This is happening in linux where `BuffereStrategyPaintManager` is used to paint to offscreen. Here `bsg` bufferStrategy SunGraphics2D is used to paint to offscreen where the background is not refreshed, which does only clipping and then paints to offscreen. In order to handle the screen updated/clear the buffer, `setBackground` to component background color and `clearRect` against the clip area is used which solves the issue without causing any regression. CI is green for the fix and manual test is provided.
------------- Commit messages: - Linux tag added - fix + manual test Changes: https://git.openjdk.org/jdk/pull/17081/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17081&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8187759 Stats: 139 lines in 2 files changed: 139 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/17081.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/17081/head:pull/17081 PR: https://git.openjdk.org/jdk/pull/17081
