SUMMARY When using kwin commands such as./kwin_wayland --xwayland --drm --no-lockscreen startdde dde-launcher, only the damage region is updated on a black background My guess is that 1) in SceneOpenGL::paint function, using prepareRenderingForScreen (egl_gbm_backend class) to obtain the QRegion repaint is 0, cause paintScreen function for paint only a region of the screen, and did not send the whole screen, the other opengl or x11 return the whole screen. 2) EGL_SWAP_BEHAVIOR was changed to EGL_BUFFER_PRESERVED when the surface was created by egl, which can be displayed normally. SOFTWARE/OS VERSIONS KDE Frameworks Version: Qt Version: 5.11.3 ADDITIONAL INFORMATION
It seems like you use 5.15.4, which is no longer supported by KDE. Are you able to reproduce this bug in 5.17?
Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging If you have already provided the requested information, please mark the bug as REPORTED so that the KDE team knows that the bug is ready to be confirmed. Thank you for helping us make KDE software even better for everyone!
This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!