X-Spam-Check-By: sourceware.org Date: Tue, 28 Mar 2006 09:37:28 +0200 From: Corinna Vinschen To: cygwin AT cygwin DOT com Subject: Re: Sshd: problem with X11 passthru Message-ID: <20060328073728.GI20907@calimero.vinschen.de> Reply-To: cygwin AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com References: <2fc802c00603270955m5aab74d9s592c663ff905bae4 AT mail DOT gmail DOT com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <2fc802c00603270955m5aab74d9s592c663ff905bae4@mail.gmail.com> User-Agent: Mutt/1.4.2i Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm Precedence: bulk List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com On Mar 27 18:55, David Picton wrote: > I have encountered a problem with the sshd server when the client > specifies X11 passthru i.e. ssh -Y or ssh -X. > > The allocation of virtual displays doesn't work correctly if two or > more X11-enabled sessions run at the same time. > > As I understand it, the server should give each session a unique > display number under these circumstances: localhost:10.0, > localhost:11.0, localhost:12.0 etc. > > Instead, all the sessions have DISPLAY=localhost:10.0 at the same > time. This causes a variety of problems - loss of access to the X > server (due to changed Magic Cookie authorization on the server when a > new client connects), or the appearance of windows on the wrong server > (if two different clients connect). > > (Note that setting up Magic Cookie authorization on the client machine > makes no difference to this bug. It prevents the client-side warning > about 'fake authorization' but it doesn't cure any of the server-side > problems!) I don't see anything Cygwin specific here. You should ask your question on a mailing list or newsgroup dedicated to OpenSSH. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Project Co-Leader cygwin AT cygwin DOT com Red Hat -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/