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Date: Mon, 18 May 2026 18:01:56 +0900
To: cygwin AT cygwin DOT com
Subject: Re: X server doesn't start
Message-Id: <20260518180156.03c126b7c4d55a929cb6e4c4@nifty.ne.jp>
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From: Takashi Yano via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>
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On Mon, 18 May 2026 10:41:10 +0200 (CEST)
Fabio Rossi wrote:
> I had installed Cygwin with X server on a Windows 10 machine without problems. Now I have converted the same machine to Windows 11 but not I am not able to run X server anymore. I get no meaningful errors. I have tried also reinstalling Cygwin with the same result. Here is the output when running the simplest case:
> 
> $ XWin
> Welcome to the XWin X Server
> Vendor: The Cygwin/X Project
> Release: 1.21.1.21
> OS: CYGWIN_NT-10.0-26200 XXXXXX 3.6.9-1.x86_64 2026-04-21 15:46 UTC x86_64
> OS: Windows 10  [Windows NT 10.0 build 26200] x64
> Package: version 21.1.21-1 built 2026-01-16
> 
> winInitializeScreenDefaults - primary monitor w 1024 h 768
> (--) Windows reports only 2 mouse buttons, defaulting to -emulate3buttons
> XWin was started with the following command line:
> 
> XWin
> 
> (II) xorg.conf is not supported
> (II) See http://x.cygwin.com/docs/faq/cygwin-x-faq.html for more information
> winUpdateDpi - primary monitor native DPI x 96 y 96
> LoadPreferences: /home/pcad/.XWinrc not found
> LoadPreferences: Loading /etc/X11/system.XWinrc
> LoadPreferences: Done parsing the configuration file...
> winDetectSupportedEngines - RemoteSession: yes
> winDetectSupportedEngines - DirectDraw4 installed, allowing ShadowDDNL
> winDetectSupportedEngines - Returning, supported engines 00000005

Are these lines the entire message? Usually, they are followed
by the messages such as:

winSetEngine - Using Shadow DirectDraw NonLocking
winScreenInit - Using Windows display depth of 32 bits per pixel
winWindowProc - WM_SIZE - new client area w: 3824 h: 2073
winFinishScreenInitFB - Masks: 00ff0000 0000ff00 000000ff
MIT-SHM extension disabled due to lack of kernel support
XFree86-Bigfont extension local-client optimization disabled due to lack of shared memory support in the kernel
(EE) AIGLX: No native OpenGL in modes with a root window
(II) IGLX: Loaded and initialized swrast
(II) GLX: Initialized DRISWRAST GL provider for screen 0
winPointerWarpCursor - Discarding first warp: 1912 1036
(--) 16 mouse buttons found
(--) Setting autorepeat to delay=500, rate=31
(--) Windows keyboard layout: "00000409" (00000409) "US", type 4
(--) Found matching XKB configuration "English (USA)"
(--) Model = "pc105" Layout = "us" Variant = "none" Options = "none"
Rules = "base" Model = "pc105" Layout = "us" Variant = "none" Options = "none"

-- 
Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>

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