From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:60202) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ePpfR-0001fa-BO for qemu-devel@nongnu.org; Fri, 15 Dec 2017 08:04:46 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ePpfL-0000VY-9S for qemu-devel@nongnu.org; Fri, 15 Dec 2017 08:04:45 -0500 Received: from mx1.redhat.com ([209.132.183.28]:56936) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ePpfL-0000UL-3M for qemu-devel@nongnu.org; Fri, 15 Dec 2017 08:04:39 -0500 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 496F5C01CB9B for ; Fri, 15 Dec 2017 13:04:38 +0000 (UTC) Date: Fri, 15 Dec 2017 13:04:14 +0000 From: "Dr. David Alan Gilbert" Message-ID: <20171215130414.GB14126@work-vm> References: <20171212202040.GA2458@work-vm> <20171215122519.ov4alinnlqrlvio7@sirius.home.kraxel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20171215122519.ov4alinnlqrlvio7@sirius.home.kraxel.org> Subject: Re: [Qemu-devel] No uhd (3840x2160) guest res? List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gerd Hoffmann Cc: qemu-devel@nongnu.org * Gerd Hoffmann (kraxel@redhat.com) wrote: > On Tue, Dec 12, 2017 at 08:20:41PM +0000, Dr. David Alan Gilbert wrote: > > My guests don't seem to offer the standard uhd resolution of 3840x2160 > > - what should be providing that? > > > > I'm running an f27 gnome (X or wayland) guest with: > > > > ./x86_64-softmmu/qemu-system-x86_64 -device virtio-vga --enable-kvm -m 2G /home/vmimages/fedora27.qcow2 > > > > and the guest lists: > > 4096x2160 > > 2480x1680 > > 2560x1600 > > 1920x1440 > > 1856x1392 > > 1792x1344 > > 2048x1152 > > 1920x1200 > > 1920x1080 > > (and smaller) > > > > given that it can offer 4096x2160, I assume it's not running out of RAM. > > > > I couldn't find anywhere with those higher resolutions listed > > in seabios to consider changing. > > linux kernel has a list of standard vesa resolutions in drm somewhere, > iirc all virt drm drivers just use that for the mode list. I see drivers/video/fbdev/core/modedb.c, but there are modes that I see in the guest that aren't in there; e.g. I see a 4096x2160 listed in the guest (the 2480x1680 seems to have gone?!). I don't see it in SeaBIOS either. Looking at the VESA CVT 1.2 standard I don't see a UHD def (it's got some that are similar but not quite the right res). (I do see a UHD mode defined in qxl, but qxl is unusable and qemu aborts with newer guest kernels). Dave > > > > Dave > > > > -- > > Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK