ 
+ #define NV12_PARAM_YUVMAT 0
+ #define NV12_PARAM_OFFSET 1
+--- a/app/streaming/video/ffmpeg-renderers/eglvid.cpp
++++ b/app/streaming/video/ffmpeg-renderers/eglvid.cpp
+@@ -75,7 +75,9 @@
+         m_eglClientWaitSync(nullptr),
+         m_GlesMajorVersion(0),
+         m_GlesMinorVersion(0),
+-        m_HasExtUnpackSubimage(false)
++        m_HasExtUnpackSubimage(false),
++        m_VdiNearestOneToOne(qEnvironmentVariableIntValue("VDI_EGL_NEAREST_1TO1") == 1),
++        m_VdiTextureFilter(GL_LINEAR)
+ {
+     SDL_assert(backendRenderer);
+     SDL_assert(backendRenderer->canExportEGL());
+@@ -812,6 +814,24 @@
+     dst.w = drawableWidth;
+     dst.h = drawableHeight;
+     StreamUtils::scaleSourceToDestinationSurface(&src, &dst);
++
++    // At exact pixel size no resampling is needed. Keep linear filtering for
++    // scaled video and all other backends. Never change overlay filtering.
++    if (m_VdiNearestOneToOne && m_EGLImagePixelFormat == AV_PIX_FMT_DRM_PRIME) {
++        const int filter = dst.w == frame->width && dst.h == frame->height ? GL_NEAREST : GL_LINEAR;
++        if (filter != m_VdiTextureFilter) {
++            for (ssize_t i = 0; i < plane_count; ++i) {
++                glActiveTexture(GL_TEXTURE0 + i);
++                glBindTexture(GL_TEXTURE_EXTERNAL_OES, m_Textures[i]);
++                glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MIN_FILTER, filter);
++                glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MAG_FILTER, filter);
++            }
++            m_VdiTextureFilter = filter;
++            EGL_LOG(Info, "VDI video texture filter: %s (%dx%d -> %dx%d)",
++                    filter == GL_NEAREST ? "nearest" : "linear",
++                    frame->width, frame->height, dst.w, dst.h);
++        }
++    }
+     glViewport(dst.x, dst.y, dst.w, dst.h);
+ 
+     glUseProgram(m_ShaderProgram);

tools/deploy-vdi-display-refresh.py

@@ -0,0 +1,75 @@
+"""Back up and deploy the VDD login refresh script in VM100, without rebooting."""
+import argparse
+import base64
+from pathlib import Path
+import runpy
+import sys
+
+sys.stdout.reconfigure(encoding="utf-8", errors="replace")
+parser = argparse.ArgumentParser(description=__doc__)
+parser.parse_args()
+root = Path(__file__).resolve().parent
+term = runpy.run_path(str(root / "pve_term_exec.py"))
+vm = runpy.run_path(str(root / "pve_vm.py"))
+ticket, csrf = term["login"]()
+state = vm["api"]("/api2/json/nodes/starhe/qemu/100/status/current", ticket=ticket)
+if state.get("status") != "running":
+    sys.exit("VM100 is not running; nothing changed")
+payload = base64.b64encode((root / "set-2k-display.ps1").read_bytes()).decode()
+command = r"""
+$ErrorActionPreference='Stop'
+$target='C:\ProgramData\VDI\set-2k-display.ps1'
+$task='VDISet2KDisplay'
+$entry=Get-ScheduledTask -TaskName $task
+if($entry.State -eq 'Running') { throw 'Display task is already running; inspect before deployment' }
+if(-not (Test-Path -LiteralPath $target)) { throw 'Original display script is missing' }
+if(($entry.Actions | Select-Object -First 1).Arguments -notlike '*set-2k-display.ps1*') {
+    throw 'Unexpected display task action; do not change it'
+}
+$backup='C:\ProgramData\VDI\backups\display-refresh-'+(Get-Date -Format 'yyyyMMdd-HHmmss')
+New-Item -ItemType Directory -Path $backup | Out-Null
+Copy-Item -LiteralPath $target -Destination "$backup\set-2k-display.ps1"
+Export-ScheduledTask -TaskName $task | Set-Content -Encoding UTF8 "$backup\VDISet2KDisplay.xml"
+if(Test-Path 'C:\ProgramData\VDI\set-2k-result.txt') {
+    Copy-Item 'C:\ProgramData\VDI\set-2k-result.txt' "$backup\previous-result.txt"
+}
+$temporary=$target+'.new'
+try {
+    [IO.File]::WriteAllBytes($temporary,[Convert]::FromBase64String('__PAYLOAD__'))
+    Move-Item -LiteralPath $temporary -Destination $target -Force
+    # Prove freshness by a newly created result file; scheduler LastRunTime can
+    # lag wall-clock time after VM clock correction and is not a reliable token.
