March 2026 - Wine-Bugs - list.winehq.org

[Bug 2948] WM_CTLCOLOREDIT & LISTBOX return ignored and pen bug
by WineHQ Bugzilla March 23, 2026

March 23, 2026

http://bugs.winehq.org/show_bug.cgi?id=2948 --- Comment #30 from KRosUser <kyle.kcsoftwares(a)gmail.com> --- Sorry, here is the correct link for a possible fix : https://github.com/reactos/reactos/commit/16a65a0df29f12e49d42d18e6ed23815f… -- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.

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[Bug 56780] New: Multiple games skip playing cutscenes (The Long Dark, The Room 4: Old Sins, Saint Kotar)
by WineHQ Bugzilla March 23, 2026

March 23, 2026

https://bugs.winehq.org/show_bug.cgi?id=56780 Bug ID: 56780 Summary: Multiple games skip playing cutscenes (The Long Dark, The Room 4: Old Sins, Saint Kotar) Product: Wine Version: 9.10 Hardware: x86-64 OS: Linux Status: NEW Severity: normal Priority: P2 Component: mfplat Assignee: wine-bugs(a)winehq.org Reporter: andrey.goosev(a)gmail.com Distribution: --- Continuation of bug 50983. 068c:fixme:mfplat:media_source_get_service_GetService Unsupported service {dd0ac3d8-40e3-4128-ac48-c0add067b714}. 068c:fixme:mfplat:MFPluginControl_IsDisabled (0 {88753b26-5b24-49bd-b2e7-0c445c78c982}) 068c:fixme:mfplat:MFPluginControl_GetPreferredClsidByIndex (0 0 00007FB6AC36F2B8 00007FB6AC36F2E0) 0718:fixme:mfplat:video_processor_ProcessMessage Ignoring message 0. 9.10-32-gb6abacbb7b0 -- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.

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[Bug 59550] New: Implement AppDefaults registry toggle for wcmd to sanitize forward slashes in execution paths (Resolves Unreal Engine update scripts)
by WineHQ Bugzilla March 23, 2026

March 23, 2026

http://bugs.winehq.org/show_bug.cgi?id=59550 Bug ID: 59550 Summary: Implement AppDefaults registry toggle for wcmd to sanitize forward slashes in execution paths (Resolves Unreal Engine update scripts) Product: Wine Version: 11.5 Hardware: arm OS: MacOS Status: UNCONFIRMED Severity: normal Priority: P2 Component: cmd Assignee: wine-bugs(a)list.winehq.org Reporter: smcclenahan(a)gmail.com Created attachment 80605 --> http://bugs.winehq.org/attachment.cgi?id=80605 wcmdmain.c Registry Hook for CmdForgiveSlashes Currently, wcmd strictly parses forward slashes (/) as command switches. When modern cross-platform engines (specifically Unreal Engine 4/5, e.g., Borderlands 4) attempt to launch background update scripts via cmd.exe /c, they frequently pass un-sanitized, mixed-slash paths (e.g., C:/users/.../PersistentDownloadDir/GbxRelaunch.bat). Because wcmd evaluates the slash as an invalid switch (e.g., /users), the execution fails instantly with an unrecognized command error. This breaks automatic game restarts and hotfix pipelines for numerous titles. (See attached terminal_output.txt for the exact error). Proposed Solution: Introduce an opt-in registry toggle within the AppDefaults hive that allows wcmd to sanitize forward slashes to backslashes for specific calling executables before parsing. * Registry Key: HKCU\Software\Wine\AppDefaults\[CallingProcess.exe] * Proposed Value: "CmdForgiveSlashes"="1" (String or DWORD) * Behavior: When wcmd is spawned, it checks the AppDefaults of the parent process. If the flag is present, a lightweight sanitization routine converts / to \ in the execution buffer before the standard wcmd parsing logic takes over. Architectural Rationale & Preempting Regressions: * Zero Regression Blast Radius: By defaulting to strict legacy parsing and requiring an explicit AppDefaults override, there is zero risk to legacy enterprise scripts, background redistributables, or unrelated software within the same WINEPREFIX. The execution state remains entirely deterministic. * Avoiding Hardcoded Hacks: This prevents the need to continuously merge game-specific string exceptions into the core wcmdmain.c codebase as new games release. * Empowering Downstream Wrappers: Native Windows cmd.exe occasionally relies on undocumented, dynamic heuristics to successfully execute these mixed-slash paths. Perfectly cloning those undocumented heuristics in wcmd is dangerous for legacy stability. Exposing this registry hook gives downstream maintainers (like Proton and CrossOver) a safe, standardized way to configure the environment via their own application profiles without patching Wine's core C code. (Proof of concept patch attached as wcmd_forgive_slashes.patch) -- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.

