Qt报错:qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch).....

Qt报错:qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch)…

环境：
ubuntu18.04
qt5.12.12
Qt-Advanced-Docking-System

现象
Qt-Advanced-Docking-System控件显示异常。刷新有问题。当出问题时，应用程序输出栏一直打印如下信息

qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 770, resource id: 136314920, major code: 130 (Unknown), minor code: 3
qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 935, resource id: 136314920, major code: 130 (Unknown), minor code: 3
qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 1010, resource id: 136314920, major code: 130 (Unknown), minor code: 3
qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 1059, resource id: 136314920, major code: 130 (Unknown), minor code: 3
qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 1070, resource id: 136314920, major code: 130 (Unknown), minor code: 3
qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 1211, resource id: 136314982, major code: 130 (Unknown), minor code: 3
qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 1349, resource id: 136314996, major code: 130 (Unknown), minor code: 3
qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 1583, resource id: 136315025, major code: 130 (Unknown), minor code: 3
qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 1790, resource id: 136315025, major code: 130 (Unknown), minor code: 3
qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 1839, resource id: 136315025, major code: 130 (Unknown), minor code: 3
qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 1850, resource id: 136315025, major code: 130 (Unknown), minor code: 3
qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 1978, resource id: 136315074, major code: 130 (Unknown), minor code: 3
qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 2112, resource id: 136315088, major code: 130 (Unknown), minor code: 3
qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 2343, resource id: 136315113, major code: 130 (Unknown), minor code: 3
qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 2538, resource id: 136315113, major code: 130 (Unknown), minor code: 3
qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 2587, resource id: 136315113, major code: 130 (Unknown), minor code: 3
qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 2598, resource id: 136315113, major code: 130 (Unknown), minor code: 3
qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 2744, resource id: 136315164, major code: 130 (Unknown), minor code: 3
qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 2878, resource id: 136315178, major code: 130 (Unknown), minor cod

原因
1 网上大多数说是xcb动态库的问题。我仔细检查了xcb动态库是正常的。
2 通过代码回滚，发现是设置了setAttribute(Qt::WA_TranslucentBackground)造成的。