+    Remove-Item -LiteralPath 'C:\ProgramData\VDI\set-2k-result.txt' -ErrorAction SilentlyContinue
+    Start-ScheduledTask -TaskName $task
+    Start-Sleep -Seconds 2
+    for($i=0;$i -lt 20;$i++) {
+        if((Get-ScheduledTask -TaskName $task).State -ne 'Running') { break }
+        Start-Sleep -Seconds 1
+    }
+    $info=Get-ScheduledTaskInfo -TaskName $task
+    if((Get-ScheduledTask -TaskName $task).State -eq 'Running' -or
+        $info.LastTaskResult -ne 0) {
+        throw 'New display task did not complete successfully'
+    }
+    $log=Get-Content 'C:\ProgramData\VDI\set-2k-result.txt' -Raw
+    if($log -notmatch 'result=0 mode=2560x1440@60') { throw '60Hz read-back missing in display task log' }
+    @{backup=$backup; task_result=$info.LastTaskResult; result=$log.Trim()} | ConvertTo-Json -Compress
+} catch {
+    if(Test-Path 'C:\ProgramData\VDI\set-2k-result.txt') {
+        Copy-Item 'C:\ProgramData\VDI\set-2k-result.txt' "$backup\failed-result.txt"
+        Get-Content "$backup\failed-result.txt"
+    }
+    if($info) { $info | Select-Object LastTaskResult,LastRunTime | ConvertTo-Json -Compress }
+    Stop-ScheduledTask -TaskName $task -ErrorAction SilentlyContinue
+    Copy-Item -LiteralPath "$backup\set-2k-display.ps1" -Destination $target -Force
+    Start-ScheduledTask -TaskName $task
+    throw
+} finally {
+    Remove-Item -LiteralPath $temporary -ErrorAction SilentlyContinue
+}
+""".replace("__PAYLOAD__", payload)
+out, error = vm["agent"](ticket, csrf, ["powershell.exe", "-NoProfile", "-Command", command])
+print(out)
+if error or '"task_result":0' not in out:
+    print(error, file=sys.stderr)
+    sys.exit(1)

tools/run-single-vdi-display.py

@@ -0,0 +1,55 @@
+"""Query or detach extra Windows desktop outputs in VM100's interactive session."""
+import argparse
+import base64
+from pathlib import Path
+import runpy
+import sys
+
+sys.stdout.reconfigure(encoding="utf-8", errors="replace")
+parser=argparse.ArgumentParser(description=__doc__)
+parser.add_argument("action", choices=["Query","Apply","Restore"])
+args=parser.parse_args()
+root=Path(__file__).resolve().parent
+t=runpy.run_path(str(root/"pve_term_exec.py")); v=runpy.run_path(str(root/"pve_vm.py"))
+ticket,csrf=t["login"]()
+if v["api"]("/api2/json/nodes/starhe/qemu/100/status/current",ticket=ticket).get("status")!="running":
+    sys.exit("VM100 is not running; nothing changed")
+payload=base64.b64encode((root/"set-single-vdi-display.ps1").read_bytes()).decode()
+command=r"""
+$ErrorActionPreference='Stop'
+$folder='C:\ProgramData\VDI\single-display-20261103'
+$task='VDISingleDisplayProbe'
+if(Get-ScheduledTask -TaskName $task -ErrorAction SilentlyContinue) { throw 'Task already exists' }
+$user=(Get-CimInstance Win32_ComputerSystem).UserName
+if(-not $user) { throw 'No interactive user' }
+New-Item -ItemType Directory -Force $folder | Out-Null
+$acl=Get-Acl $folder
+$acl.SetAccessRule((New-Object Security.AccessControl.FileSystemAccessRule($user,'Modify','ContainerInherit,ObjectInherit','None','Allow')))
+Set-Acl $folder $acl
+[IO.File]::WriteAllBytes("$folder\single.ps1",[Convert]::FromBase64String('__PAYLOAD__'))
+Remove-Item "$folder\result.txt" -ErrorAction SilentlyContinue
+$run="try { & '$folder\single.ps1' -Action __ACTION__ | Out-File -Encoding utf8 -Width 500 '$folder\result.txt' } catch { `$_ | Out-String | Out-File -Encoding utf8 -Width 500 '$folder\result.txt'; exit 1 }"
+$encoded=[Convert]::ToBase64String([Text.Encoding]::Unicode.GetBytes($run))
+$a=New-ScheduledTaskAction -Execute powershell.exe -Argument "-NoProfile -ExecutionPolicy Bypass -WindowStyle Hidden -EncodedCommand $encoded"
+$p=New-ScheduledTaskPrincipal -UserId $user -LogonType Interactive -RunLevel Limited
+$s=New-ScheduledTaskSettingsSet -ExecutionTimeLimit (New-TimeSpan -Minutes 2)
+Register-ScheduledTask -TaskName $task -Action $a -Principal $p -Settings $s | Out-Null
+try {
+    Start-ScheduledTask -TaskName $task
+    Start-Sleep -Seconds 2
+    for($i=0;$i-lt 30;$i++) {
+        if((Get-ScheduledTask -TaskName $task).State-ne 'Running') { break }
+        Start-Sleep -Seconds 1
+    }
+    if((Get-ScheduledTask -TaskName $task).State-eq 'Running') { throw 'Probe timed out' }
+    Get-Content "$folder\result.txt" -Raw
+    'task_result='+(Get-ScheduledTaskInfo -TaskName $task).LastTaskResult
+} finally {
+    Stop-ScheduledTask -TaskName $task -ErrorAction SilentlyContinue
+    Unregister-ScheduledTask -TaskName $task -Confirm:$false
+}
+""".replace("__PAYLOAD__",payload).replace("__ACTION__",args.action)
+out,err=v["agent"](ticket,csrf,["powershell.exe","-NoProfile","-Command",command])
+print(out)
+if err or "task_result=0" not in out:
+    sys.exit(err or "Display operation did not succeed")

tools/set-2k-display.ps1

@@ -1,3 +1,4 @@
+param([ValidateSet(30, 60)][int]$RefreshRate = 60)
 $ErrorActionPreference = 'Stop'
 Add-Type @'
 using System;
@@ -45,12 +46,12 @@ public static class VdiDisplayMode {
         if (!EnumDisplaySettings(name, -1, ref m)) return "unavailable";
         return m.width + "x" + m.height + "@" + m.hz;
     }
-    public static int Apply(string name) {
+    public static int Apply(string name, int refreshRate) {
         for (int i = 0; ; i++) {
             var m = new Mode();
             m.size = (short)Marshal.SizeOf(typeof(Mode));
             if (!EnumDisplaySettings(name, i, ref m)) return -99;
-            if (m.width == 2560 && m.height == 1440 && m.hz == 30) {
+            if (m.width == 2560 && m.height == 1440 && m.hz == refreshRate) {
                 m.fields = 0x80000 | 0x100000 | 0x400000;
                 int test = ChangeDisplaySettingsEx(name, ref m, IntPtr.Zero, 2, IntPtr.Zero);
                 if (test != 0) return test;
@@ -61,13 +62,18 @@ public static class VdiDisplayMode {
 }
 '@
 $log = 'C:/ProgramData/VDI/set-2k-result.txt'
+$expectedMode = "2560x1440@$RefreshRate"
 try {
     for ($i = 0; $i -lt 12; $i++) {
         $dev = [VdiDisplayMode]::Find()
         if ($dev) {
-            $result = [VdiDisplayMode]::Apply($dev)
+            if ([VdiDisplayMode]::Current($dev) -eq $expectedMode) {
+                "$(Get-Date -Format o) device=$dev result=0 mode=$expectedMode (already correct)" | Set-Content $log
+                exit 0
+            }
+            $result = [VdiDisplayMode]::Apply($dev, $RefreshRate)
             $mode = [VdiDisplayMode]::Current($dev)
-            if ($result -eq 0 -and $mode -eq '2560x1440@30') {
+            if ($result -eq 0 -and $mode -eq $expectedMode) {
                 "$(Get-Date -Format o) device=$dev result=0 mode=$mode" | Set-Content $log
                 exit 0
             }

tools/set-single-vdi-display.ps1

@@ -0,0 +1,134 @@
+param(
+    [ValidateSet('Query','Apply','Restore')][string]$Action='Query',
+    [string]$BackupPath='C:\ProgramData\VDI\single-display-20261103\before.xml'
+)
+$ErrorActionPreference='Stop'
+# Run as the logged-in desktop user. Detach desktop outputs, never disable GPUs.
