📢 Announcement: xorg-server 26.0.99.901

From: Alan Coopersmith (alan.coopersmith at oracle.com)
Date: Thursday, August 20, 2026, 02:01:40 UTC

Following the established roadmap, I am happy to introduce xorg-server 26.0.99.901. This release serves as the initial release candidate for the upcoming version 26.1.0 (commonly referred to as xorg-server 26.1.0 rc1).

🛠️ Scope of the Release

This package encompasses all server implementations excluding Xwayland. The included servers are visualized below:

🚀 Significant Updates since v21.1

Several major changes have been integrated since the xorg-server 21.1 era:

• Build System: autoconf/automake $\rightarrow$ meson (now the sole build system).
• DPMS: Implementation of the DPMSInfoNotify event (per DPMS 1.2).
• XFixes: Added support for version 6.1, including the AllowForceTerminate configuration option in xorg.conf.
• Security & Defaults:
  • Byte-swapped clients are now disallowed by default.
  • Connections to the font server are disabled by default.
• Platform Specifics:
  • Xorg: Introduced a DRM platform specifically for BSD.
  • Xorg: For users not running as root, log files have been relocated to $XDG_STATE_HOME/xorg.
• Xvfb Enhancements:
  • Now supports multiple CRTCs.
  • Expanded mouse support to include up to 13 buttons.
• Quality Assurance: An expanded suite of tests has been included.

🧪 Testing & Bug Reporting

Community feedback and testing for this RC are highly encouraged.

[!IMPORTANT] Recommendation for Xorg Testers: It is strongly advised to build and execute this version against libpciaccess 0.19 (released March 2026). Certain bug fixes rely on a new API from that release; Meson will only trigger these fixes if the API is detected during the build process.

Reporting Pipeline:

• Identify bug
• Verify against libpciaccess 0.19
• Submit issue at: https://gitlab.freedesktop.org/xorg/xserver/-/issues

📦 Download and Verification

The current version can be represented mathematically as: $V_{release} = 26.0.99.901$

📝 Detailed Change Logs

The following logs detail all modifications since the inception of the xorg-server-21.1 branch. Note: Some entries may apply to Xwayland or were previously backported (e.g., CVE patches).

Aaron Dill (1 commit)

• logind: Implemented SetType call for sessions.

Aaron Plattner (4 commits)

• modesetting: Restricted GAMMA_LUT usage to cases where size is exactly 1024.
• xfree86: Ensured strings in hwEnableIO are NUL-terminated.
• os: Added signal handler printouts when unw_is_signal_frame() is true.
• os: Integrated register printing into the xorg_backtrace() libunwind implementation.

Adam Jackson (17 commits)

• selinux: Removed dependency on security_context_t.
• xinput/xkb/dmx: Resolved various GCC 11 warnings (silencing and redeclarations).
• ephyr/glamor: Migrated to EGL.
• glamor:
  • Avoided open-coding epoxy_glsl_version().
  • Required EGL_KHR_no_config_context.
  • Assumed EGL within glamor_context.
• ephyr: Avoided open-coding glamor_compile_glsl_prog and reduced synchronization in hostx_paint_rect and ephyrInternalDamageRedisplay.
• wayland/streams: Avoided open-coding glamor_compile_glsl_prog.
• xwayland/glx: Enabled sRGB fbconfigs.
• glx/dri: Filtered fbconfigs lacking supported pixmap formats.
• present: Added PresentConfigureNotify events for windows that are destroyed.
• glamor: Extracted the GLX EGL backend from Xwayland.
• glamor/glxprov: Stopped exposing configs that aren't db-capable.

Aki Sakurai (2 commits)

• xquartz: Fixed build errors and corrected the inverted Y tilt for tablet pens on macOS.

Alan Coopersmith (216 commits)

• Documentation: Fixed a double "the" typo.
• XFree86: Completed the removal of numTimings in xf86ValidateModes().
• CI/CD:
  • Enabled GitLab's static analysis and merge request checks.
  • Added workflow rules and a .mailmap for author canonicalization.
  • Updated xcb utility libraries and cloned libdecor.
• Optimization: Replaced memmove() with memcpy() in os, dix, and mi where buffers don't overlap.
• Compatibility:
  • Attempted modesetting on all build platforms.
  • Removed "All rights reserved" from Oracle copyrights.
  • Fixed FreeBSD builds (bsd_init.c) and ensured lnx_platform.c compiles on FreeBSD.
  • Removed legacy support for SysV (pre-SVR4) and non-Solaris SVR4 systems.
• OS/Kernel:
  • Assumed seteuid saved IDs for all non-WIN32 platforms.
  • Removed apollo and SUNSYSV unifdefs.
  • Converted Solaris APM interfaces to official SRN interfaces.
• X Extensions & Manuals:
  • Xext: Fixed SProcSyncCreateFence to swap drawable IDs.
  • Xserver.man: Documented that -byteswappedclients is now the default.
  • xorg.conf.man: Fixed formatting for AllowByteSwappedClients.
  • Xi: Fixed ProcXIGetSelectedEvents and ProcXIPassiveGrabDevice to use unswapped lengths.
  • Xquartz: Fixed ProcAppleDRICreatePixmap to use unswapped lengths.
• Miscellaneous:
  • Removed Solaris keyboard headers from xf86_OSlib.h.
  • Updated calloc calls to move sizeof to the second argument.
  • meson: Fixed AF_INET6 checks for strict compilers.
  • compiler.h: Dropped Sun compiler platform define translations.
• DIX Fixes:
  • Added calloc() failure checks in Xi event conversion.
  • PolyText: Fully initialized local_closure.
  • SetFontPath: Fixed errorValue on success.
  • enterleave.c: Fixed implicit fallthrough warnings.
  • CreateScratchGC: Fixed a NULL pointer dereference.
  • InitPredictableAccelerationScheme: Fixed a memory leak on failure.
  • dixChangeWindowProperty: Added check for malloc failure before memcpy.
  • ProcListProperties: Optimized for numProps == 0.
  • HashResourceID: Switched to unsigned integers for bit shifting.
  • GetPairedDevice: Added NULL check for GetMaster.
  • FindBestPixel: Fixed implicit fallthrough warnings.

# Example: Checking the git tag
git tag -l "xorg-server-26.0.99.901"