Randy Galbraith – MCPS AppDev – Scottsdale 480-445-2685 – cell: 602-531-0957 – wendy: 602-909-9901 – home: 602-539-1817 Absolutely critical: “Universal wearing of masks. Stay away from crowds. Close the bars." - Dr. Anthony Fauci, PBS NewsHour, 7/17/20. Data classification: PROPRIETARY
-----Original Message----- From: Galbraith, Randy Sent: Thursday, May 20, 2021 9:56 AM To: cygwin@cygwin.com Subject: Re: Cygwin/X fails post Windows 10 version 1909 On 19/05/2021 19:03, Galbraith, Randy via Cygwin wrote: >>> Hi Everyone. >>> >>> Following a Windows 10 version 1909 update Cygwin/X fails to start. It ends >>> with: >>> >>> (--) 16 mouse buttons found >>> (--) Setting autorepeat to delay=500, rate=31 >>> xinit: giving up >>> xinit: unable to connect to X server: Connection refused >>> xinit: server error >>> >>> [1]+ Exit 1 startx -- :1 -multiwindow -clipboard >>> >>> If I run XWin under gdb with xorg-server-debuginfo package installed I can >>> see this stack trace: >>> >>> Thread 1 "XWin" received signal ?, Unknown signal. >>> 0x00007ffa99383b19 in RaiseException () from >>> /cygdrive/c/WINDOWS/System32/KERNELBASE.dll >>> (gdb) bt >>> #0 0x00007ffa99383b19 in RaiseException () from >>> /cygdrive/c/WINDOWS/System32/KERNELBASE.dll >>> #1 0x00007ffa97662086 in ?? () >>> from /cygdrive/c/Program Files/Citrix/ICAService/cxinjime64.dll >>> #2 0x00007ffa97661afd in ?? () >>> from /cygdrive/c/Program Files/Citrix/ICAService/cxinjime64.dll >>> #3 0x00007ffa97661695 in ?? () >>> from /cygdrive/c/Program Files/Citrix/ICAService/cxinjime64.dll >>> #4 0x000000010040df3e in winConfigKeyboard >>> (pDevice=pDevice@entry=0x80027d720) >>> at ../hw/xwin/winconfig.c:274 >>XWin is just calling GetKeyboardLayoutName() here, which Citrix appears to be >>hooking. >> https://gitlab.freedesktop.org/xorg/xserver/-/blob/master/hw/xwin/winc >> onfig.c#L274 >>> #5 0x0000000100410f36 in winKeybdProc (pDeviceInt=0x80027d720, >>> iState=<optimized out>>>) at ../hw/xwin/winkeybd.c:99 >>> #6 0x0000000100469bc7 in ActivateDevice (dev=dev@entry=0x80027d720, >>> sendevent=sendevent@entry=1 '\001') at ../dix/devices.c:576 >>> #7 0x000000010046d8bd in InitAndStartDevices () at >>> ../dix/devices.c:762 >>> #8 0x0000000100479f8f in dix_main (argc=2, argv=0xffffcc50, >>> envp=<optimized out>>>) at ../dix/main.c:251 >>> #9 0x0000000180049efd in dll_crt0_1 () at >>> /usr/src/debug/cygwin-3.2.0-1/winsup/cygwin/dcrt0.cc:1028 >>> #10 0x0000000180047856 in _cygtls::call2 (this=0xffffce00, >>> func=0x180048d30 <dll_crt0_1(void*)>>>, arg=0x0, >>> buf=buf@entry=0xffffcdf0) at >>> /usr/src/debug/cygwin-3.2.0-1/winsup/cygwin/cygtls.cc:40 >>> #11 0x0000000180047904 in _cygtls::call (func=<optimized out>>>, >>> --Type <RET>>> for more, q to quit, c to continue without paging-- >>> arg=<optimized out>>>) at >>> /usr/x86_64-pc-cygwin/sys-root/usr/include/w32api/psdk_inc/intrin-imp >>> l.h:790 >>> #12 0x0000000000000000 in ?? () >>> Backtrace stopped: previous frame inner to this frame (corrupt >>> stack?) >>> (gdb) >>> >>> The ICA reference reflects my Citrix connection to a virtual Windows 10 >>> desktop. I am working in a corporate setting however I do have admin rights >>> to this virtual machine. Based on "connection refused" my hypothesis was >>> our Windows 1909 push may have blocked ports Xwin is using. If there are >>> specific Windows Defender Firewall rules that are required I would be happy >>> to put them in. The bit of firewall setup I've tried thus far has not >>> helped. This backtrace though makes me think this may be a keyboard >>> configuration issue. >>> >>> Any advice and guidance on how to debug this problem will be greatly >>> appreciated. Several on our development team rely on Cygwin/X and are >>> rather unhappy to now be restricted to command line tools until we can get >>> this resolved. >>This is a crash in Citrix, so I'm afraid the best (and possibly only) people >>who can debug this are Citrix... >> Just Googling the faulting DLL name did I find [1], which seems to indicate >> you can turn off this hooking with a registry key. >>[1] >>https://helgeklein.com/blog/2015/10/citrix-xenappxendesktop-api-hooking-explained >Jon, thank you so much for your response! For a brief moment yesterday >X-Windows >started. This occurred after I set: >Flag = 0 under: >HKLM\SOFTWARE\Citrix\CtxHook\AppInit_Dlls\Multiple Monitor Hook >I then removed: >xorg-server-cygwin-crashreporter >xorg-server-debuginfo >Rebooted and tried again. Alas, back to "Connection refused." I reinstalled >those >packages but the problem continues. I ran gdb to get a backtrace this >morning and >we're still seeing the same stack: >#0 0x00007ffa0af83b19 in RaiseException () > from /cygdrive/c/WINDOWS/System32/KERNELBASE.dll >#1 0x00007ffa0a032086 in ?? () > from /cygdrive/c/Program Files/Citrix/ICAService/cxinjime64.dll >#2 0x00007ffa0a031afd in ?? () > from /cygdrive/c/Program Files/Citrix/ICAService/cxinjime64.dll >#3 0x00007ffa0a031695 in ?? () > from /cygdrive/c/Program Files/Citrix/ICAService/cxinjime64.dll >#4 0x000000010040df3e in winConfigKeyboard (pDevice=pDevice@entry=0x80027d720) > at ../hw/xwin/winconfig.c:274 >I asked one of our developers who has a company laptop (i.e. VPN access, not >Citrix) to test his setup. It works. Thus the problem does seem to be Citrix >related. I've now reached out to another developer who is running Cygwin >2.11.1. I believe his copy is running while he does use Citrix and Windows 10 >1909. >That's all I have for now. The chase continues. >Kind regards, >-Randy Galbraith One of my colleagues discovered the act of change HKLM\SOFTWARE\Citrix\CtxHook\AppInit_Dlls\Multiple Monitor Hook\Flag from 0 to 1 and back again can be a work-around. Immediately after this key is changed X-Windows will start. If one does a reboot X-Windows will fail again. Change Flag and X-Windows works. Not ideal and we would still like to figure out what is going on, this does get us back in business with X-Windows. Kind regards, -Randy -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
