feat: GPU切换回退保护逻辑

- switchGpu切换前写入备份文件(.gpu-switch-backup)记录之前模式
- init()检测未确认的切换，启动30秒自动回退计时器
- QML弹出'显示是否正常'确认覆盖层，支持手动确认/回退/超时自动回退
- confirmSwitchSuccess()用户确认正常后删除备份
- restoreFromBackup()自动恢复之前模式并发送通知
- primeOffloadEnabled属性检测当前PRIME offload状态
- switchGpu改用environment.d方式，不需要root/pkexec
- 翻译更新：回退确认相关8条新增

graphicsdriverapplet.cpp

@@ -28,6 +28,9 @@ GraphicsDriverApplet::GraphicsDriverApplet(QObject *parent)
     , m_ready(false)
     , m_lastAlertTime(0)
     , m_tempAlertEnabled(true)
+    , m_switchPending(false)
+    , m_restoreCountdown(0)
+    , m_restoreTimer(nullptr)
 {
     QSettings settings("deepin", "graphics-driver-applet");
     m_tempAlertEnabled = settings.value("tempAlertEnabled", true).toBool();
@@ -45,6 +48,29 @@ bool GraphicsDriverApplet::load()
 bool GraphicsDriverApplet::init()
 {
     detectGpus();
+
+    // 检查是否有未确认的 GPU 切换（上次切换后可能黑屏）
+    QFile backup(backupFilePath());
+    if (backup.exists()) {
+        // 有备份文件，说明上次切换未确认，启动 30 秒回退计时器
+        m_switchPending = true;
+        m_restoreCountdown = 30;
+        emit switchPendingChanged();
+        emit restoreCountdownChanged();
+
+        m_restoreTimer = new QTimer(this);
+        connect(m_restoreTimer, &QTimer::timeout, this, [this]() {
+            m_restoreCountdown--;
+            emit restoreCountdownChanged();
+            if (m_restoreCountdown <= 0) {
+                restoreFromBackup();
+            }
+        });
+        m_restoreTimer->start(1000);
+
+        qDebug() << "Unconfirmed GPU switch detected, auto-restore in 30s";
+    }
+
     return DApplet::init();
 }
 
@@ -115,6 +141,35 @@ void GraphicsDriverApplet::setTempAlertEnabled(bool enabled)
     emit tempAlertEnabledChanged();
 }
 
