X-Recipient:	archive-cygwin AT delorie DOT com
DomainKey-Signature:	a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:from:to:subject:date:message-id:mime-version
	:content-type:content-transfer-encoding; q=dns; s=default; b=Ztk
	KdUKG1uNNxbL2hwljC3vhtd31jij/BeF8befD8YU5giCE/0+qi86xSF0PS71qQ01
	aXUp3UDTnJr4nMPmiaGZrMN2lFV4o6hoVAVW+LnTX4r0P8k0iZSfP6apUq6vOneB
	yB+TrR55xedbwMRID0FOnxBNuhhonxZdhwNESBSc=
DKIM-Signature:	v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:from:to:subject:date:message-id:mime-version
	:content-type:content-transfer-encoding; s=default; bh=BdOmmhk5g
	CychjDA1CVYGneGOCM=; b=wMuHDofayv7oBEL3J+2fyI/0ZeLVGj0TKm9B1mRQf
	UOGBrlLpKiS8LRRemktGmNZp36BC8vxNieQNHuyp5nWL9C8Mgwd1tAdp38vFRRML
	PNyHFuLka2lpFjkva0bWvz2Ib5e6x5jczHNfgsqR/UvGA4LIWQLpIvDBwDa33+GM
	dI=
Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id:	<cygwin.cygwin.com>
List-Subscribe:	<mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive:	<http://sourceware.org/ml/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender:	cygwin-owner AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
Delivered-To:	mailing list cygwin AT cygwin DOT com
Authentication-Results:	sourceware.org; auth=none
X-Spam-SWARE-Status:	No, score=-1.9 required=5.0 tests=BAYES_00,HTML_MESSAGE,RCVD_IN_DNSWL_NONE,SPF_HELO_PASS,SPF_PASS autolearn=ham version=3.3.1 spammy=rolling, picture, March, launch
X-HELO:	NAM12-BN8-obe.outbound.protection.outlook.com
ARC-Seal:	i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=FTJlm5/U3bqgaiynj9+KiEBpja+DzWQOq6kVZ4fDjExxOsmWCqkTts+4NGkO8foV2iPO3ERcq29AatFqEBH4/Bal/ponMzSJQJ2gBsvaYFVMe3jbu1i9WUqOto2/IeffO2Jaoc7jTdf+cpZ4F2VBzSrH5W4xzxaM6+NZGjVAHpc/2eNrnFfUSdHdBZsqrNhTgYbyCxoaACTaG0/16JmrehiQzSdZb6PdasdBq/3Vmll+WSIn8nIRDJanWv39BqxoUF8wdKz3xhEOKyOOKGFCBAItOIr51n78mWtN/1jK97k4GyXYDakpM86O2wiptkMb5tnfZIQTFnN+89ZFH0yBFg==
ARC-Message-Signature:	i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=/PvfqAFLHrpvmzCjDhFmhj+M7TQ34dojTkRtHWPJdQ8=; b=QMv+Slqgrz+g1aAiRD4u9YL7wlgUeeL81MmwNa1WPFKDktPeU4MGgsiwU7TgBUllMnRuBpY/Aq9E0/EUsAfyqQFpTn+k1qp6kiuMaOpHhPZUPCtt65nBajJCfSHQW2/Y8N/jWsHIaD7qLup4yf50btg01AnBhgJWujiSfz06gXIJiJoMqN/9q3589fWWqtwOe9KniU1VSMICH5hraMS/k9I6IW4774oBTWC/p3uHcSP1k5esqaip1yt1yYeDZSvfMRlz4TokyaRBsqcibttwJAxPrilYSPVMun9i6cCZGIAgCUPFHdayRnk9ljQwdRhp//7eS6EL0vAKrwtdBIX0QA==
ARC-Authentication-Results:	i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=sonicwall.com; dmarc=pass action=none header.from=sonicwall.com; dkim=pass header.d=sonicwall.com; arc=none
DKIM-Signature:	v=1; a=rsa-sha256; c=relaxed/relaxed; d=msazuresonicwall.onmicrosoft.com; s=selector2-msazuresonicwall-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=/PvfqAFLHrpvmzCjDhFmhj+M7TQ34dojTkRtHWPJdQ8=; b=Yhh3Ap3VO644ZoX7xW9EBqaN0ww7PUU1VZW2gsjCfWEw7uYhZn7I5vD1e1RcbEnKIMVt3Jv/ZaQVAN84BJJrkdUXAM0w7Jtj/n9p5MSgW+LL/xfVX8+rESdMsbLMrmUaNIcXSYgFDCFgYNVPfV7xIq6B6VhGciY0VFgeyoRV0rc=
From:	Ian Puleston <ipuleston AT SonicWall DOT com>
To:	"cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Subject:	X11 forwarding extremely slow (unusable) after Cygwin upgrade on Dec 23rd
Date:	Sat, 28 Dec 2019 00:39:01 +0000
Message-ID:	<BY5PR18MB33611C2867F9EAD91EB51A8EB8250@BY5PR18MB3361.namprd18.prod.outlook.com>
authentication-results:	spf=none (sender IP is ) smtp.mailfrom=ipuleston AT SonicWall DOT com;
x-ms-oob-tlc-oobclassifiers:	OLM:9508;
received-spf:	None (protection.outlook.com: SonicWall.com does not designate permitted sender hosts)
x-ms-exchange-senderadcheck:	1
x-ms-exchange-transport-forked:	True
MIME-Version:	1.0
X-MS-Exchange-CrossTenant-mailboxtype:	HOSTED
X-MS-Exchange-CrossTenant-userprincipalname:	P36I27SyoTg+usCjEwCYDycqwvqM7qXsaCLAWtQOfD9p593YG9bNtmcYU/xs/7OjYGk4AJkkK4KXGCttjqOKaA==
X-MIME-Autoconverted:	from quoted-printable to 8bit by delorie.com id xBS0djYR013175

Hi,

I have a Cygwin installation on a Windows 10 PC, on which I use X-Windows to access a Linux development/build server. All has been working great for a long time, until I rand a Cygwin upgrade on December 23rd, and after that X11 has become pretty much unusable. I normally launch the terminator terminal emulator locally under X, in that I "ssh -Y" to the Linux machine, and then on there I use a number of GUI apps, mainly SlickEdit and BeyondCompare, which run remotely via X11 forwarding to display in windows on my local Windows PC. But since this Cygwin upgrade all of those remote X11 apps are now extremely slow to respond to anything - about 10 to 20 seconds to action any key press or mouse click.

The two machines are on the same Gig-Ethernet LAN segment so there are no latency issues there (ping response time <1mS).

To take any possible problems with those components out of the picture, I tried instead launching xterm under X11 locally, and from it launching Firefox after ssh to the Linux machine, and again I see the same symptoms with that - trying to type into Firefox's address bar takes about 10 seconds per letter.

I had previously updated my Cygwin installation on March 3rd 2019, so this problem has come in sometime between then and now. I've just spent a very long day and a half rolling back the changes as much as I could (by hacking the setup.ini and re-installing previous versions from the local download cache) and eventually managed to get a working hybrid with enough packages rolled back to make the difference, and now X11 is working fine again.

I also tried a new clean install of the latest Cygwin, after deleting my .XWinrc and removing all but the bare minimum from .startxwinrc, and do see the problem with that too.

Is this any known problem? I couldn't find anything obvious in the email archives.

Ian

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple

- Raw text -