Mesa 26.2.1 Release Notes / 2026-08-20 — The Mesa 3D Graphics Library latest documentation

# Mesa 26.2.1 Release Notes / 2026-08-20

Mesa 26.2.1 is a bug fix release which fixes bugs found since the 26.2.0 release.

Mesa 26.2.1 implements the OpenGL 4.6 API, but the version reported by glGetString(GL_VERSION) or glGetIntegerv(GL_MAJOR_VERSION) / glGetIntegerv(GL_MINOR_VERSION) depends on the particular driver being used. Some drivers don’t support all the features required in OpenGL 4.6. OpenGL 4.6 is only available if requested at context creation. Compatibility contexts may report a lower version depending on each driver.

Mesa 26.2.1 implements the OpenCL 3.1 API, but the version reported by the CL_DEVICE_VERSION, CL_DEVICE_NUMERIC_VERSION and CL_DEVICE_OPENCL_C_ALL_VERSIONS clGetDeviceInfo queries depends on the particular driver being used.

Mesa 26.2.1 implements the Vulkan 1.4 API, but the version reported by the apiVersion property of the VkPhysicalDeviceProperties struct depends on the particular driver being used.

## SHA checksums

    SHA256: c47e81bddc4760360a41ac3c5acec38acb81f9d750ecef47e7f3adc7021a4442  mesa-26.2.1.tar.xz
    SHA512: d4bc755442c6573a1b75cafad50ec66594fa0ca7599c525f368bdecbd551a970e890ed6b044d9251f84278d27dcaa30649fbf4f4bf0adbaa76e1cc1ba6a1181f  mesa-26.2.1.tar.xz

## New features

- None

## Bug fixes

- RadeonSI VA-API: vertical color discontinuity / split on YouTube (AV1/VP9) with RX 7900 XTX

- Recording on AMD GPU using gpu-screen-recorder with VAAPI H.264 backend produces corrupted output since Mesa 26.0.0

- Regression: HEVC hardware decoding (VA-API) fails with “invalid UVD command 5!” on Stoney Ridge (amdgpu) in Mesa 26+

- V3D driver (Mesa) does not expose GL_EXT_shader_texture_lod, breaking raspberry Pi5 WebGL in Firefox (e.g. Google Maps with Street View)

- Witchfire - black artifacts

- [ANV][BMG] llama.cpp Flaky unit test results with latest Mesa﻿ on Arc B70 (Regression)

- [NVK/Kepler] NAK compiler panic in assign_regs.rs: “Failed to find free register” when launching wgpu application (Zed)

- [RADV] Insurgency Sandstorm - black Z-fighting geometry

- [meson] rust crate downloading for subbprojects blocked

- [radv] Anisotropic filtering glitch in Wolfenstein II: The New Colossus

- i915 GPU hang on Alder Lake-HX GT1 (8086:4688) with Mesa 26.2.0 OpenGL — works on 26.1.6

- radeonsi/VCN: HEVC VAAPI encode corrupts P-frames on Van Gogh (gfx1033) since Mesa 26.0 — I-frames and H.264 unaffected

- radeonsi: black screen in picom after ae36b9e3459766a953fe6318545463f9a773d119

- radeonsi: null-deref in validate_io() during glUseProgramStages on separable, SPIR-V-ingested program pipeline

- radv: vkCopyMemoryToImage segmentation fault with block-compressed formats when memoryRowLength is non-zero

- tu/anv: pDependencyInfos dereferenced as a single pointer instead of an array in CmdWaitEvents2

- tu: assertions in tu_formats.cc: Assertion `fmt.fmt != FMT6_NONE’ failed

## Changes

Aitor Camacho (1):

- kk: Fix host imported buffer offsets

Benjamin Cheng (7):

- radv/video: Fix interaction with KHR_extended_flags

- ac/video: Don’t take codec level from kernel

- ac: Fix guardband calculation for large viewports

- ac/uvd_dec: Only send SESSION_CONTEXT_BUFFER if needed

- vtn: Mark Location decorated variables with explicit_location

- glsl: Set location to -1 for SPIR-V built-ins

- mesa/shader_query: Handle SPIR-V built-ins in validate_io

Caio Oliveira (5):

- anv: Pass the correct RT shader key pointers

- brw: Respect execution mask when resetting GS control data

- intel: Preserve 64-bit hashes in shader dump filter

- anv: Close shader dump archive on device destruction

- brw: Fix scalar image coordinate payloads

Christian Gmeiner (4):

