From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konrad Rzeszutek Wilk Subject: Re: 2.6.38-rc7/rc8 no output on VGA under xen Date: Wed, 16 Mar 2011 10:01:10 -0400 Message-ID: <20110316140110.GD4881@dumpdata.com> References: <4D7E22AA.8020306@leuphana.de> <4D7F9D20.6010105@leuphana.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <4D7F9D20.6010105@leuphana.de> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Andreas Olsowski Cc: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org On Tue, Mar 15, 2011 at 06:08:48PM +0100, Andreas Olsowski wrote: > After another day of testing i have not managed to get this working. > I even tried totally different hardware, the console stays dark. And what is the lspci off the different hardware? What is the diff between the original hardware and this hardware? > The blinking cursor i only get when i am starting with serial console. And you did follow the PVOPS Wiki on troubleshooting and using "console=hvc0 debug" > > So output is possible, its just not done. > > Is 2.6.38 somehow incompatible with the hypervisor? No. The issue is (and I explained this to you on irc) is that the video driver you have is an PCI/AGP type. The patchset to make the 2.6.38 (devel/agp.pci-api) haven't been up-ported to the 2.6.38 tree. In essence the code to make this work is not there. The 2.6.32 has this code. > > Today on irc someone said he had the same problem with 2.6.37. Uhh.. yeah that is expected. There are no patches in the 2.6.37 tree to make it work. > > Please tell me if you are experiencing the same problems or if you > dont, please send me a link to your kernel .config. You got three options: - Stick in a PCI-e discrete graphic card. Say Radeon el-cheapo. See how that works. - Make sure to disable the MGA driver from the kernel and only use the VESA/VGA framebuffer. That _should_ be working. If it is is not please send an e-mail here. - Back-port yourself the #devel/agp.pci-api in the 2.6.38 kernel. There is going to be a compile fallout somewhere in the drivers/gpu/drm/intel, but you could patch that over by just passing a NULL pointer. My .config is basically using the Ubuntu 11.04 config will XEN_ options turned into =y. But that won't help you in this case.