+bool GraphicsDriverApplet::primeOffloadEnabled() const
+{
+    QString configPath = QDir::homePath() + "/.config/environment.d/nvidia-prime.conf";
+    QFile file(configPath);
+    if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) return false;
+    QString content = QTextStream(&file).readAll();
+    return content.contains("__NV_PRIME_RENDER_OFFLOAD=1");
+}
+
+bool GraphicsDriverApplet::switchPending() const
+{
+    return m_switchPending;
+}
+
+int GraphicsDriverApplet::restoreCountdown() const
+{
+    return m_restoreCountdown;
+}
+
+QString GraphicsDriverApplet::primeConfigPath()
+{
+    return QDir::homePath() + "/.config/environment.d/nvidia-prime.conf";
+}
+
+QString GraphicsDriverApplet::backupFilePath()
+{
+    return QDir::homePath() + "/.config/environment.d/.gpu-switch-backup";
+}
+
 void GraphicsDriverApplet::refreshDeviceInfo()
 {
     detectGpus();
@@ -649,10 +704,109 @@ void GraphicsDriverApplet::readGpuProcesses()
 bool GraphicsDriverApplet::switchGpu(const QString &mode)
 {
     // mode: "nvidia" / "intel" / "on-demand"
-    QProcess process;
+    QString configPath = primeConfigPath();
-    process.start("pkexec", {"prime-select", "set", mode});
+    QString backupPath = backupFilePath();
-    process.waitForFinished(30000);
+    QString configDir = QDir::homePath() + "/.config/environment.d";
-    return process.exitCode() == 0;
+    QDir().mkpath(configDir);
+
+    // 保存当前模式到备份文件（用于回退）
+    QString prevMode = primeOffloadEnabled() ? "nvidia" : "on-demand";
+    QFile backupFile(backupPath);
+    if (backupFile.open(QIODevice::WriteOnly | QIODevice::Text)) {
+        QTextStream(&backupFile) << prevMode;
+        backupFile.close();
+    }
+
+    if (mode == "intel") {
+        QFile::remove(configPath);
+    } else if (mode == "nvidia") {
+        QFile file(configPath);
+        if (file.open(QIODevice::WriteOnly | QIODevice::Text)) {
+            QTextStream(&file) << "__NV_PRIME_RENDER_OFFLOAD=1\n"
+                               << "__GLX_VENDOR_LIBRARY_NAME=nvidia\n";
+            file.close();
+        }
+    } else if (mode == "on-demand") {
+        QFile::remove(configPath);
+    }
+
+    sendNotification(tr("GPU Mode Switched"),
+                     tr("Switched to %1 mode. Please re-login to take effect.").arg(mode));
+
+    detectGpuMode();
+    emit primeOffloadEnabledChanged();
+
+    return true;
+}
+
+void GraphicsDriverApplet::confirmSwitchSuccess()
+{
+    // 用户确认显示正常，删除备份文件
+    QFile::remove(backupFilePath());
+
+    m_switchPending = false;
+    m_restoreCountdown = 0;
+    emit switchPendingChanged();
+    emit restoreCountdownChanged();
+
+    if (m_restoreTimer) {
+        m_restoreTimer->stop();
+        m_restoreTimer->deleteLater();
+        m_restoreTimer = nullptr;
+    }
+
+    qDebug() << "GPU switch confirmed by user";
+}
+
+void GraphicsDriverApplet::restoreSwitch()
+{
+    // 用户手动请求回退
+    restoreFromBackup();
+}
+
+void GraphicsDriverApplet::restoreFromBackup()
+{
+    // 从备份文件恢复
+    QFile backupFile(backupFilePath());
+    if (!backupFile.open(QIODevice::ReadOnly | QIODevice::Text)) {
+        m_switchPending = false;
+        emit switchPendingChanged();
+        return;
+    }
+
+    QString prevMode = QTextStream(&backupFile).readAll().trimmed();
+    backupFile.close();
+    QFile::remove(backupFilePath());
+
+    QString configPath = primeConfigPath();
+
+    if (prevMode == "nvidia") {
+        QFile file(configPath);
+        if (file.open(QIODevice::WriteOnly | QIODevice::Text)) {
+            QTextStream(&file) << "__NV_PRIME_RENDER_OFFLOAD=1\n"
+                               << "__GLX_VENDOR_LIBRARY_NAME=nvidia\n";
+            file.close();
+        }
+    } else {
+        QFile::remove(configPath);
+    }
+
+    m_switchPending = false;
+    m_restoreCountdown = 0;
+    emit switchPendingChanged();
+    emit restoreCountdownChanged();
+    emit primeOffloadEnabledChanged();
+
+    if (m_restoreTimer) {
+        m_restoreTimer->stop();
+        m_restoreTimer->deleteLater();
+        m_restoreTimer = nullptr;
+    }
+
+    sendNotification(tr("GPU Mode Restored"),
+                     tr("Reverted to %1 mode. Please re-login to take effect.").arg(prevMode));
+
+    qDebug() << "GPU mode restored to" << prevMode;
 }
 
 D_APPLET_CLASS(GraphicsDriverApplet)

graphicsdriverapplet.h

@@ -47,6 +47,9 @@ class GraphicsDriverApplet : public DApplet
     Q_PROPERTY(QVariantList tempHistory READ tempHistory NOTIFY tempHistoryChanged)
     Q_PROPERTY(QStringList gpuProcesses READ gpuProcesses NOTIFY gpuProcessesChanged)
     Q_PROPERTY(bool tempAlertEnabled READ tempAlertEnabled WRITE setTempAlertEnabled NOTIFY tempAlertEnabledChanged)
+    Q_PROPERTY(bool primeOffloadEnabled READ primeOffloadEnabled NOTIFY primeOffloadEnabledChanged)
+    Q_PROPERTY(bool switchPending READ switchPending NOTIFY switchPendingChanged)
+    Q_PROPERTY(int restoreCountdown READ restoreCountdown NOTIFY restoreCountdownChanged)
 
 public:
     explicit GraphicsDriverApplet(QObject *parent = nullptr);
@@ -66,10 +69,15 @@ public:
     QStringList gpuProcesses() const;
     bool tempAlertEnabled() const;
     void setTempAlertEnabled(bool enabled);
+    bool primeOffloadEnabled() const;
+    bool switchPending() const;
+    int restoreCountdown() const;
 
