diff --git a/0001-Disable-the-seccomp-sandbox.patch b/0001-Disable-the-seccomp-sandbox.patch
new file mode 100644
index 0000000..e791915
--- /dev/null
+++ b/0001-Disable-the-seccomp-sandbox.patch
@@ -0,0 +1,51 @@
+From cd2d031b191c6b4e6a0eb4bd51ed8b2c72c21f76 Mon Sep 17 00:00:00 2001
+From: Fabian Vogt <fabian@ritter-vogt.de>
+Date: Fri, 24 Jul 2020 13:22:50 +0200
+Subject: [PATCH] Disable the seccomp sandbox
+References: boo#1174448
+
+In the referenced bug, it somehow fails to make the created context current,
+so no GL vendor detection is performed and it is assumed to not be Nvidia
+or on Wayland. This breaks rendering.
+While it would be enough to only disable the sandbox in this particular case,
+it's planned to drop sandboxing anyway
+(https://invent.kde.org/plasma/kscreenlocker/-/merge_requests/9) so just do the
+same here, just in a simpler way with less side effects.
+---
+ greeter/seccomp_filter.cpp | 8 ++++++++
+ 1 file changed, 8 insertions(+)
+
+diff --git a/greeter/seccomp_filter.cpp b/greeter/seccomp_filter.cpp
+index bca3001..8e2f156 100644
+--- a/greeter/seccomp_filter.cpp
++++ b/greeter/seccomp_filter.cpp
+@@ -28,6 +28,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ #include <QDBusConnection>
+ #include <QOpenGLContext>
+ #include <QOffscreenSurface>
++#include <QDebug>
+ 
+ #include <seccomp.h>
+ #include <sys/socket.h>
+@@ -62,11 +63,18 @@ void init()
+             else if (gl->isSoftwareEmulation() && KWindowSystem::isPlatformWayland()) {
+                 createSupported = writeSupported = false;
+             }
++        } else {
++            qWarning() << "Making the context current failed";
++            return;
+         }
++    } else {
++        qWarning() << "Creating an offscreen context failed";
++        return;
+     }
+ 
+     // access DBus to have the socket open
+     QDBusConnection::sessionBus();
++    return;
+ 
+     // default action: allow
+     // we cannot use a whitelist approach of syscalls
+-- 
+2.25.1
+
diff --git a/kscreenlocker.changes b/kscreenlocker.changes
index ddd7ea2..1858de3 100644
--- a/kscreenlocker.changes
+++ b/kscreenlocker.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Fri Jul 24 11:24:06 UTC 2020 - Fabian Vogt <fabian@ritter-vogt.de>
+
+- Add patch to disable the seccomp sandbox (boo#1174448):
+  * 0001-Disable-the-seccomp-sandbox.patch
+
 -------------------------------------------------------------------
 Tue Jul  7 12:38:54 UTC 2020 - Fabian Vogt <fabian@ritter-vogt.de>
 
diff --git a/kscreenlocker.spec b/kscreenlocker.spec
index 2a8a4d7..62c3037 100644
--- a/kscreenlocker.spec
+++ b/kscreenlocker.spec
@@ -32,6 +32,8 @@ Source1:        https://download.kde.org/stable/plasma/%{version}/kscreenlocker-
 Source2:        plasma.keyring
 %endif
 Source3:        kde
+# PATCH-FIX-UPSTREAM (kind of, https://invent.kde.org/plasma/kscreenlocker/-/merge_requests/9)
+Patch1:         0001-Disable-the-seccomp-sandbox.patch
 BuildRequires:  cmake >= 2.8.12
 BuildRequires:  extra-cmake-modules >= 1.8.0
 BuildRequires:  kf5-filesystem
@@ -86,8 +88,9 @@ Requires:       cmake(Qt5X11Extras) >= 5.5.0
 Development files for Library and components for secure lock screen architecture.
 
 %lang_package
+
 %prep
-%setup -q -n %{name}-%{version}
+%autosetup -p1 -n %{name}-%{version}
 
 %build
   %cmake_kf5 -d build -- -DKDE4_COMMON_PAM_SERVICE=kde -DCMAKE_INSTALL_LOCALEDIR=%{_kf5_localedir}