September 2025 - Wine-bugs - list.winehq.org

[Bug 58662] New: 16-bit bitmap rendering
by WineHQ Bugzilla 19 Sep '25

19 Sep '25

http://bugs.winehq.org/show_bug.cgi?id=58662 Bug ID: 58662 Summary: 16-bit bitmap rendering Product: Wine Version: 10.14 Hardware: x86-64 OS: Linux Status: UNCONFIRMED Severity: normal Priority: P2 Component: opengl Assignee: wine-bugs(a)winehq.org Reporter: zowie+wine(a)vandillen.io Distribution: --- Created attachment 79243 --> http://bugs.winehq.org/attachment.cgi?id=79243 Glitchy 16-bit render of Civilization 3. Without OpenGL Civ 3 does not have visible glitches. I've added a new test earlier today for 16-bit bitmap rendering with wGL [1]. In conclusion, it's pretty broken. The solution to this problem isn't trivial, so I'm opening this issue for discussion. On Windows, when wglChoosePixelFormat is called with the flag `PFD_DRAW_TO_BITMAP` and `cColorBits = 16`, you'll be given a pixel format with r5g5b5a1 (except that the alpha bit is somewhat quirky). This gives you a software rendered OpenGL context for OpenGL 1.1 [2]. On Wine, asking for a 16-bit pixel format gets you nothing, because all 16-bit pixel formats with the DRAW_TO_BITMAP are required to have an alpha bit in Wine and none of the pixel formats on my Nvidia driver actually have an alpha bit (there's only r5g6b5 and r16). The alpha bit requirement was introduced recently in MR !8392 [3]. It's worth noting that not getting a pixel format — although it's wrong — actually works pretty well for Civilization 3 (see “relevant software” section). Removing the check for an alpha bit, Wine will be able to find a 16 bit pixel format again, but you'll get unusably bad renders (screenshots in the attachments). Some observations on the screenshots: - You can see alternating vertical black/blue and orange/white/yellow lines every horizontal pixel. - Blue pixels appear in the black lines, but they're rare. I only see blue pixels in the text in the SimGolf screenshot. - The render buffer doesn't seem to be getting cleared (pretty apparent in Civilization 3: the old squares were sticking around) - Zooming in, you can see that there aren't only vertical lines, but also horizontal lines (see zoomed-in screenshot). My theory is that there's two problems: - Wine is probably putting 32-bit-per-pixel renders into the 16-bit-per-pixel bitmaps. This explains the vertical & horizontal lines. I'm guessing there's also some memory corruption as a consequence: It's presumably overwriting twice as much bitmap memory as it should. - The right pixel format just doesn't exist. The format r5g5b5a1 is not something that is actually implemented on hardware (at least not anymore), it's just a quirky Windows software renderer thing. The second point is a bit troublesome because I don't see any easy workarounds. The most obvious solution is to make an OpenGL 1.1 software renderer of our own. Alternatively, it might be possible to simulate the behaviour by using a 32-bits-per-pixel OpenGL context. Whenever glFinish is called, we could download the render to a "secret" Wine-internal bitmap that's also 32 bpp and then overwrite the 16 bpp bitmap based on the pixels of the 32 bpp bitmap. I'm not sure how reliable that is. Looking at the OpenGL 1.1 reference [4], I think making an OpenGL 1.1 software renderer could be a fun project, but the other solution definitely seems like less effort. I've only been involved in Wine for seven days though, so I'll defer the decision to senior maintainers. [1] https://gitlab.winehq.org/wine/wine/-/merge_requests/8888 [2] https://www.khronos.org/opengl/wiki/Platform_specifics:_Windows#PFD_DRAW_TO… [3] https://gitlab.winehq.org/wine/wine/-/merge_requests/8392 [4] https://www.talisman.org/opengl-1.1/Reference.html --- Relevant software (screenshots in attachments) - Sid Meier's SimGolf (demo: https://archive.org/details/Simgolfdemo) In SimGolf, a 16-bit DRAW_TO_BITMAP OpenGL context seems to be used for drawing the terrain. Currently, the terrain renders as black. - Sid Meier's Civilization 3 In Civilization 3, it seems that 16-bit bitmap rendering is used to draw an outline for the movement range of a selected unit (that's just a guess. It draws a square when a unit is selected but I haven't seen it without glitches). It's notable that Civilization 3 currently works fine. Because wglChoosePixelFormat doesn't find a 16-bit pixel format, the `null_gl` implementation is being used right now. That works out pretty well because the movement range outline isn't something you miss when you don't know it's supposed to be there. --- Relevant bugs: Sid Meier's SimGolf does not render properly | https://bugs.winehq.org/show_bug.cgi?id=50876 Civilization III Complete shows black terrain (Wine compiled with OSMesa support) | https://bugs.winehq.org/show_bug.cgi?id=41930 -- 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.

1 9

[Bug 48548] New: Support running multiple tests in submitted jobs
by WineHQ Bugzilla 18 Sep '25

18 Sep '25

https://bugs.winehq.org/show_bug.cgi?id=48548 Bug ID: 48548 Summary: Support running multiple tests in submitted jobs Product: Wine-Testbot Version: unspecified Hardware: Other OS: other Status: UNCONFIRMED Severity: normal Priority: P2 Component: unknown Assignee: wine-bugs(a)winehq.org Reporter: cdavis5x(a)gmail.com When I submit a job manually on the testbot, I can only run one instance of one executable. For a binary, this makes sense, since there's only one binary; but a patch, for which a choice of Wine test executables is offered, can affect multiple Wine unit tests. I then have to submit the job multiple times, one for each test unit affected. This seems... suboptimal. It'd be much faster and more convenient if I could run multiple tests in a single job. -- 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.

1 1

[Bug 58714] New: Textbox area got strikethroughed, despite working normal on Windows.
by WineHQ Bugzilla 18 Sep '25

18 Sep '25

http://bugs.winehq.org/show_bug.cgi?id=58714 Bug ID: 58714 Summary: Textbox area got strikethroughed, despite working normal on Windows. 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: 44ww0wok0k404cc0cgc84ko04kw8ow04(a)ai.notifier.in Distribution: --- Created attachment 79314 --> http://bugs.winehq.org/attachment.cgi?id=79314 EXE > BUG Wine failed to display textbox text properly. All text displayed in textbox result in strikethroughed and not selectable. On Windows, the textbox is functionable. > PROCEDURE 1. Save both "__XML File Finder for The Sims 4.exe" and "XML File Index.txt" to Desktop (e.g., /home/you/Desktop) 2. Run "wine __XML.....exe" 3. Click "Browse" and select the txt file. 4. In "Search for" area, input "walk". > EXPECTED RESULT Working textbox. > ACTUAL RESULT Textbox is not working and strikethroughed. -- 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.

1 1

[Bug 56059] New: Overwatch 2: highlight saving generates a 1ms (empty) webm video file
by WineHQ Bugzilla 18 Sep '25

18 Sep '25

https://bugs.winehq.org/show_bug.cgi?id=56059 Bug ID: 56059 Summary: Overwatch 2: highlight saving generates a 1ms (empty) webm video file Product: Wine Version: 9.0-rc2 Hardware: x86-64 OS: Linux Status: UNCONFIRMED Severity: normal Priority: P2 Component: -unknown Assignee: wine-bugs(a)winehq.org Reporter: forestix(a)nom.one Distribution: --- Created attachment 75715 --> https://bugs.winehq.org/attachment.cgi?id=75715 example video file When attempting to save a game highlight as a webm video file, Overwatch 2 *seems* to be encoding the video as it should, in that it uses the CPU and takes an appropriate amount of time to complete. However, the resulting file is only about 700K, and doesn't play in any player. Examining the file with MediaInfo shows what looks like a reasonable container with video and audio parts, but only 1ms duration. I get the same results in all of these Wine versions: wine-9.0-rc2 wine-9.0-rc2 (Staging) wine-ge-custom (aka lutris-GE-Proton) 8-23 Game installer download link: https://download.battle.net/en-us?product=ow&blzcmp=ow_gamesite Steps to reproduce: - play a game (easiest way is via Play: Training: Practice vs. AI: Casual) - after the game is over, return to the main menu - click username button (top right corner) - click history tab (top edge) - click highlights tab (left edge) - click a highlight from "today's top 5" - click save button (bottom edge) - select movie format: webm - click save button -- 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.

