RFR: 8280482: Window transparency bug on Linux [v3]

[Alexander Zvegintsev]

On Fri, 28 Jul 2023 11:17:42 GMT, Tejesh R <tr at openjdk.org> wrote:

>> I don't see why we should be limited to only two when more may be available.
>> What if it helps to find some issue?
>> Anyway, the test place windows on all screens, but checking only on two of them.
>
> I have updated the test to available screens (Though not able to test since I can extend to two screens now), I guess it should work, it's generic now.

FYI, you can arrange up to 8 screens using Virtual Box(but I don't think it's necessary in this case)

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PR Review Comment: https://git.openjdk.org/jdk/pull/14825#discussion_r1277456027