- etnaviv: Turn the sampler parameter loads into constants

- etnaviv: Derive the shadow compare shader key from current sampler state

- st/mesa: Only drop ARB_depth_buffer_float on desktop GL

- etnaviv: drm: Do not return a stale fence fd

Christoph Pillmayer (1):

- pan/bi: Fix vector phis from spilling

Connor Abbott (4):

- tu: Use correct pointer for vis stream patchpoint cs fence

- tu: Add missing WFI to tu6_clear_lrz()

- tu: Set MSM_SUBMIT_SYNCOBJ_* when there are only internal syncobjs

- nir: Don’t allow peephole_select on read_invocation

Danylo Piliaiev (5):

- tu: Fix vkResetQueryPool for pipeline statistics query

- tu: Fix condition for implicit dep of separate DS resolve

- tu: Fix CmdSetRenderingInputAttachmentIndices with custom resolve

- tu: Resuming dynamic rendering should re-emit attachments state

- tu: Fix gmem not being disabled for some non-fb-space stages with sync2

Dave Airlie (1):

- mesa/get: fix luid size and driver callback.

David Rosca (5):

- radeonsi/mm: Don’t use HEVC per slice loop filter across slices on old FW

- radv/video: Fix out of bounds reads of AV1 tile params

- radeonsi/mm: Use correct feedback size for VCE

- radv/video: Fix AV1 decode qmatrix params

- radeonsi/mm: Fix AV1 decode qmatrix params

Dmitry Baryshkov (2):

- panfrost/drm-shim: go through uintptr_t when casting a query pointer

- nouveau/drm-shim: use a 64 bit constant for the VRAM BAR size

Dominique Belhachemi (1):

- gallivm: orcjit: fix use-after-free in remove_jd() during exit

Dylan Baker (1):

- nir: Add an unreachable default to generated switch statement

Eric Engestrom (3):

- docs: add sha sum for 26.2.0

- [26.2 only] document a test as flaky

- .pick_status.json: Update to 6609a0e7a66288ee338e6ef0e5622d33923755e7

Felix DeGrood (1):

- util/u_debug: add unsigned_option

Georg Lehmann (1):

- radv: disable nir_opt_reassociate_for_fma for VS if it’s not the last pre FS shader

Gyeyoung Baek (9):

- drm-shim: remove the BO’s `offset_map` entry on free

- pvr/drm-shim: fix BO refcount leak

- panfrost/drm-shim: fix BO refcount leak

- lima/drm-shim: fix BO refcount leak

- radeon/drm-shim: fix BO refcount leak

- amdgpu/drm-shim: fix BO refcount leak

- intel/drm-shim: fix BO refcount leak

- drm-shim: fix inverted BO refcounting

- pvr: fix sampler handle dereference with immutable samplers

Hans-Kristian Arntzen (1):

- radv: Prefer STRUCTURED OOB over STRUCTURED_OFFSET for texel buffers.

JaeHoon Lee (2):

- v3dv: check for a failed default attribute values allocation

- v3dv: report correct TMU spill and fill counts

Jan Meisel (1):

- nir/search: reset FP state for commutative match attempts

Jianxun Zhang (3):

- iris: Fix an assertion when importing dmabuf

- anv: Refactor check on CCS modifiers

- anv: Set dedicated_only feature bit for CCS modifiers

Jose Maria Casanova Crespo (4):

- v3d: cap CL BO growth when doubling

- v3dv: cap CL BO growth when doubling

- broadcom/compiler: restrict fsat_signed/fclamp_pos to 32-bit

- broadcom/compiler: handle 16-bit fsat

Juan A. Suarez Romero (3):

- v3d: fix data in get UBO size

- broadcom/compiler: flip varyings replaced through COORD_REPLACE

- broadcom/compiler: set full texture coordinates for sprite points

Kajal Kajal (1):

- rusticl: fix wrong destination offset in Image::copy_to_buffer

Karol Herbst (4):

- clc: move open_clc_data below map_clc_data and close_clc_data

- clc: use the libclc file size from stat instead of seeking

- clc: map the libclc early

- clc: stop using the mtime as it is not reliable

Kenneth Graunke (1):

- nir: Set info->fs.color_is_dual_source for DUAL_SRC_BLEND var locations

Lars-Ivar Hesselberg Simonsen (1):

- panvk/v10+: Fix unbound LD_ATTR.auto32

Linermao (1):

- virgl: Close winsys fd after destroying screen

Lionel Landwerlin (5):