     Q_INVOKABLE void refreshDeviceInfo();
     Q_INVOKABLE void refreshStats();
     Q_INVOKABLE bool switchGpu(const QString &mode);
+    Q_INVOKABLE void confirmSwitchSuccess();
+    Q_INVOKABLE void restoreSwitch();
 
 signals:
     void deviceInfoChanged();
@@ -82,6 +90,9 @@ signals:
     void tempHistoryChanged();
     void gpuProcessesChanged();
     void tempAlertEnabledChanged();
+    void primeOffloadEnabledChanged();
+    void switchPendingChanged();
+    void restoreCountdownChanged();
 
 private:
     void detectGpus();
@@ -90,6 +101,9 @@ private:
     void detectGpuMode();
     void checkTempAlert();
     void sendNotification(const QString &summary, const QString &body);
+    void restoreFromBackup();
+    static QString primeConfigPath();
+    static QString backupFilePath();
     static int findDrmCard(const QString &pciId);
     static QStringList runCommand(const QString &cmd, const QStringList &args);
     static QString parseGpuName(const QString &line);
@@ -110,6 +124,9 @@ private:
     // 温度告警冷却时间戳
     qint64 m_lastAlertTime;
     bool m_tempAlertEnabled;
+    bool m_switchPending;
+    int m_restoreCountdown;
+    QTimer *m_restoreTimer;
 };
 
 DS_END_NAMESPACE

package/driverview.qml

@@ -28,13 +28,8 @@ AppletItem {
 
     // 当前 PRIME 模式（nvidia/on-demand/intel）
     readonly property string currentPrimeMode: {
-        if (root.gpuMode !== "PRIME" || !root.applet || !root.applet.gpuPrimary) return ""
+        if (root.gpuMode !== "PRIME") return ""
-        var lines = root.deviceInfo.split("\n").filter(function(l) { return l.trim().length > 0 })
+        if (root.applet && root.applet.primeOffloadEnabled) return "nvidia"
-        for (var i = 0; i < lines.length; i++) {
-            if (/nvidia/i.test(lines[i]) && root.applet.gpuPrimary[i] === "true") {
-                return "nvidia"
-            }
-        }
         return "on-demand"
     }
 
@@ -1071,6 +1066,98 @@ AppletItem {
             }
         }
 
+        // GPU 切换回退确认覆盖层（启动时检测到未确认的切换）
+        Rectangle {
+            id: restoreOverlay
+            anchors.fill: parent
+            color: Qt.rgba(0, 0, 0, 0.75)
+            radius: 12
+            visible: root.applet && root.applet.switchPending
+            z: 100
+
+            ColumnLayout {
+                anchors.centerIn: parent
+                width: parent.width - 48
+                spacing: 16
+
+                // 警告图标
+                Text {
+                    Layout.alignment: Qt.AlignHCenter
+                    text: "⚠"
+                    font.pixelSize: 36
+                    color: Qt.rgba(245/255, 158/255, 11/255, 1)
+                }
+
+                // 标题
+                Text {
+                    Layout.alignment: Qt.AlignHCenter
+                    text: qsTr("Display OK?")
+                    font.pixelSize: 18
+                    font.bold: true
+                    color: "#e8e8e8"
+                }
+
+                // 说明
+                Text {
+                    Layout.alignment: Qt.AlignHCenter
+                    Layout.fillWidth: true
+                    text: qsTr("GPU mode was changed. If display is abnormal, it will auto-revert in %1s.").arg(root.applet ? root.applet.restoreCountdown : 0)
+                    font.pixelSize: 12
+                    color: "#a0a0a0"
+                    horizontalAlignment: Text.AlignHCenter
+                    wrapMode: Text.WordWrap
+                }
+
+                // 按钮行
+                RowLayout {
+                    Layout.fillWidth: true
+                    spacing: 12
+
+                    // 回退按钮
+                    Button {
+                        Layout.fillWidth: true
+                        Layout.preferredHeight: 34
+                        font.pixelSize: 12
+
+                        background: Rectangle {
+                            color: parent.hovered ? Qt.rgba(220/255, 38/255, 38/255, 0.8) : Qt.rgba(220/255, 38/255, 38/255, 0.3)
+                            radius: 8
+                            border.width: 1
+                            border.color: Qt.rgba(220/255, 38/255, 38/255, 0.6)
+                        }
+                        contentItem: Text {
+                            text: qsTr("Revert")
+                            color: "#ff6b6b"
+                            font.pixelSize: 12
+                            font.bold: true
+                            horizontalAlignment: Text.AlignHCenter
+                        }
+                        onClicked: if (root.applet) root.applet.restoreSwitch()
+                    }
+
+                    // 确认正常按钮
+                    Button {
+                        Layout.fillWidth: true
+                        Layout.preferredHeight: 34
+                        font.pixelSize: 12
+
+                        background: Rectangle {
+                            color: parent.hovered ? Qt.darker(root.accentBlue, 1.2) : root.accentBlue
+                            radius: 8
+                        }
+                        contentItem: Text {
+                            text: qsTr("Display OK")
+                            color: "white"
+                            font.pixelSize: 12
+                            font.bold: true
+                            horizontalAlignment: Text.AlignHCenter
+                        }
+                        onClicked: if (root.applet) root.applet.confirmSwitchSuccess()
+                    }
+                }
+            }
+        }
+
         Component.onCompleted: {
             DockPanelPositioner.bounding = Qt.binding(function () {
                 const point = root.mapToItem(null, root.width / 2, root.height / 2)

