This is reproducible every time. I thought it was KWin but Openbox led me to plasmashell as the culprit. If I start up a game e.g., Left 4 Dead 2 through Steam with vsync enabled, all is well. The moment I alt+tab out of the game and return to it, there is tearing that I just can't get rid of until I kill plasmashell. Reproducible: Always Steps to Reproduce: 1. Open a game e.g., Left 4 Dead 2, Team Fortress 2 2. If vsync is enabled, it's respected as long as you don't lose focus of the game 3. Alt+Tab out of the game and return to it Actual Results: Even if vsync was enabled and was working, it appears to no longer work as tearing becomes constant. Expected Results: No tearing. I can work around this by killing plasmashell. If I kill it, the game is tear free again. I actually created a shortcut of "killall plasmashell" and it works a charm. I just wish I didn't need the shortcut :)
I can confirm that it's still happening on Kubuntu 16.04.
Thanks for the reports. Is it possible for one or both of you to please test and confirm if this issue is still occurring or if this bug report can be marked as resolved. I've set the bug status to "needsinfo" pending your response, please change back to "reported" or "resolved" when you respond, thanks.
Unfortunately I can no longer test as I've moved to Manjaro which never suffered from tearing. As far as I am concerned, KDE Plasma on Manjaro is amazing right our of the box (granted some minor bugs and annoyances). Sorry I can no longer help with this 5 year old issue :(
(In reply to Victor B. Gonzalez from comment #3) > Unfortunately I can no longer test as I've moved to Manjaro which never > suffered from tearing. As far as I am concerned, KDE Plasma on Manjaro is > amazing right our of the box (granted some minor bugs and annoyances). > > Sorry I can no longer help with this 5 year old issue :( Thanks for the info, I'll see if lehmax replies on this one, if not we'll close it out.
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!