SUMMARY Running Fedora Rawhide (40) and KDE Plasma 6 (git master, past beta 1) on Wayland, the content preview windows are empty. STEPS TO REPRODUCE 1. log into desktop 2. start some application (Firefox, konsole) 3. hover mouse cursor over task manager entry in bottom panel over running application OBSERVED RESULT Preview window comes up without content. EXPECTED RESULT Preview window comes up with content. Note that this is inside a guest on a VMware Workstation host, i.e. the rendering is going through the kernel's vmwgfx driver; everything on Fedora Rwahide is on the bleeding edge.
At the same time that "no content" pops up up, journalctl shows pipewire errors. I suspect that this unrelated, as pipewire is (largely) about audio, but I am pasting this still: ``` Dec 09 16:36:36 fedora pipewire[1654]: pw.context: params Spa:Enum:ParamId:EnumFormat: 0:0 Invalid argument (input format (no more input formats)) Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Object: size 160, type Spa:Pod:Object:Param:Format (262147), id Spa:Enum:ParamId:EnumFormat (3) Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Prop: key Spa:Pod:Object:Param:Format:mediaType (1), flags 00000000 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Id 2 (Spa:Enum:MediaType:video) Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Prop: key Spa:Pod:Object:Param:Format:mediaSubtype (2), flags 00000000 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Id 1 (Spa:Enum:MediaSubtype:raw) Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:format (131073), flags 00000000 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Id 7 (Spa:Enum:VideoFormat:RGBx) Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:size (131075), flags 00000000 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Choice: type Spa:Enum:Choice:Range, flags 00000000 40 8 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Rectangle 1x1 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Rectangle 1x1 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Rectangle -1x-1 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:modifier (131074), flags 00000008 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Long 72057594037927935 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Object: size 136, type Spa:Pod:Object:Param:Format (262147), id Spa:Enum:ParamId:EnumFormat (3) Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Prop: key Spa:Pod:Object:Param:Format:mediaType (1), flags 00000000 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Id 2 (Spa:Enum:MediaType:video) Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Prop: key Spa:Pod:Object:Param:Format:mediaSubtype (2), flags 00000000 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Id 1 (Spa:Enum:MediaSubtype:raw) Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:format (131073), flags 00000000 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Id 7 (Spa:Enum:VideoFormat:RGBx) Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:size (131075), flags 00000000 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Choice: type Spa:Enum:Choice:Range, flags 00000000 40 8 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Rectangle 1x1 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Rectangle 1x1 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Rectangle -1x-1 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: params Spa:Enum:ParamId:EnumFormat: 1:0 Invalid argument (output format (no more input formats)) Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Object: size 272, type Spa:Pod:Object:Param:Format (262147), id Spa:Enum:ParamId:EnumFormat (3) Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Prop: key Spa:Pod:Object:Param:Format:mediaType (1), flags 00000000 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Id 2 (Spa:Enum:MediaType:video) Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Prop: key Spa:Pod:Object:Param:Format:mediaSubtype (2), flags 00000000 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Id 1 (Spa:Enum:MediaSubtype:raw) Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:size (131075), flags 00000000 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Rectangle 1174x638 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:framerate (131076), flags 00000000 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Fraction 0/1 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:maxFramerate (131077), flags 00000000 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Choice: type Spa:Enum:Choice:Range, flags 00000000 40 8 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Fraction 60/1 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Fraction 1/1 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Fraction 60/1 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:format (131073), flags 00000000 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Choice: type Spa:Enum:Choice:Enum, flags 00000000 28 4 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Id 12 (Spa:Enum:VideoFormat:BGRA) Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Id 12 (Spa:Enum:VideoFormat:BGRA) Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Id 8 (Spa:Enum:VideoFormat:BGRx) Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:modifier (131074), flags 00000018 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Choice: type Spa:Enum:Choice:Enum, flags 00000000 48 8 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Long 72057594037927935 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Long 72057594037927935 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Long 0 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Long 72057594037927935 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Object: size 208, type Spa:Pod:Object:Param:Format (262147), id Spa:Enum:ParamId:EnumFormat (3) Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Prop: key Spa:Pod:Object:Param:Format:mediaType (1), flags 00000000 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Id 2 (Spa:Enum:MediaType:video) Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Prop: key Spa:Pod:Object:Param:Format:mediaSubtype (2), flags 00000000 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Id 1 (Spa:Enum:MediaSubtype:raw) Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:size (131075), flags 00000000 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Rectangle 1174x638 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:framerate (131076), flags 00000000 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Fraction 0/1 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:maxFramerate (131077), flags 00000000 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Choice: type Spa:Enum:Choice:Range, flags 00000000 40 8 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Fraction 60/1 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Fraction 1/1 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Fraction 60/1 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:format (131073), flags 00000000 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Choice: type Spa:Enum:Choice:Enum, flags 00000000 28 4 Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Id 12 (Spa:Enum:VideoFormat:BGRA) Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Id 12 (Spa:Enum:VideoFormat:BGRA) Dec 09 16:36:36 fedora pipewire[1654]: pw.context: Id 8 (Spa:Enum:VideoFormat:BGRx) Dec 09 16:36:36 fedora pipewire[1654]: pw.link: (57.0.0 -> 59.0.0) negotiating -> error (no more input formats) (configure-configure) Dec 09 16:36:36 fedora kwin_wayland[1656]: kwin_screencast: state changed paused -> error no more input formats Dec 09 16:36:36 fedora kwin_wayland[1656]: kwin_screencast: Stream error: no more input formats Dec 09 16:36:36 fedora kwin_wayland[1656]: kwin_screencast: PipeWire remote error: no more input formats Dec 09 16:36:36 fedora kwin_wayland[1656]: kwin_scene_opengl: 0x1: generating temporary index buffer for drawing MESA_PRIM_TRIANGLE_FAN Dec 09 16:36:36 fedora kwin_wayland[1656]: kwin_scene_opengl: 0x1: generating temporary index buffer for drawing MESA_PRIM_TRIANGLE_FAN Dec 09 16:36:36 fedora plasmashell[1769]: kpipewire_logging: Stream error: no more input formats Dec 09 16:36:36 fedora plasmashell[1769]: kpipewire_logging: PipeWire remote error: -32 no more input formats ```
Created attachment 164042 [details] Screenshot showing empty preview Attached screenshot showing the empty preview (and parts of the pipewire challenges in the background)
Note that Fedora Rawhide 40, as I am writing this, does not have the H.264 codec available (yet), so openh264 is not installed (in case that matters)
Does it happen on real hardware?
Am able to reproduce on real hardware with the proprietary Nvidia 545.29.06 driver. System info: Operating System: EndeavourOS KDE Plasma Version: 5.90.0 KDE Frameworks Version: 5.246.0 Qt Version: 6.6.1 Kernel Version: 6.6.6-zen1-1-zen (64-bit) Graphics Platform: Wayland Processors: 12 × AMD Ryzen 5 5600X 6-Core Processor Memory: 15.5 GiB of RAM Graphics Processor: NVIDIA GeForce GTX 1070/PCIe/SSE2
*** Bug 478286 has been marked as a duplicate of this bug. ***
*** Bug 475493 has been marked as a duplicate of this bug. ***
*** Bug 478587 has been marked as a duplicate of this bug. ***
There seems to be another bug after some plasma packages updated on 5.27.10 which do show proper previews, just when you select it it's either black screen with the cursor, or white screen with no cursor at all, the update came on arch repo a few days ago. Operating System: EndeavourOS KDE Plasma Version: 5.27.10 KDE Frameworks Version: 5.113.0 Qt Version: 5.15.11 Kernel Version: 6.6.8-x64v3-xanmod1 (64-bit) Graphics Platform: Wayland Processors: 16 × AMD Ryzen 7 5800X3D 8-Core Processor Memory: 31,3 GiB of RAM Graphics Processor: NVIDIA GeForce RTX 3090/PCIe/SSE2
Should be fixed by Ilya Bizyaev with https://invent.kde.org/plasma/kpipewire/-/commit/5fdfeb18c00ab619d234142d60e922a1f36ae588 in Plasma 6.0! Backporting is unlikely as there are no further Plasma 5 releases planned. But it's a small change, so any distros that are planning to stay with Plasma 5 for a while and want to backport it manually shouldn't have too hard of a time of it.
Alas, on my vmwgfx driver (see my initial report), the problem persists. I just ran a fresh kdesrc-build plasma-desktop, the linked commit 5fdfeb18c00ab619d234142d60e922a1f36ae588 is present locally, and I still get the same behaviour as before, where * the preview is empty * there is plenty of log output It might or might not be fixed for NVIDIA - I cannot tell right now. So, the recap, on the exact same (virtual) hardware, * this is faulty for me on Fedora Rawhide (40) with KDE Plasma git master * this works for me on Arch Linux with KDE Plasma 5.27.10
To reconfirm my challenge on vmwgfx, this is the log output with KDE Plasma 6 from git master (kdesrc-build plasma-desktop) with the commit included --- ``` Jan 05 08:59:58 fedora kwin_wayland[1829]: kwin_core: authorized "/home/stefan/kde/usr/bin/plasmashell" "zkde_screencast_unstable_v1" Jan 05 08:59:58 fedora pipewire[1826]: pw.context: params Spa:Enum:ParamId:EnumFormat: 0:0 Invalid argument (input format (no more input formats)) Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Object: size 160, type Spa:Pod:Object:Param:Format (262147), id Spa:Enum:ParamId:EnumFormat (3) Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Prop: key Spa:Pod:Object:Param:Format:mediaType (1), flags 00000000 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Id 2 (Spa:Enum:MediaType:video) Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Prop: key Spa:Pod:Object:Param:Format:mediaSubtype (2), flags 00000000 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Id 1 (Spa:Enum:MediaSubtype:raw) Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:format (131073), flags 00000000 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Id 7 (Spa:Enum:VideoFormat:RGBx) Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:size (131075), flags 00000000 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Choice: type Spa:Enum:Choice:Range, flags 00000000 40 8 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Rectangle 1x1 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Rectangle 1x1 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Rectangle -1x-1 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:modifier (131074), flags 00000008 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Long 72057594037927935 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Object: size 136, type Spa:Pod:Object:Param:Format (262147), id Spa:Enum:ParamId:EnumFormat (3) Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Prop: key Spa:Pod:Object:Param:Format:mediaType (1), flags 00000000 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Id 2 (Spa:Enum:MediaType:video) Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Prop: key Spa:Pod:Object:Param:Format:mediaSubtype (2), flags 00000000 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Id 1 (Spa:Enum:MediaSubtype:raw) Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:format (131073), flags 00000000 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Id 7 (Spa:Enum:VideoFormat:RGBx) Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:size (131075), flags 00000000 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Choice: type Spa:Enum:Choice:Range, flags 00000000 40 8 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Rectangle 1x1 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Rectangle 1x1 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Rectangle -1x-1 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: params Spa:Enum:ParamId:EnumFormat: 1:0 Invalid argument (output format (no more input formats)) Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Object: size 272, type Spa:Pod:Object:Param:Format (262147), id Spa:Enum:ParamId:EnumFormat (3) Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Prop: key Spa:Pod:Object:Param:Format:mediaType (1), flags 00000000 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Id 2 (Spa:Enum:MediaType:video) Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Prop: key Spa:Pod:Object:Param:Format:mediaSubtype (2), flags 00000000 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Id 1 (Spa:Enum:MediaSubtype:raw) Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:size (131075), flags 00000000 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Rectangle 1280x728 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:framerate (131076), flags 00000000 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Fraction 0/1 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:maxFramerate (131077), flags 00000000 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Choice: type Spa:Enum:Choice:Range, flags 00000000 40 8 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Fraction 60/1 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Fraction 1/1 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Fraction 60/1 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:format (131073), flags 00000000 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Choice: type Spa:Enum:Choice:Enum, flags 00000000 28 4 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Id 12 (Spa:Enum:VideoFormat:BGRA) Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Id 12 (Spa:Enum:VideoFormat:BGRA) Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Id 8 (Spa:Enum:VideoFormat:BGRx) Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:modifier (131074), flags 00000018 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Choice: type Spa:Enum:Choice:Enum, flags 00000000 48 8 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Long 72057594037927935 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Long 72057594037927935 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Long 0 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Long 72057594037927935 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Object: size 208, type Spa:Pod:Object:Param:Format (262147), id Spa:Enum:ParamId:EnumFormat (3) Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Prop: key Spa:Pod:Object:Param:Format:mediaType (1), flags 00000000 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Id 2 (Spa:Enum:MediaType:video) Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Prop: key Spa:Pod:Object:Param:Format:mediaSubtype (2), flags 00000000 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Id 1 (Spa:Enum:MediaSubtype:raw) Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:size (131075), flags 00000000 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Rectangle 1280x728 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:framerate (131076), flags 00000000 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Fraction 0/1 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:maxFramerate (131077), flags 00000000 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Choice: type Spa:Enum:Choice:Range, flags 00000000 40 8 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Fraction 60/1 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Fraction 1/1 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Fraction 60/1 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Prop: key Spa:Pod:Object:Param:Format:Video:format (131073), flags 00000000 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Choice: type Spa:Enum:Choice:Enum, flags 00000000 28 4 Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Id 12 (Spa:Enum:VideoFormat:BGRA) Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Id 12 (Spa:Enum:VideoFormat:BGRA) Jan 05 08:59:58 fedora pipewire[1826]: pw.context: Id 8 (Spa:Enum:VideoFormat:BGRx) Jan 05 08:59:58 fedora pipewire[1826]: pw.link: (43.0.0 -> 45.0.0) negotiating -> error (no more input formats) (configure-configure) Jan 05 08:59:58 fedora kwin_wayland[1829]: kwin_screencast: Stream error: no more input formats Jan 05 08:59:58 fedora kwin_wayland[1829]: kwin_screencast: PipeWire remote error: no more input formats Jan 05 08:59:58 fedora plasmashell[1957]: kpipewire_logging: Stream error: no more input formats Jan 05 08:59:58 fedora plasmashell[1957]: kpipewire_logging: PipeWire remote error: -32 no more input formats ```
The Pipewire output suggests the following: * the preview source data (i.e. "the window" == output) offers only format DRM_FORMAT_ARGB8888 (VideoFormat:BGRA, VideoFormat:BGRx) * the preview sink data (i.e. "the preview" == input) accepts only format VideoFormat:RGBx That is not compatible. That causes the failure with "Invalid argument (input format (no more input formats))". Now, the _output_ offers DRM_FORMAT_ARGB8888 because of special-case code. And on the input side (in KPipewire) the implementation of queryDmaBufModifiers may have a logic defect which incorrectly short-circuits processing of _all_ spa_video_formats ("break" vs "continue") With a bit of hackery in queryDmaBufModifiers, the input will now successfully accept DRM_FORMAT_ARGB8888, will use the "memfd" path ... ... and will silently _not work_, without any errors / diagnostics, and without a preview. TL;DR: whenever kwin forces DRM_FORMAT_ARGB8888 in the screencast plugin, kpipewire is not prepared to handle that.
*** Bug 479915 has been marked as a duplicate of this bug. ***