I can confirm that libgtk-3-0 3.24.20-0ubuntu1.1 from focal-proposed fixes the rendering issue.
I have tested with: 1) the attached minimal test case: gcc -o testcase testcase.c `pkg-config --cflags --libs gtk+-3.0` ./testcase 2) a full-blown flutter app: snap install --classic flutter flutter config --enable-linux-desktop flutter create test_app cd test_app flutter run ** Tags removed: verification-needed verification-needed-focal ** Tags added: verification-done-focal -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1960947 Title: Graphical issues for GtKGL in software rendering To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gtk+3.0/+bug/1960947/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