1 9

[Bug 56137] New: Overwatch 2 fails to save highlight video files
by WineHQ Bugzilla 17 Sep '25

17 Sep '25

https://bugs.winehq.org/show_bug.cgi?id=56137 Bug ID: 56137 Summary: Overwatch 2 fails to save highlight video files Product: Wine Version: 9.0-rc2 Hardware: x86-64 OS: Linux Status: UNCONFIRMED Severity: normal Priority: P2 Component: -unknown Assignee: wine-bugs(a)winehq.org Reporter: forestix(a)nom.one Distribution: --- When attempting to save an Overwatch 2 highlight video as an mp4 file (the default format), it fails with this error message: SAVING ERROR An unknown error has occurred. (6-04) Steps to reproduce: - play a game (easiest way is via Play: Training: Practice vs. AI: Casual) - after the game is over, return to the main menu - click username button (top right corner) - click history tab (top edge) - click highlights tab (left edge) - click a highlight from "today's top 5" - click save button (bottom edge) - select movie format: mp4 - click save button Note that this is a different kind of failure than the one with .webm format (bug 56059). -- 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.

1 5

[Bug 58707] New: infinite blocking on reading piped stderr
by WineHQ Bugzilla 17 Sep '25

17 Sep '25

http://bugs.winehq.org/show_bug.cgi?id=58707 Bug ID: 58707 Summary: infinite blocking on reading piped stderr Product: Wine Version: 10.14 Hardware: x86-64 OS: Linux Status: UNCONFIRMED Severity: normal Priority: P2 Component: wineserver Assignee: wine-bugs(a)winehq.org Reporter: sewn(a)disroot.org Distribution: --- Created attachment 79307 --> http://bugs.winehq.org/attachment.cgi?id=79307 C program that runs the Wine program 'reg', reading its stderr and discarding it. When a wine program is ran with its stderr piped and read, the program hangs forever for as long as the wineserver is, which can be further tested by running 'wineserver' with a large persistence value. This causes programs that are ran software that wraps around wine to block until wineserver exits. An example program that shows this behavior occuring is attached. Wineserver can be ran seperately with a high persistence to showcase the "hanging". -- 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.

1 2

[Bug 58078] New: StarCraft Remastered: game is not started with wine-10.5
by WineHQ Bugzilla 17 Sep '25

17 Sep '25

https://bugs.winehq.org/show_bug.cgi?id=58078 Bug ID: 58078 Summary: StarCraft Remastered: game is not started with wine-10.5 Product: Wine-staging Version: 10.5 Hardware: x86-64 OS: Linux Status: UNCONFIRMED Severity: normal Priority: P2 Component: -unknown Assignee: wine-bugs(a)winehq.org Reporter: dimich.dmb(a)gmail.com CC: leslie_alistair(a)hotmail.com, z.figura12(a)gmail.com Distribution: --- The game is not started with wine-10.5 StarCraft.exe process is running and consuming 100% of one CPU core. No video mode changed, no game window created. Battle.net launcher is displaying StartCraft as "Playing Now". After downgrading wine to 10.4 the game starts and works fine. StartCraft: v1.23.10.13515 OS: Arch Linux Kernel v6.14.1 GPU: Nvidia, proprietary driver v570.133.07 -- 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.

1 11

[Bug 58708] New: Internet Download Manager: Right-clicking in empty list of downloads displays context menu in wrong position
by WineHQ Bugzilla 17 Sep '25

17 Sep '25

http://bugs.winehq.org/show_bug.cgi?id=58708 Bug ID: 58708 Summary: Internet Download Manager: Right-clicking in empty list of downloads displays context menu in wrong position Product: Wine Version: 10.14 Hardware: x86-64 URL: https://mirror2.internetdownloadmanager.com/idman642bu ild43.exe OS: MacOS Status: UNCONFIRMED Severity: normal Priority: P2 Component: -unknown Assignee: wine-bugs(a)winehq.org Reporter: tobbi.bugs(a)googlemail.com I cannot tell if this is a problem with Internet Download Manager or with Wine. Anyway: Steps to reproduce: 1. Download and install "Internet Download Manager". 2. Open IDM and right-click inside the empty list of downloads. Expected results: Context menu opens near the mouse pointer. Actual results: Context menu opens in the center of the list. % openssl sha256 idman642build43.exe SHA2-256(idman642build43.exe)= 3f79c4f6451e76bfad0236c9523bb827b14d3ce87c589f2b8aca58210ecf9a2c -- 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.

1 1

[Bug 58702] New: Update to 10.15 breaks Bricklink Studio
by WineHQ Bugzilla 17 Sep '25

17 Sep '25

http://bugs.winehq.org/show_bug.cgi?id=58702 Bug ID: 58702 Summary: Update to 10.15 breaks Bricklink Studio Product: Wine Version: 10.15 Hardware: x86-64 OS: Linux Status: UNCONFIRMED Severity: normal Priority: P2 Component: -unknown Assignee: wine-bugs(a)winehq.org Reporter: bonizak(a)gmail.com Distribution: --- Created attachment 79304 --> http://bugs.winehq.org/attachment.cgi?id=79304 wine backtrace file Bricklink's Studio Version 2.25.8_1, was running fine under 10.14 dev but the update to 10.15 last night has broken Studio. Studio window will open copying the focus window image but otherwise is blank. -- 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.

1 4

[Bug 58704] New: io_uring support for Wine
by WineHQ Bugzilla 16 Sep '25

16 Sep '25

http://bugs.winehq.org/show_bug.cgi?id=58704 Bug ID: 58704 Summary: io_uring support for Wine Product: Wine Version: unspecified Hardware: x86-64 OS: Linux Status: UNCONFIRMED Severity: normal Priority: P2 Component: -unknown Assignee: wine-bugs(a)winehq.org Reporter: k.kahurani(a)gmail.com Distribution: --- This issue mostly relates to the server(for filesystem operations), it seems like the networking implementation could be done outside the server. Just throwing this out there, it's highly unlikely I will work on it for various reasons. Wine still doesn't have io_uring support though, quite a few projects have already implemented io_uring support. Wine would also do with any performance benefits. io_uring is at least promoted as performance oriented, this makes it very interesting. io_uring offers performance benefits in multiple fronts. -> The first and probably the simplest is where operations on file might not have to make calls to 'fget'; typically when an operation is executed on files in Linux, it will involve some call to 'fget' one way or the other. With io_uring, it's possible to register files so that this 'fget' call is avoided. I am not sure how much performance benefit that could achieve. But, still an optimization nonetheless. Similarly, you could register buffers for opcodes(which translate to syscalls) so they're validated, mapped and so on so forth beforehand. When the actual operations/syscall are being executed, this boilerplate is not called. That is also an optimization. -> io_uring allows submitting a batch of syscalls(opcode operations) via one single syscall. This is an optimization, because, of course, without io_uring, you'd have to make multiple syscalls to achieve the same. However, it only seems like this optimization would only be applicable when making very many syscalls and making them very fast otherwise when making singular syscalls, they have to wait until the batch is full and hence would introduce some latency in low throughput situations. -> There might be other optimizations that I have not considered. What interests me most, though, is the syscall/request polling feature which allows applications to submit syscalls(opcode) via zero syscalls. io_uring sets up a kernel thread which polls the io ring and hence when submissions are made, the thread will discover them without any syscalls been made. This is very interesting and would be a straightforward mega-optimization were it not for that fact that the created kernel thread does pin a CPU. Would this work well with other work that's competing for CPU? It's consequently not very clear whether this would be an improvement to Wine, which makes syscalls alongside and in the midst of doing other heavy work. Any thoughts? -- 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.

1 2