* Gerd Hoffmann (kra...@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 / dgilb...@redhat.com / Manchester, UK -- Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK