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[Bug 59556] New: GetSystemInfo returns host CPU count ignoring cgroup CPU limits inside containers (Yomawari: Lost in the Dark)
by WineHQ Bugzilla March 22, 2026

March 22, 2026

http://bugs.winehq.org/show_bug.cgi?id=59556 Bug ID: 59556 Summary: GetSystemInfo returns host CPU count ignoring cgroup CPU limits inside containers (Yomawari: Lost in the Dark) Product: Wine Version: 11.5 Hardware: x86-64 OS: Linux Status: UNCONFIRMED Severity: normal Priority: P2 Component: ntdll Assignee: wine-bugs(a)list.winehq.org Reporter: castaneai(a)castaneai.net Distribution: --- GetSystemInfo returns the host machine's full processor count (dwNumberOfProcessors) even when running inside a Linux container with cgroup CPU limits applied. For example, on a 16-core host with a container limited to 2 CPUs via "docker run --cpus=2", GetSystemInfo still reports 16 processors. Steps to reproduce: 1. Run Wine inside a Docker container with CPU limits: docker run --cpus=2 <wine-image> wine cmd /c "echo %NUMBER_OF_PROCESSORS%" 2. Observe that the reported processor count matches the host, not the cgroup limit. Expected results: The processor count should reflect the cgroup CPU limit (2 in this example), consistent with the behavior of `nproc` from GNU coreutils (version >= 9.8). Actual results: The processor count matches the host machine's total CPU count (e.g. 16). This affects applications that scale their behavior based on the reported processor count. Yomawari: Lost in the Dark (https://store.steampowered.com/app/1998330/) for instance, shows significant performance degradation when run in a CPU-limited container. Hot-patching GetSystemInfo to return the cgroup-limited CPU count resolved the issue, suggesting the game relies on this value to determine its thread count or workload distribution. Wine's `init_cpu_info()` in dlls/ntdll/unix/system.c uses `sysconf(_SC_NPROCESSORS_ONLN)`, which returns the host CPU count and does not account for cgroup v1/v2 CPU quotas (`cpu.max` / `cpu.cfs_quota_us`). GNU coreutils 9.8 (September 2025) added the same kind of cgroup v2 awareness to nproc: https://github.com/coreutils/coreutils/issues/108 Tested with Wine 11.5, Arch Linux, Docker with --cpus flag. -- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.

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[Bug 54606] New: 64-bit LDAP Administrator crashes on unimplemented function RPCRT4.dll.NdrStubCall3
by WineHQ Bugzilla March 22, 2026

March 22, 2026

https://bugs.winehq.org/show_bug.cgi?id=54606 Bug ID: 54606 Summary: 64-bit LDAP Administrator crashes on unimplemented function RPCRT4.dll.NdrStubCall3 Product: Wine Version: 8.2 Hardware: x86-64 OS: Linux Status: NEW Severity: normal Priority: P2 Component: rpc Assignee: wine-bugs(a)winehq.org Reporter: alexhenrie24(a)gmail.com Distribution: --- Created attachment 74136 --> https://bugs.winehq.org/attachment.cgi?id=74136 Console output The 32-bit version also crashes, but in a different way. What's weird is that NdrStubCall3 does not appear to be exported by rpcrt4.dll on Windows, but there is documentation for it at https://learn.microsoft.com/en-us/windows/win32/api/rpcndr/nf-rpcndr-ndrstu… $ sha256sum ldapadmin-4.21.24429.0-x64-eng.msi 709d1176c9b615db0592dd21f4f2331c8757adde16a711e8e69c1486673fbfa6 -- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.

