From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1DaAec-0003ao-N2 for qemu-devel@nongnu.org; Mon, 23 May 2005 06:59:26 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1DaAeb-0003ac-Oj for qemu-devel@nongnu.org; Mon, 23 May 2005 06:59:26 -0400 Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1DaAco-0002qe-3i for qemu-devel@nongnu.org; Mon, 23 May 2005 06:57:34 -0400 Received: from [62.210.190.9] (helo=brazzaville.magic.fr) by monty-python.gnu.org with esmtp (Exim 4.34) id 1DaAcc-0002Fg-0m for qemu-devel@nongnu.org; Mon, 23 May 2005 06:57:22 -0400 Subject: Re: [Qemu-devel] booting linux 2.6 in qemu-system-ppc From: "J. Mayer" In-Reply-To: <1116808312.20084.14.camel@gaston> References: <1116115668.25230.1.camel@localhost> <1116159184.12010.88.camel@rapid> <1116808312.20084.14.camel@gaston> Content-Type: text/plain Date: Mon, 23 May 2005 12:47:55 +0200 Message-Id: <1116845275.15980.96.camel@rapid> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Johannes Berg On Mon, 2005-05-23 at 10:31 +1000, Benjamin Herrenschmidt wrote: > > console=ttyS0 console=tty0 > > Note that the Open-Firmware frame-buffer support is broken in many 2.6 > > kernels (I mean on real Macs) > > How so ? Well, there have been many issues with frame-buffer in 2.6, not only on Mac platform. With Open-Firmware frame buffer, I remember the first 2.6 kernels had no fb output at all. Then came kernels that could display a Tux penguin in psychadelic colors, I guess it was drawing in 16 bits mode when the OF frame-buffer is 15 bits. This has been solved in more recent kernels. I don't remember in which version it was fixed (but I think around 2.6.5 or 2.6.6). I can easily reproduce this on my Ibook and on my Apple Network Server, which means it's not a hardware-dependant bug (Ibook 2 has an ATI graphic card, ANS is cirrus-logic) nor it's specific to some OF version (ANS one is really old...). There is now another bug with qemu: with recent 2.6 kernels, the frame-buffer is recognized and console is working but it only draws characters black on black background, even if I send escape sequences to change the drawing color. Note that the penguin is well drawn, in those cases. If you have an idea of what can cause this, I'd be glad to know it ;-) [...] -- J. Mayer Never organized