GRUB_CMDLINE_LINUX="rd.md=0 rd.dm=0 KEYTABLE=us quiet SYSFONT=latarcyrheb-sun16 rhgb rd.lvm.lv=VolGroup02/LogVol01 rd.lvm.lv=VolGroup01/LogVol01 rd.lvm.lv=VolGroup00/LogVol01 rd.luks=0 LANG=en_US.UTF-8 radeon.modeset=1"Also, before rebooting, I installed catalyst to try out the proprietary ATI driver fglrx:
yum install xorg-x11-drv-catalyst(obtained from rpmfusion-nonfree-updates|testing repo). After rebooting, /sbin/lsmod shows that both fglrx and radeon are running! Both seem to initialize happily according to /var/log/messages. However, /proc/ati/0/name only lists fglrx, so I guess it won. I've now removed the radeon kernel option. In any case, graphics performance is way better now (a clean order of magnitude less CPU usage in pdextended).
Later, I experienced some glitches which settled down after a while. Then, after a reboot, GNOME 3 started up in ``fall back mode,'' which is very slow (no acceleration?). In this case, only the radeon driver was loaded.
Following the advice at http://forums.fedoraforum.org/showthread.php?t=155503, I did this:
rpm -Uvh http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-stable.noarch.rpm http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-stable.noarch.rpm yum install akmod-catalyst xorg-x11-drv-catalyst xorg-x11-drv-catalyst-libsfollowed by a reboot. It's glitchy but at least it works again. However, all my key-equivalents are gone.
More advice from http://forums.fedoraforum.org/showthread.php?t=271971:
# Add the following line in /etc/environment export CLUTTER_VBLANK=none(said to minimize the probability of gnome-shell crashes while displaying tooltip overlays). I have not yet done this, waiting for a problem to appear first.
According to http://www.howtoforge.com/enabling-compiz-on-a-fedora-16-gnome-classic-desktop-nvidia-geforce-8100, it is not possible to use compiz with GNOME 3, but it can be used in classic GNOME mode (aka the ``fallback'' mode). I decided to do without compiz (but I do miss it).
yum install gnome-shell-extensions-alternative-status-menu