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[Bug 58254] New: Clip Studio Paint 4 shuts down immediately when using compatibility mode for Windows 10 or 11.
by WineHQ Bugzilla March 22, 2026

March 22, 2026

http://bugs.winehq.org/show_bug.cgi?id=58254 Bug ID: 58254 Summary: Clip Studio Paint 4 shuts down immediately when using compatibility mode for Windows 10 or 11. Product: Wine Version: 10.0 Hardware: x86-64 OS: Linux Status: UNCONFIRMED Severity: normal Priority: P2 Component: -unknown Assignee: wine-bugs(a)winehq.org Reporter: mar.asdoria(a)gmail.com Distribution: --- Created attachment 78597 --> http://bugs.winehq.org/attachment.cgi?id=78597 backtrace file In Operating System: Kubuntu 25.04 Kernel Version: 6.14.0-15-generic (64-bit) Using Clip Studio Paint 4: https://www.clipstudio.net/en/dl/ (Free trial download) The program manages to launch, displays a black screen and then crashes with the error code "winedbg attached to pid 0408" on the console as the only prompt. The program works well under compatibility mode for Windows 8.1, including all app features (excluding the Asset store), menus, filters and 3D tools. -- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.

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[Bug 58315] New: Clip Studio Paint 4 menus turn black when clicked
by WineHQ Bugzilla March 22, 2026

March 22, 2026

http://bugs.winehq.org/show_bug.cgi?id=58315 Bug ID: 58315 Summary: Clip Studio Paint 4 menus turn black when clicked Product: Wine Version: 10.9 Hardware: x86-64 OS: Linux Status: UNCONFIRMED Severity: normal Priority: P2 Component: -unknown Assignee: wine-bugs(a)winehq.org Reporter: michelpereira4410(a)gmail.com Distribution: --- Created attachment 78673 --> http://bugs.winehq.org/attachment.cgi?id=78673 Wine debug d3d + normal log Clip Studio Paint on Wine (version X.Y) exhibits a rendering issue where certain UI components — specifically the Settings window and the Login window — appear completely black when opened. Despite the lack of visible content, the menus remain clickable and functional if the user knows where to click. This behavior makes it extremely difficult to use those parts of the application effectively. -- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.

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[Bug 49927] New: Prince of Persia Sands Of Time Graphic Bug
by WineHQ Bugzilla March 22, 2026

March 22, 2026

https://bugs.winehq.org/show_bug.cgi?id=49927 Bug ID: 49927 Summary: Prince of Persia Sands Of Time Graphic Bug Product: Wine Version: 5.18 Hardware: x86-64 OS: Linux Status: UNCONFIRMED Severity: normal Priority: P2 Component: -unknown Assignee: wine-bugs(a)winehq.org Reporter: SolisX007(a)yahoo.com Distribution: --- Created attachment 68309 --> https://bugs.winehq.org/attachment.cgi?id=68309 POP-blacklines Prince of Persia Sands Of Time Graphic Bug where it shows two black lines that follow the character around on wine-5.18 nvidia proprietary driver. I will upload a screenshot of the issue. This was tested in a clean wine prefix. -- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.

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[Bug 59088] New: Authentication error with EWS / .NET4.8
by WineHQ Bugzilla March 22, 2026

March 22, 2026

http://bugs.winehq.org/show_bug.cgi?id=59088 Bug ID: 59088 Summary: Authentication error with EWS / .NET4.8 Product: Wine Version: 10.20 Hardware: x86-64 OS: Linux Status: UNCONFIRMED Severity: normal Priority: P2 Component: -unknown Assignee: wine-bugs(a)list.winehq.org Reporter: andreas.franz(a)arcor.de Distribution: --- Created attachment 79875 --> http://bugs.winehq.org/attachment.cgi?id=79875 .NET-Exception I've got an application which uses Microsoft-EWS (Exchange-Web-Services) to retrieve emails from specific mailbox. I'm getting an exception - see attachment. Same machine on real Windows 11: Everything is fine. Maybe some crypto-thing? Any workaround / debug possible? regards, Andy -- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.

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[Bug 48722] New: wine 5.0 : ACAD 14 : Will not run setup.exe
by WineHQ Bugzilla March 22, 2026

March 22, 2026

https://bugs.winehq.org/show_bug.cgi?id=48722 Bug ID: 48722 Summary: wine 5.0 : ACAD 14 : Will not run setup.exe Product: Wine Version: 5.0 Hardware: x86 OS: Linux Status: UNCONFIRMED Severity: critical Priority: P2 Component: -unknown Assignee: wine-bugs(a)winehq.org Reporter: sdegroff(a)centurylink.net Distribution: --- Created attachment 66597 --> https://bugs.winehq.org/attachment.cgi?id=66597 Failure to Install AutoCAD 14 Failure to install AutoCAD 14. Seems to be missing some components. Will not run AutoCad "setup.exe" -- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.

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