This is a known issue, this bug is meant for tracking getting this fixed for F15, for F14 the vesa driver will be used for revision 01 devices, see bug 641991 .
xorg-x11-drv-qxl-0.0.21-3.fc15,xorg-x11-server-1.10.1-11.fc15 has been submitted as an update for Fedora 15. https://admin.fedoraproject.org/updates/xorg-x11-drv-qxl-0.0.21-3.fc15,xorg-x11-server-1.10.1-11.fc15
Package xorg-x11-drv-qxl-0.0.21-3.fc15, xorg-x11-server-1.10.1-11.fc15: * should fix your issue, * was pushed to the Fedora 15 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing xorg-x11-drv-qxl-0.0.21-3.fc15 xorg-x11-server-1.10.1-11.fc15' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/xorg-x11-drv-qxl-0.0.21-3.fc15,xorg-x11-server-1.10.1-11.fc15 then log in and leave karma (feedback).
xorg-x11-drv-qxl-0.0.21-3.fc14 has been submitted as an update for Fedora 14. https://admin.fedoraproject.org/updates/xorg-x11-drv-qxl-0.0.21-3.fc14
xorg-x11-drv-qxl-0.0.21-3.fc15, xorg-x11-server-1.10.1-11.fc15 has been pushed to the Fedora 15 stable repository. If problems still persist, please make note of it in this bug report.
xorg-x11-drv-qxl-0.0.21-3.fc14 has been pushed to the Fedora 14 stable repository. If problems still persist, please make note of it in this bug report.