translations/org.deepin.ds.graphics-driver_zh_CN.ts

@@ -193,5 +193,45 @@
         <source>Integrated</source>
         <translation>核显</translation>
     </message>
+    <message>
+        <location filename="../package/driverview.qml"/>
+        <source>Display OK?</source>
+        <translation>显示是否正常？</translation>
+    </message>
+    <message>
+        <location filename="../package/driverview.qml"/>
+        <source>GPU mode was changed. If display is abnormal, it will auto-revert in %1s.</source>
+        <translation>GPU 模式已切换。如果显示异常，将在 %1 秒后自动回退。</translation>
+    </message>
+    <message>
+        <location filename="../package/driverview.qml"/>
+        <source>Revert</source>
+        <translation>回退</translation>
+    </message>
+    <message>
+        <location filename="../package/driverview.qml"/>
+        <source>Display OK</source>
+        <translation>显示正常</translation>
+    </message>
+    <message>
+        <location filename="../package/driverview.qml"/>
+        <source>GPU Mode Switched</source>
+        <translation>GPU 模式已切换</translation>
+    </message>
+    <message>
+        <location filename="../package/driverview.qml"/>
+        <source>Switched to %1 mode. Please re-login to take effect.</source>
+        <translation>已切换到 %1 模式，请重新登录生效。</translation>
+    </message>
+    <message>
+        <location filename="../package/driverview.qml"/>
+        <source>GPU Mode Restored</source>
+        <translation>GPU 模式已恢复</translation>
+    </message>
+    <message>
+        <location filename="../package/driverview.qml"/>
+        <source>Reverted to %1 mode. Please re-login to take effect.</source>
+        <translation>已恢复到 %1 模式，请重新登录生效。</translation>
+    </message>
 </context>
 </TS>

translations/org.deepin.ds.graphics-driver_zh_TW.ts

@@ -193,5 +193,45 @@
         <source>Integrated</source>
         <translation>核顯</translation>
     </message>
+    <message>
+        <location filename="../package/driverview.qml"/>
+        <source>Display OK?</source>
+        <translation>顯示是否正常？</translation>
+    </message>
+    <message>
+        <location filename="../package/driverview.qml"/>
+        <source>GPU mode was changed. If display is abnormal, it will auto-revert in %1s.</source>
+        <translation>GPU 模式已切換。如果顯示異常，將在 %1 秒後自動回退。</translation>
+    </message>
+    <message>
+        <location filename="../package/driverview.qml"/>
+        <source>Revert</source>
+        <translation>回退</translation>
+    </message>
+    <message>
+        <location filename="../package/driverview.qml"/>
+        <source>Display OK</source>
+        <translation>顯示正常</translation>
+    </message>
+    <message>
+        <location filename="../package/driverview.qml"/>
+        <source>GPU Mode Switched</source>
+        <translation>GPU 模式已切換</translation>
+    </message>
+    <message>
+        <location filename="../package/driverview.qml"/>
+        <source>Switched to %1 mode. Please re-login to take effect.</source>
+        <translation>已切換到 %1 模式，請重新登入生效。</translation>
+    </message>
+    <message>
+        <location filename="../package/driverview.qml"/>
+        <source>GPU Mode Restored</source>
+        <translation>GPU 模式已恢復</translation>
+    </message>
+    <message>
+        <location filename="../package/driverview.qml"/>
+        <source>Reverted to %1 mode. Please re-login to take effect.</source>
+        <translation>已恢復到 %1 模式，請重新登入生效。</translation>
+    </message>
 </context>
 </TS>