cygwin X fatals on -multiwindow option

Sat Mar 16 20:02:00 GMT 2013

Hi Jon, thanks for replying.
I have no ~/.startxwinrc file.

I installed xorg-server-debuginfo but still seem to have no symbols
showing up?  Here's what gdb gives me.  Anything else I can get for
you?  Thanks.

Initializing built-in extension X-Resource
Initializing built-in extension GLX
(II) xorg.conf is not supported
(II) See for more information
LoadPreferences: /home/aaronfi/.XWinrc not found
LoadPreferences: Loading /etc/X11/system.XWinrc
LoadPreferences: Done parsing the configuration file...
[New Thread 12576.0x3050]
[New Thread 12576.0x1d58]
[New Thread 12576.0x2004]
winDetectSupportedEngines - DirectDraw installed, allowing ShadowDD
winDetectSupportedEngines - Windows NT, allowing PrimaryDD
winDetectSupportedEngines - DirectDraw4 installed, allowing ShadowDDNL
winDetectSupportedEngines - Returning, supported engines 0000001f
[New Thread 12576.0x49c]
winSetEngine - Multi Window or Rootless => ShadowGDI
winScreenInit - Using Windows display depth of 32 bits per pixel
winAllocateFBShadowGDI - Creating DIB with width: 1440 height: 900 depth: 32
winFinishScreenInitFB - Masks: 00ff0000 0000ff00 000000ff
winInitVisualsShadowGDI - Masks 00ff0000 0000ff00 000000ff BPRGB 8 d 24 bpp 32
[New Thread 12576.0x1840]

winInitMultiWindowWM - Calling pthread_mutex_lock ()
[New Thread 12576.0x11c]

winMultiWindowXMsgProc - Calling pthread_mutex_lock ()
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

Program received signal SIGSEGV, Segmentation fault.
0x72c51c32 in aticfx32!GetKtProcAddress () from
(gdb) bt full
#0  0x72c51c32 in aticfx32!GetKtProcAddress () from

No symbol table info available.
#1  0x038807e0 in ?? ()

No symbol table info available.
#2  0x72f81d8b in atigktxx!GetD3DKMTProcAddress () from

No symbol table info available.
#3  0x032dd2e2 in ig4dev32!devProcessAttach () from

No symbol table info available.
#4  0x0028a5ec in ?? ()

No symbol table info available.
#5  0x009780c8 in ?? ()

No symbol table info available.
#6  0x032b7020 in ?? () from /cygdrive/c/Windows/SysWOW64/ig4dev32.dll

No symbol table info available.
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

On Sat, Mar 16, 2013 at 9:23 AM, Jon TURNEY <> wrote:
> On 15/03/2013 23:30, Aaron wrote:
> > My Cygwin/X server fatals on start up when running -multiwindow.
> > Loads just fine without it, or as -rootless.
> >
> > Any idea how I could fix this?  Log dump and stack trace below:
> >
> >
> Thanks for reporting this problem.
> Unfortunately, the automatically generated backtrace doesn't contain much
> useful information for debugging this problem.
> Please can you obtain a backtrace using the method under "Generating a
> backtrace when the X server is crashing at startup" in [1]?
> Do you have a ~/.startxwinrc, and if so, what are it's contents?
> [1]
> --
> Volunteer Cygwin/X X Server maintainer

Unsubscribe info:
Problem reports:

More information about the Cygwin-xfree mailing list