From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47444) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1X6ahn-00047A-9f for qemu-devel@nongnu.org; Mon, 14 Jul 2014 03:29:53 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1X6ahh-0002UU-5f for qemu-devel@nongnu.org; Mon, 14 Jul 2014 03:29:47 -0400 Received: from gate.crashing.org ([63.228.1.57]:37839) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1X6ahg-0002UB-Rw for qemu-devel@nongnu.org; Mon, 14 Jul 2014 03:29:41 -0400 Message-ID: <1405322943.9343.28.camel@pasglop> From: Benjamin Herrenschmidt Date: Mon, 14 Jul 2014 17:29:03 +1000 In-Reply-To: <53C385BA.4090601@dlhnet.de> References: <1405074278-16230-1-git-send-email-kraxel@redhat.com> <1405074278-16230-4-git-send-email-kraxel@redhat.com> <53C385BA.4090601@dlhnet.de> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PULL 3/3] cirrus: Fix host CPU blits List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Peter Lieven Cc: Gerd Hoffmann , qemu-devel@nongnu.org On Mon, 2014-07-14 at 09:24 +0200, Peter Lieven wrote: > it seems you have digged into the cirrus code recently. Have you an idea how to > fix the issue with the graphics corruption for cirrus vga and recent X Server versions? > > E.g. take an Ubuntu 14.04 Desktop CD, boot it into live mode and open terminal. > > I have tried to debug it a little, but I have no clue how to solve this. I tried to get > hands on a real hardware Cirrus Logic Graphics card and test if this happens there as well, > but I had no chance to get one. I *think* it is a X server side bug. They broke 24bpp packed pixel format. I've seen patches submitted to the Xorg list fairly recently by somebody from canonical. You can test by creating an xorg.conf to force the display to 16bpp instead of 24 and see if that helps. Cheers, Ben.