- anv: fix descriptor heap with non buffer aligned addresses pre Gfx12.5

- vulkan/runtime: reindex internal bits

- brw: fix non register aligned MOV_INDIRECT source

- anv: fix CmdWaitEvents2 dependencyFlags usage

- anv: flush L1/L2 caches on end of command buffer

Lucas Stach (3):

- etnaviv: drm: don’t skip submit if there is a in_fence

- etnaviv: discard in_fence fd after flush

- etnaviv: resume active queries after pending resources has been reset

Maaz Mombasawala (2):

- svga: Pass buffer handle for fd handles for resource_from_handle()

- svga: Remove erroneous else-if in surface_get_handle()

Mary Guillemard (1):

- nak: Do not encode a RZ for src2 on FMNMX

Mel Henning (2):

- nak: Serialize carry access in instr_sched_prepass

- subprojects: Use CDN URLs for crates.io

Paul Grandperrin (2):

- wsi/wayland: move wsi_wl_surface_get_present_modes() higher in file

- wsi/wayland: send tearing hints when present mode changes to IMMEDIATE

Pierre-Eric Pelloux-Prayer (5):

- radeonsi: fix typo in barrier flag check

- radeonsi/sqtt: fix barrier flags for <= gfx8

- radeonsi: fix typo in descriptors bitmask

- radeonsi: fix off-by-one cs shader indexing

- radeonsi: fix AMD_DEBUG=usellvm usage

Rhys Perry (4):

- ac/nir/lower_tex_coords: fix moving vector FS inputs loads

- nir/cf: add nir_cf_list_detach_ssa

- nir/simplify_loops: lower ssa to registers if it might be necessary

- nir/simplify_loops: fix predication of an empty cf list

Rob Clark (2):

- nir: Add missing lower_io case

- Revert “freedreno: Don’t re-bind global buffers”

Robert Mader (3):

- llvmpipe: Pass size to displaytarget_create_mapped()

- kms-dri-sw: Use size and offset from whandle in create_mapped()

- dri-sw: Use size and offset from whandle in create_mapped()

Ryan Zhang (4):

- panvk/utrace: add dynamic alloc for utrace clone buffer

- panvk/utrace: skip clone copy when timestamp buffer allocation fails

- panvk/utrace: guard delete_buffer against NULL on clone alloc failure

- panvk/utrace: handle clone CS heap exhaustion gracefully

Samuel Pitoiset (10):

- ac/gpu_info: fix detecting AMD BC250 as RDNA1

- wsi/display: fix a memleak when swapchain creation failed

- wsi/display: free the previous display name when EDID is parsed

- radv: fix computing BC formats in texels for HIC

- radv: add a workaround for broken multi viewport with UE5

- radv: fix blitting for 2D array to 3D with a Z flip

- radv: fix cmdbuf alignment with DGC when queues aren’t enabled

- radv: reset color remapping states when CmdBeginRendering() is called

- radv: set radv_disable_aniso_single_level=true for Wolfenstein II: The New Colossus

- radv/meta: fix using aspects for blits

Sebastian Wick (4):

- kms-dri-sw: Remove always-true whandle check and simplify control flow

- kms-dri-sw: Handle drmPrimeFDToHandle errors in create_mapped()

- kms-dri-sw: Move find_and_ref() to make it available to create_mapped()

- kms-dri-sw: Deduplicate displaytargets by handle in create_mapped()

Timur Kristóf (6):

- ac/nir/clear_copy_buffer: Fix last thread byte count

- aco/isel: Only allow first load to write the dst

- radv: Use GL2_BYPASS flag for GFX preamble

- radv: Use preemptable wait in gang preamble

- radv: Use PFP for gang postamble wait and write

- radv: Wait for L2 cache writeback on ACE for SDMA+ACE gangs

Tupili Krishna Gowtham Reddy (1):

- tu: Don’t force R32_UINT when clearing MSAA E5B9G9R9 images

Utku Iseri (1):

- pan: allow CRC with AFBC

Valentine Burley (1):

- tu: Fix pDependencyInfos indexing and barrier emission in CmdWaitEvents2

Vandomas (1):

- wsi/metal: fix memoryTypeIndex in image memory allocation

Yi Ding (1):

- panfrost: clear shader image mask on trailing unbinds

Yiwei Zhang (2):

- venus: amend VK_EXT_ycbcr_image_array advertisement

- vulkan/android: undo forcing linear for mutable format

Zan Dobersek (1):

- tu: fix R64 image clears via non-generic clear code path

Zhang, Jianxun (1):

- anv: Require dedicated allocation query on scanout images from WSI

mmes (1):

- anv: fix upload of shader kernels spanning more than one heap BO