diff options
Diffstat (limited to 'src/plugins/platforms/xcb/qxcbscreen.cpp')
| -rw-r--r-- | src/plugins/platforms/xcb/qxcbscreen.cpp | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/src/plugins/platforms/xcb/qxcbscreen.cpp b/src/plugins/platforms/xcb/qxcbscreen.cpp index 8b01b4389f..c93b4863e1 100644 --- a/src/plugins/platforms/xcb/qxcbscreen.cpp +++ b/src/plugins/platforms/xcb/qxcbscreen.cpp @@ -1,8 +1,7 @@ /**************************************************************************** ** ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). -** All rights reserved. -** Contact: Nokia Corporation (qt-info@nokia.com) +** Contact: http://www.qt-project.org/ ** ** This file is part of the plugins of the Qt Toolkit. ** @@ -35,6 +34,7 @@ ** ** ** +** ** $QT_END_LICENSE$ ** ****************************************************************************/ @@ -108,7 +108,11 @@ QXcbScreen::QXcbScreen(QXcbConnection *connection, xcb_screen_t *screen, int num free(reply); - m_syncRequestSupported = m_windowManagerName != QLatin1String("KWin"); + const xcb_query_extension_reply_t *sync_reply = xcb_get_extension_data(xcb_connection(), &xcb_sync_id); + if (!sync_reply || !sync_reply->present) + m_syncRequestSupported = false; + else + m_syncRequestSupported = m_windowManagerName != QLatin1String("KWin"); m_clientLeader = xcb_generate_id(xcb_connection()); Q_XCB_CALL2(xcb_create_window(xcb_connection(), |