+Add-Type -ReferencedAssemblies System.Xml,System.Core,System -TypeDefinition @'
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Runtime.InteropServices;
+using System.Xml.Serialization;
+public static class VdiSingleDisplay {
+    [StructLayout(LayoutKind.Sequential,CharSet=CharSet.Unicode)]
+    public struct Device {
+        public int cb;
+        [MarshalAs(UnmanagedType.ByValTStr,SizeConst=32)] public string Name;
+        [MarshalAs(UnmanagedType.ByValTStr,SizeConst=128)] public string Description;
+        public int Flags;
+        [MarshalAs(UnmanagedType.ByValTStr,SizeConst=128)] public string Id;
+        [MarshalAs(UnmanagedType.ByValTStr,SizeConst=128)] public string Key;
+    }
+    [StructLayout(LayoutKind.Sequential,CharSet=CharSet.Unicode)]
+    public struct Mode {
+        [MarshalAs(UnmanagedType.ByValTStr,SizeConst=32)] public string name;
+        public short spec,driver,size,extra;
+        public int fields,x,y,orientation,fixedOutput;
+        public short color,duplex,yres,tt,collate;
+        [MarshalAs(UnmanagedType.ByValTStr,SizeConst=32)] public string form;
+        public short logPixels;
+        public int bpp,width,height,flags,hz,icmMethod,icmIntent,media,dither,reserved1,reserved2,panWidth,panHeight;
+    }
+    public class Record { public Device device; public Mode mode; public bool hasMode; }
+    [DllImport("user32.dll",CharSet=CharSet.Unicode)] static extern bool EnumDisplayDevices(string name,uint index,ref Device device,uint flags);
+    [DllImport("user32.dll",CharSet=CharSet.Unicode)] static extern bool EnumDisplaySettings(string name,int index,ref Mode mode);
+    [DllImport("user32.dll",CharSet=CharSet.Unicode)] static extern int ChangeDisplaySettingsEx(string name,ref Mode mode,IntPtr hwnd,uint flags,IntPtr param);
+    [DllImport("user32.dll",CharSet=CharSet.Unicode,EntryPoint="ChangeDisplaySettingsExW")]
+    static extern int Commit(string name,IntPtr mode,IntPtr hwnd,uint flags,IntPtr param);
+    public static Record[] Query() {
+        var result=new List<Record>();
+        for(uint i=0;;i++) {
+            Device d=new Device(); d.cb=Marshal.SizeOf(typeof(Device));
+            if(!EnumDisplayDevices(null,i,ref d,0)) return result.ToArray();
+            if((d.Flags&8)!=0) continue;
+            Mode m=new Mode(); m.size=(short)Marshal.SizeOf(typeof(Mode));
+            bool ok=EnumDisplaySettings(d.Name,-1,ref m);
+            result.Add(new Record {device=d,mode=m,hasMode=ok});
+        }
+    }
+    static void Check(int code,string operation) {
+        if(code!=0) throw new InvalidOperationException(operation+" failed: "+code+" (no reboot will be requested)");
+    }
+    public static string Target(Record[] records) {
+        string found=null;
+        foreach(var r in records) if((r.device.Flags&1)!=0 && r.device.Description.IndexOf("Virtual Display Driver",StringComparison.OrdinalIgnoreCase)>=0) {
+            if(found!=null) throw new InvalidOperationException("Multiple active VDD outputs; refuse ambiguous selection");
+            if(!r.hasMode || r.mode.width<640 || r.mode.height<480) throw new InvalidOperationException("Invalid active VDD mode");
+            found=r.device.Name;
+        }
+        if(found==null) throw new InvalidOperationException("No active VDD; do not detach anything");
