Description: Remove DPMS-related and screensaver-suspending-related code
 lxqt-powermanagement added some code that allows the power manager to mess
 with DPMS stuff. However it appears that DPMS is oftentimes not available in
 Lubuntu, making lxqt-powermanagement crash over and over until it finally
 gets disabled by LXQt until the next login. Some screensaver-related stuff
 was also thrown in which seems unrelated but is in with a function that
 sets DPMS timeouts. This patch removes all of that code, fixing the crashes.
Author: Aaron Rainbolt
Origin: ubuntu
Last-Update: 2023-11-14
---
This patch header follows DEP-3: http://dep.debian.net/deps/dep3/
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 876ecc3..9585409 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -15,22 +15,18 @@ set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 
 option(UPDATE_TRANSLATIONS "Update source translation translations/*.ts files" OFF)
 
-set(LXQTBT_MINIMUM_VERSION "0.13.0")
 set(KF5_MINIMUM_VERSION "5.36.0")
 set(LXQT_MINIMUM_VERSION "1.4.0")
 set(QT_MINIMUM_VERSION "5.15.0")
 
-find_package(lxqt-build-tools ${LXQTBT_MINIMUM_VERSION} REQUIRED)
 find_package(Qt5DBus ${QT_MINIMUM_VERSION} REQUIRED)
 find_package(Qt5LinguistTools ${QT_MINIMUM_VERSION} REQUIRED)
 find_package(Qt5Svg ${QT_MINIMUM_VERSION} REQUIRED)
 find_package(Qt5Widgets ${QT_MINIMUM_VERSION} REQUIRED)
-find_package(Qt5X11Extras ${QT_MINIMUM_VERSION} REQUIRED)
 find_package(KF5IdleTime ${KF5_MINIMUM_VERSION} REQUIRED)
 find_package(KF5Solid ${KF5_MINIMUM_VERSION} REQUIRED)
 find_package(lxqt ${LXQT_MINIMUM_VERSION} REQUIRED)
 find_package(lxqt-globalkeys-ui ${LXQT_GLOBALKEYS_MINIMUM_VERSION} REQUIRED)
-find_package(XCB REQUIRED COMPONENTS xcb-dpms xcb-screensaver)
 
 message(STATUS "Building with Qt${Qt5Core_VERSION}")
 
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index b29362a..177ddb1 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -57,8 +57,6 @@ target_link_libraries(lxqt-powermanagement
     KF5::Solid
     KF5::IdleTime
     lxqt-globalkeys
-    Qt5::X11Extras
-    ${XCB_LIBRARIES}
 )
 
 install(TARGETS
diff --git a/src/idlenesswatcher.cpp b/src/idlenesswatcher.cpp
index 615519e..5ff2ad1 100644
--- a/src/idlenesswatcher.cpp
+++ b/src/idlenesswatcher.cpp
@@ -24,7 +24,7 @@
 
 #include "idlenesswatcher.h"
 
-#include <QGuiApplication>
+#include <QCoreApplication>
 #include <QTimer>
 #include <KIdleTime>
 #include <Solid/Device>
@@ -34,9 +34,6 @@
 #include <QDebug>
 #include <LXQt/lxqtnotification.h>
 #include <QObject>
-#include <QX11Info>
-#include <xcb/dpms.h>
-#include <xcb/screensaver.h>
 
 IdlenessWatcher::IdlenessWatcher(QObject* parent):
     Watcher(parent)
@@ -70,43 +67,14 @@ IdlenessWatcher::IdlenessWatcher(QObject* parent):
 
     connect(&mPSettings, &LXQt::Settings::settingsChanged, this, &IdlenessWatcher::onSettingsChanged);
 
-    // retrieve DPMS timeouts
-    mDpmsStandby = mDpmsSuspend = mDpmsOff = 0;
-    if (QGuiApplication::platformName() == QStringLiteral("xcb")) {
-        xcb_connection_t* c = QX11Info::connection();
-        xcb_dpms_get_timeouts_cookie_t cookie = xcb_dpms_get_timeouts(c);
-        xcb_dpms_get_timeouts_reply_t* reply = xcb_dpms_get_timeouts_reply(c, cookie, nullptr);
-        if (reply) {
-            mDpmsStandby = reply->standby_timeout;
-            mDpmsSuspend = reply->suspend_timeout;
-            mDpmsOff = reply->off_timeout;
-            free(reply);
-        }
-    }
-
     setup();
 }
 
 IdlenessWatcher::~IdlenessWatcher()
 {
-    setDpmsTimeouts(true);
     KIdleTime::instance()->removeAllIdleTimeouts();
 }
 
-void IdlenessWatcher::setDpmsTimeouts(bool restore) {
-    if (QGuiApplication::platformName() == QStringLiteral("xcb")) {
-        xcb_connection_t* c = QX11Info::connection();
-        if (restore) {
-            xcb_dpms_set_timeouts(c, mDpmsStandby, mDpmsSuspend, mDpmsOff);
-            xcb_screensaver_suspend(c, 0); // WARNING: This is not documented but works.
-        }
-        else {
-            xcb_dpms_set_timeouts(c, 0, 0, 0);
-            xcb_screensaver_suspend(c, XCB_SCREENSAVER_SUSPEND);
-        }
-    }
-}
-
 void IdlenessWatcher::setup()
 {
     if(mPSettings.isIdlenessWatcherEnabled()) {
@@ -140,13 +108,6 @@ void IdlenessWatcher::setup()
                 milliseconds = 1000;
             mIdleBacklightWatcher = KIdleTime::instance()->addIdleTimeout(milliseconds);
         }
-
-        // override DPMS settings
-        setDpmsTimeouts(false);
-    }
-    else {
-        // restore DPMS settings
-        setDpmsTimeouts(true);
     }
 }
 
diff --git a/src/idlenesswatcher.h b/src/idlenesswatcher.h
index dce9cc6..af0b585 100644
--- a/src/idlenesswatcher.h
+++ b/src/idlenesswatcher.h
@@ -45,8 +45,6 @@ private Q_SLOTS:
     void onSettingsChanged();
 
 private:
-    void setDpmsTimeouts(bool restore);
-
     PowerManagementSettings mPSettings;
     int mIdleACWatcher;
     int mIdleBatteryWatcher;
@@ -54,7 +52,6 @@ private:
     LXQt::Backlight *mBacklight;
     int mBacklightActualValue;
     bool mDischarging;
-    quint16 mDpmsStandby, mDpmsSuspend, mDpmsOff;
 };
 
 #endif // IDLENESSWATCHER_H
diff --git a/src/main.cpp b/src/main.cpp
index eedd360..493bf8b 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -34,7 +34,7 @@
 int main(int argc, char *argv[])
 {
 
-    LXQt::Application a(argc, argv, true);
+    LXQt::Application a(argc, argv);
     a.setQuitOnLastWindowClosed(false);
 
     QCommandLineParser parser;