From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Cave-Ayland Subject: VNC framebuffer block artefacts on qemu-kvm-0.12.1.1 Date: Tue, 05 Jan 2010 16:11:26 +0000 Message-ID: <4B4364AE.8080509@siriusit.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit To: kvm@vger.kernel.org Return-path: Received: from ra.siriusit.co.uk ([217.207.197.130]:44883 "EHLO ra.siriusit.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754945Ab0AEQjP (ORCPT ); Tue, 5 Jan 2010 11:39:15 -0500 Received: from [192.168.1.83] (mcavea@[192.168.1.83]) by ra.siriusit.co.uk (8.13.3/8.13.3) with ESMTP id o05GBFuf013019 for ; Tue, 5 Jan 2010 16:11:15 GMT Sender: kvm-owner@vger.kernel.org List-ID: Hi all, Having just upgraded from kvm-85 to qemu-kvm-0.12.1.1 on one of our servers, I've noticed that I am seeing block artefacts when connecting using VNC to the graphical VGA console of a WinXP guest. Looking at the VNC output, what I am seeing is that instead of updating some parts of the screen which require a redraw, they are just being replaced by light grey blocks of around 16x16 pixels. Generally, but not always, several of these blocks appear in a row. Moving the mouse over the relevant sections of the screen causes them to be redrawn correctly. I've tried this using both the cirrus and vga drivers, switching between 16/24/32 bit colour and also different resolutions and unfortunately the effect still remains :( Is there anything else I can do to help try and debug this? Again this is on an x86_64 Debian Lenny host with a 2.6.32.2 kernel on Intel. ATB, Mark. -- Mark Cave-Ayland - Senior Technical Architect PostgreSQL - PostGIS Sirius Corporation plc - control through freedom http://www.siriusit.co.uk t: +44 870 608 0063 Sirius Labs: http://www.siriusit.co.uk/labs