+        return found;
+    }
+    public static void Save(Record[] records,string path) {
+        using(var stream=new FileStream(path,FileMode.CreateNew,FileAccess.Write)) new XmlSerializer(typeof(Record[])).Serialize(stream,records);
+    }
+    public static Record[] Load(string path) {
+        using(var stream=File.OpenRead(path)) return (Record[])new XmlSerializer(typeof(Record[])).Deserialize(stream);
+    }
+    static void Stage(Record record,bool active,bool primary) {
+        Mode m=record.mode; m.size=(short)Marshal.SizeOf(typeof(Mode)); m.extra=0;
+        if(active) {
+            if(!record.hasMode) throw new InvalidOperationException("Missing original mode");
+            m.fields=0x20|0x40000|0x80000|0x100000|0x400000;
+        } else {
+            m.width=m.height=0; m.fields=0x20|0x80000|0x100000;
+        }
+        Check(ChangeDisplaySettingsEx(record.device.Name,ref m,IntPtr.Zero,0x10000001u|(primary?0x10u:0u),IntPtr.Zero),"Stage "+record.device.Name);
+    }
+    public static void Apply(Record[] before,string keep) {
+        foreach(var r0 in before) if(r0.device.Name==keep) {
+            Record r=new Record {device=r0.device,mode=r0.mode,hasMode=r0.hasMode};
+            Mode m=r.mode; m.x=m.y=0; r.mode=m; Stage(r,true,true);
+        }
+        foreach(var r in before) if(r.device.Name!=keep && (r.device.Flags&1)!=0) Stage(r,false,false);
+        Check(Commit(null,IntPtr.Zero,IntPtr.Zero,0,IntPtr.Zero),"Commit single display");
+    }
+    public static void Restore(Record[] before) {
+        Record[] now=Query();
+        foreach(var old in before) {
+            bool matched=false;
+            foreach(var r in now) if(r.device.Name==old.device.Name && r.device.Id==old.device.Id && r.device.Key==old.device.Key) matched=true;
+            if(!matched) throw new InvalidOperationException("Display identity changed; refuse stale restore: "+old.device.Name);
+        }
+        foreach(var r in before) if((r.device.Flags&4)!=0) Stage(r,true,true);
+        foreach(var r in before) if((r.device.Flags&4)==0) {
+            bool currentlyActive=false;
+            foreach(var current in now) if(current.device.Name==r.device.Name) currentlyActive=(current.device.Flags&1)!=0;
+            if((r.device.Flags&1)!=0 || currentlyActive) Stage(r,(r.device.Flags&1)!=0,false);
+        }
+        Check(Commit(null,IntPtr.Zero,IntPtr.Zero,0,IntPtr.Zero),"Restore topology");
+    }
+}
+'@
+function Report {
+    @([VdiSingleDisplay]::Query() | ForEach-Object {
+        @{device=$_.device.Name; description=$_.device.Description; active=(($_.device.Flags-band 1)-ne 0);
+          primary=(($_.device.Flags-band 4)-ne 0); width=$_.mode.width; height=$_.mode.height; hz=$_.mode.hz; x=$_.mode.x; y=$_.mode.y}
+    }) | ConvertTo-Json -Depth 4 -Compress
+}
+if($Action -eq 'Query') { Report; exit 0 }
+if($Action -eq 'Restore') { [VdiSingleDisplay]::Restore([VdiSingleDisplay]::Load($BackupPath)); Report; exit 0 }
+$before=[VdiSingleDisplay]::Query()
+$keep=[VdiSingleDisplay]::Target($before)
+$target=@($before | Where-Object {$_.device.Name -eq $keep})[0]
+if($target.mode.width -ne 2560 -or $target.mode.height -ne 1440 -or $target.mode.hz -ne 60 -or ($target.device.Flags-band 4)-eq 0) {
+    throw 'Required existing 2560x1440@60 VDD primary is absent; nothing changed'
+}
