8280991: [XWayland] No displayChanged event after setDisplayMode call

[azvegint]

Hi all,

This pull request contains a backport of commit 29de20db from the openjdk/jdk repository.

It was not clean due to the conflict in the copyright year, (in 25 it was updated separately by openjdk/jdk@64fad1c)

The commit being backported was authored by Alexander Zvegintsev on 4 Mar 2025 and was reviewed by Harshitha Onkar and Phil Race.

Thanks!

---

Progress

• Change must not contain extraneous whitespace
• JDK-8280991 needs maintainer approval
• Commit message must refer to an issue

Issue

• JDK-8280991: [XWayland] No displayChanged event after setDisplayMode call (Bug - P3 - Approved)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk24u.git pull/111/head:pull/111
$ git checkout pull/111

Update a local copy of the PR:
$ git checkout pull/111
$ git pull https://git.openjdk.org/jdk24u.git pull/111/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 111

View PR using the GUI difftool:
$ git pr show -t 111

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk24u/pull/111.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back azvegint! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

@azvegint This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

8280991: [XWayland] No displayChanged event after setDisplayMode call

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been 6 new commits pushed to the master branch:

• 0ceff4b: 8349637: Integer.numberOfLeadingZeros outputs incorrectly in certain cases
• 320ce2f: 8350201: Out of bounds access on Linux aarch64 in os::print_register_info
• 23389d0: 8350483: AArch64: turn on signum intrinsics by default on Ampere CPUs
• 1603de1: 8342524: Use latch in AbstractButton/bug6298940.java instead of delay
• 33960cf: 8344581: [TESTBUG] java/awt/Robot/ScreenCaptureRobotTest.java failing on macOS
• 6109c0b: 8351033: RISC-V: TestFloat16ScalarOperations asserts with offset (4210) is too large to be patched in one beq/bge/bgeu/blt/bltu/bne instruction!

Please see this link for an up-to-date comparison between the source branch of this pull request and the master branch.
As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

➡️ To integrate this PR with the above commit message to the master branch, type /integrate in a new comment.

[openjdk]

This backport pull request has now been updated with issue from the original commit.

[openjdk]

⚠️ @azvegint This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.

[mlbridge]

Webrevs

• 00: Full (14db0c7e)

[azvegint]

/approval request

Clean backport to support correct emulated screen resolution switching in XWayland.

[openjdk]

@azvegint
8280991: The approval request has been created successfully.

[azvegint]

/integrate

[openjdk]

Going to push as commit 31a383a.
Since your change was applied there have been 7 commits pushed to the master branch:

• f2ffbbd: 8349623: [ASAN] Gtest os_linux.glibc_mallinfo_wrapper_vm fails
• 0ceff4b: 8349637: Integer.numberOfLeadingZeros outputs incorrectly in certain cases
• 320ce2f: 8350201: Out of bounds access on Linux aarch64 in os::print_register_info
• 23389d0: 8350483: AArch64: turn on signum intrinsics by default on Ampere CPUs
• 1603de1: 8342524: Use latch in AbstractButton/bug6298940.java instead of delay
• 33960cf: 8344581: [TESTBUG] java/awt/Robot/ScreenCaptureRobotTest.java failing on macOS
• 6109c0b: 8351033: RISC-V: TestFloat16ScalarOperations asserts with offset (4210) is too large to be patched in one beq/bge/bgeu/blt/bltu/bne instruction!

Your commit was automatically rebased without conflicts.

[openjdk]

@azvegint Pushed as commit 31a383a.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.