Description: With version 26.2.0, the screen does not update correctly with Skia Vulkan. Steps to Reproduce: 1. Open with a clean profile 2. Verify that 'Force Skia software rendering' is disabled. 3. From the start screen open e.g. Calc Actual Results: It is very visible that the row numbers are superposed over the start screen. Attached screen. Expected Results: An updated screen. Reproducible: Always User Profile Reset: Yes Additional Info: With 'Force Skia software rendering' not looks like. But I think there is the issue, but very difficult to see it. I have seen it moving the sheet with long formulas using the horizontal scroll bar, but only once, and not able to repeat it. Version: 26.2.0.0.alpha0+ (X86_64) / LibreOffice Community Build ID: e9632c5d3ab90a75d3615147e6ecec682f7bc15c CPU threads: 16; OS: Windows 11 X86_64 (build 26100); UI render: Skia/Vulkan; VCL: win Locale: es-ES (es_ES); UI: es-ES Calc: CL threaded With Win in Dark mode.
Created attachment 201762 [details] Screenshot showing the issue.
It doesn't happen with: Version: 25.8.0.1.0+ (X86_64) / LibreOffice Community Build ID: fc3baba5ee80226c0f11232dbf07ce507d4f63d1 CPU threads: 16; OS: Windows 11 X86_64 (build 26100); UI render: Skia/Vulkan; VCL: win Locale: es-ES (es_ES); UI: es-ES Calc: CL threaded
IIANM skia libs through 25.8 are build m130, while for 26.2 it has been updated: to skia m136 -> m137 -> m138 -> and to latest m139 on 4 July. Very likely the issue is with hw/driver support for your Win11 build. New features in skia/Vulkan end up non-supported on hw/driver under Win11 WDDM 3.1 or WDDM 3.2 If skia software rendering is working, great! Use it. skia/Vulkan should probably not be active by default, but having it by default does expose weakness in os and hw/driver support of Vulkan. So some diagnostic value there. Exactly the same as with OpenGL hw/driver as it evolved.
Based on the date I am seeing the issue, I am not sure if it corresponds to Skia m139 on 4 July. Last working for me: Win-x86_64@tb77-TDF/2025-07-09_03.32.29 Version: 26.2.0.0.alpha0+ (X86_64) / LibreOffice Community Build ID: 12efeaf7b623e865e048fb4a8512a5f08f182760 CPU threads: 16; OS: Windows 11 X86_64 (build 26100); UI render: Skia/Vulkan; VCL: win Locale: es-ES (es_ES); UI: es-ES Calc: CL threaded First failing: Win-x86_64@tb77-TDF/2025-07-10_03.33.34 Version: 26.2.0.0.alpha0+ (X86_64) / LibreOffice Community Build ID: 7ef1c437f30b0869a5b9fa33809bac2c6665ace3 CPU threads: 16; OS: Windows 11 X86_64 (build 26100); UI render: Skia/Vulkan; VCL: win Locale: es-ES (es_ES); UI: es-ES Calc: CL threaded I couldn't find a release date for a new version of WDDM on Win, but it looks like it will be 25H2 at the earliest, although it seems to be every two years >2026. And if it's not with 25H2, we'll be in a situation where we can't use Skia/Vulkan with Win 11. At least until a Skia/Vulkan-compatible version of WDDM is available on Windows, I think “Force Skia software rendering” should be enabled by default. With clean install (with no profile) 'Force Skia software rendering' is disabled Skia log: RenderMethod: vulkan Vendor: 0x1002 Device: 0x1681 API: 1.4.308 Driver: 2.0.342 DeviceType: integrated DeviceName: AMD Radeon(TM) Graphics Denylisted: no This is part of the information generated with dxdiag: Driver Model: WDDM 3.2
(In reply to m_a_riosv from comment #4) OK, checked with a nightly past the 9 July build. Not affecting Vulkan rendering with a recent nVidia GPU and drivers. So not a general issue. RenderMethod: vulkan Vendor: 0x10de Device: 0x2803 API: 1.4.303 Driver: 576.160.0 //LO generates it wrong, should be 576.40.0.0 (bug 160783) DeviceType: discrete DeviceName: NVIDIA GeForce RTX 4060 Ti Denylisted: no You could try to disable the "Hardware Accelerated GPU Scheduling" (HAGS) that WDDM 3.2 enables by default. Widows registry: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\GraphicsDrivers DWORD (32 bit): 'HwSchMode' [hex 1 off, hex 2 on] But don't forget to *turn it back on* if it has no effect. ;-) =-testing-= TB78 WIX based nightly 2025-07-12 Version: 26.2.0.0.alpha0+ (X86_64) / LibreOffice Community Build ID: e38d4e8cf2b1a1b5c146acbe325d31f84da676b0 CPU threads: 28; OS: Windows 11 X86_64 (build 26100); UI render: Skia/Vulkan; VCL: win Locale: en-US (en_US); UI: en-US Calc: CL threaded Win11 WinVer: Verson 24H2 (OS Build 26100.4652) Display: Driver Version 32.0.15.7640
Created attachment 201775 [details] Screenshot Windows registry Thanks for the effort. But that Windows registry is not on my pc, I created it, but none of the values solves the issue. I'll search a bit more about the issue.
When asking Gemini AI about possible issues between WDDM and Skia/Vulkan, it looks that the matter is quite complex. It even seems that Google is considering a new Skia Graphite rendering architecture. In any case, I think the important thing is to anticipate how to act/avoid a widespread problem, with the negative impact on users' perception of LO.
Someone having issues with this, Please paste here the information on Menu/Help/About LibreOffice (There is an icon to copy). And the Skia log, Menu>Tools>Options>LibreOffice>View - Copy skia.log.