[plasma/kwin] src: core/gpumanager: show notifications about GPU resets

Git commit ef89a7b1559ba073310524d129dd383b7b1519ef by Xaver Hugl.
Committed on 18/08/2026 at 11:30.
Pushed by zamundaaa into branch 'master'.

core/gpumanager: show notifications about GPU resets

This is better than the previous notification, since we can actually
show it for all GPUs, and even if KWin wasn't affected by the reset.

M  +0    -8    src/compositor.cpp
M  +32   -0    src/core/gpumanager.cpp

https://invent.kde.org/plasma/kwin/-/commit/ef89a7b1559ba073310524d129dd383b7b1519ef

diff --git a/src/compositor.cpp b/src/compositor.cpp
index 8137aa00eaa..54df6209e88 100644
--- a/src/compositor.cpp
+++ b/src/compositor.cpp
@@ -42,11 +42,6 @@
 #include "workspace.h"
 
 #include <KCrash>
-#if KWIN_BUILD_NOTIFICATIONS
-#include <KLocalizedString>
-#include <KNotification>
-#endif
-
 #include <QQuickWindow>
 #include <optional>
 #include <ranges>
@@ -756,9 +751,6 @@ void Compositor::composite(RenderLoop *renderLoop)
 {
     if (m_backend->checkGraphicsReset()) {
         qCDebug(KWIN_CORE) << "Graphics reset occurred";
-#if KWIN_BUILD_NOTIFICATIONS
-        KNotification::event(QStringLiteral("graphicsreset"), i18n("Desktop effects were restarted due to a graphics reset"));
-#endif
         reinitialize();
         return;
     }
diff --git a/src/core/gpumanager.cpp b/src/core/gpumanager.cpp
index 9051ffae14e..d70a3a2481d 100644
--- a/src/core/gpumanager.cpp
+++ b/src/core/gpumanager.cpp
@@ -25,6 +25,11 @@
 #include <linux/udmabuf.h>
 #endif
 
+#if KWIN_BUILD_NOTIFICATIONS
+#include <KLocalizedString>
+#include <KNotification>
+#endif
+
 namespace KWin
 {
 
@@ -250,6 +255,33 @@ void GpuManager::scanForRenderDevices()
 void GpuManager::handleUdevEvent()
 {
     while (auto udevDevice = m_udevMonitor->getDevice()) {
+        if (udevDevice->action() == QLatin1StringView("change")) {
+            auto gpu = compatibleRenderDevice(udevDevice->devNum());
+            if (!gpu) {
+                continue;
+            }
+            const auto props = udevDevice->properties();
+            const auto it = props.find(QByteArrayLiteral("WEDGED"));
+            if (it == props.end()) {
+                continue;
+            }
+            const auto actions = it->split(',');
+            if (actions.isEmpty()) {
+                qCWarning(KWIN_CORE, "Got a WEDGED event without any actions?");
+                return;
+            }
+            qCWarning(KWIN_CORE) << "GPU" << gpu->name() << gpu->path() << "was wedged:" << actions;
+#if KWIN_BUILD_NOTIFICATIONS
+            // TODO add the app name once we can get that information
+            const auto sameNameCount = std::ranges::count(m_renderDevices, gpu->name(), &RenderDevice::name);
+            if (sameNameCount > 1) {
+                KNotification::event(QStringLiteral("graphicsreset"), i18nc("@info: status", "Graphics card “%1” (%2) was reset", gpu->name(), gpu->path()));
+            } else {
+                KNotification::event(QStringLiteral("graphicsreset"), i18nc("@info: status", "Graphics card “%1” was reset", gpu->name()));
+            }
+#endif
+            continue;
+        }
         int devNum = -1;
         const bool isPrimaryNode = sscanf(udevDevice->sysName().data(), DRM_PRIMARY_MINOR_NAME "%d", &devNum) == 1;
         if (isPrimaryNode) {