From mboxrd@z Thu Jan 1 00:00:00 1970 From: Antoine Martin Subject: Re: Mouse motion lags Date: Tue, 06 Jan 2009 13:26:01 +0700 Message-ID: <4962F979.7040702@nagafix.co.uk> References: <7bed83ad0901010905x23d0e745rf74be537cfcfc6d7@mail.gmail.com> <4960B941.8000700@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: Avi Kivity , Volodymyr Buell , "kvm@vger.kernel.org" To: nuitari@melchior.nuitari.net Return-path: Received: from mamba.nagafix.co.uk ([194.145.196.68]:54488 "EHLO mail.nagafix.co.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751020AbZAFGhU (ORCPT ); Tue, 6 Jan 2009 01:37:20 -0500 In-Reply-To: Sender: kvm-owner@vger.kernel.org List-ID: -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 nuitari@melchior.nuitari.net wrote: >>> Hi everybody, >>> >>> I switched to KVM some time ago from vmware and VB. Everything works >>> great but there are noticeable lags in mouse motion in comparison with >>> other VMs. >>> Is this a known issue? Are there any optimizations for that? >>> >>> KVM: 79 >>> Distr: Ubuntu Intrepid & Jaunty >>> Command line: QEMU_AUDIO_DRV=sdl; kvm -net nic -net user -soundhw >>> es1370 -m 750 -smp 2 win.qcow >>> >> >> Is this under guest or host load? Or just moving the mouse around? >> >> Is the host swapping by any chance? > > I've noticed that issue on guest load, no swapping. > But even just moving the mouse around feels more laggy then under vmware. > I've tried mine with just 1 guest cpu. I've noticed what I believe to be the same bug: when moving the mouse around the vnc viewer, the guest does not seem to follow the same acceleration and I end up with 2 pointers completely out of sync. This makes it really hard to use the mouse (especially as the real pointer often moves off-screen before you reach the part of the guest screen that you need..) I normally would not care about mouse and UI (I run most guests in no-graphic mode), but I have to run some tests against "that-other-OS" at the moment, and this makes it even more of a nightmare. Any advice would be much appreciated. I have tried various VNC clients (no effect), looked for mouse options, etc.. Thanks Antoine -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEAREKAAYFAkli+XkACgkQGK2zHPGK1rucZQCfcqAYZxEjRDUJU+If1AQkIXdD T+IAniL0CNXWJbrF1Okfm9It8Sj2RC9W =9yrd -----END PGP SIGNATURE-----