+$active=@($before | Where-Object {($_.device.Flags-band 1)-ne 0})
+if($active.Count -eq 1 -and ($active[0].device.Flags-band 4)-ne 0) { Report; exit 0 }
+New-Item -ItemType Directory -Force (Split-Path $BackupPath) | Out-Null
+[VdiSingleDisplay]::Save($before,$BackupPath)
+try {
+    [VdiSingleDisplay]::Apply($before,$keep)
+    Start-Sleep -Seconds 2
+    $actual=@([VdiSingleDisplay]::Query() | Where-Object {($_.device.Flags-band 1)-ne 0})
+    if($actual.Count -ne 1 -or $actual[0].device.Name -ne $keep -or ($actual[0].device.Flags-band 4)-eq 0) { throw 'Single VDD primary read-back failed' }
+    $old=@($before | Where-Object {$_.device.Name -eq $keep})[0]
+    if($actual[0].mode.width-ne $old.mode.width -or $actual[0].mode.height-ne $old.mode.height -or $actual[0].mode.hz-ne $old.mode.hz) { throw 'VDD mode changed unexpectedly' }
+    Report
+} catch {
+    $failure=$_
+    [VdiSingleDisplay]::Restore($before)
+    throw $failure
+}

tools/set-terminal-fps.py

@@ -0,0 +1,51 @@
+"""Query or change only the Windows desktop FPS in the box's local POC config."""
+import argparse
+import subprocess
+import sys
+
+parser = argparse.ArgumentParser(description=__doc__)
+parser.add_argument("--fps", type=int, choices=[30, 45, 60], required=True)
+parser.add_argument("--apply", action="store_true")
+args = parser.parse_args()
+program = r'''
+from pathlib import Path
+from datetime import datetime
+import json, os, shutil, stat, tempfile
+path=Path.home()/'.config/vdi-terminal/desktops.json'
+original=path.read_bytes()
+data=json.loads(original)
+matches=[d for d in data['desktops'] if d.get('id')=='desk-win10-01']
+if len(matches)!=1 or matches[0].get('endpoint')!='192.168.1.70':
+    raise RuntimeError('Unexpected Windows desktop identity; inspect before changing')
+desktop=matches[0]
+before=desktop.get('fps')
+backup=None
+if __APPLY__:
+    backup=Path.home()/'vdi-terminal/backups'/('fps-'+datetime.now().strftime('%Y%m%d-%H%M%S-%f'))
+    backup.mkdir(parents=True)
+    shutil.copy2(path,backup/'desktops.json')
+    desktop['fps']=__FPS__
+    name=None
+    try:
+        with tempfile.NamedTemporaryFile(dir=path.parent,prefix='.desktops-',delete=False) as stream:
+            name=stream.name
+            stream.write((json.dumps(data,ensure_ascii=False,indent=2)+'\n').encode())
+        os.chmod(name,stat.S_IMODE(path.stat().st_mode))
+        if path.read_bytes()!=original:
+            raise RuntimeError('Desktop configuration changed concurrently; left it intact')
+        os.replace(name,path)
+        name=None
+        if json.loads(path.read_bytes())!=data:
+            raise RuntimeError('Desktop configuration read-back mismatch')
+    finally:
+        if name is not None: os.unlink(name)
+print(json.dumps({'desktop':desktop['id'],'before':before,'fps':desktop['fps'],
+                  'requested':__FPS__,'applied':__APPLY__,
+                  'backup':str(backup) if backup else None}))
+'''.replace("__FPS__", str(args.fps)).replace("__APPLY__", str(args.apply))
+result = subprocess.run(["ssh", "-o", "ConnectTimeout=8", "armbian@192.168.1.188", "python3 -"],
+                        input=program, capture_output=True, text=True, encoding="utf-8")
+print(result.stdout, end="")
+if result.stderr:
+    print(result.stderr, end="", file=sys.stderr)
+sys.exit(result.returncode)