voilà quelques réponses données lorsque je lance les commandes suivantes
#cat /var/log/boot.log | grep FAILED
#
#cat /var/log/boot.log | grep DEPEND
# [[1;33mDEPEND[0m] Dependency failed for pNFS block layout mapping daemon.
#lspci
00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port (rev 09)
00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 04)
00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b4)
00:1c.4 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 5 (rev b4)
00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation H61 Express Chipset Family LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset Family SATA AHCI Controller (rev 04)
00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 04)
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Cedar [Radeon HD 5000/6000/7350/8350 Series]
01:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Cedar HDMI Audio [Radeon HD 5400/6300 Series]
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 06)
# yum list | grep -i xorg
abrt-addon-xorg.x86_64 2.3.0-3.fc21 installed
xorg-x11-drv-evdev.x86_64 2.9.0-3.fc21 installed
xorg-x11-drv-fbdev.x86_64 0.4.3-19.fc21 installed
xorg-x11-drv-intel.x86_64 2.99.916-3.20141117.fc21 @fedora
xorg-x11-drv-modesetting.x86_64 0.9.0-2.fc21 installed
xorg-x11-drv-nouveau.x86_64 1:1.0.11-1.fc21 installed
xorg-x11-drv-openchrome.x86_64 0.3.3-12.fc21 installed
xorg-x11-drv-qxl.x86_64 0.1.2-1.fc21 installed
xorg-x11-drv-synaptics.x86_64 1.8.0-9.fc21 installed
xorg-x11-drv-vesa.x86_64 2.3.2-19.fc21 @fedora
xorg-x11-drv-vmmouse.x86_64 13.0.0-13.fc21 installed
xorg-x11-drv-vmware.x86_64 13.0.2-5.20140613git82c9b0c.fc21
xorg-x11-drv-wacom.x86_64 0.25.0-2.fc21 installed
xorg-x11-font-utils.x86_64 1:7.5-25.fc21 installed
xorg-x11-fonts-Type1.noarch 7.5-14.fc21 installed
xorg-x11-server-Xorg.x86_64 1.16.2.901-1.fc21 @updates
xorg-x11-server-Xwayland.x86_64 1.16.2.901-1.fc21 @updates
xorg-x11-server-common.x86_64 1.16.2.901-1.fc21 @updates
xorg-x11-server-utils.x86_64 7.7-10.fc21 installed
xorg-x11-utils.x86_64 7.5-16.fc21 installed
xorg-x11-xauth.x86_64 1:1.0.9-2.fc21 installed
xorg-x11-xinit.x86_64 1.3.4-2.fc21 installed
xorg-x11-xkb-utils.x86_64 7.7-12.fc21 @updates
xorg-sgml-doctools.noarch 1.11-1.fc21 fedora
xorg-x11-apps.x86_64 7.7-12.fc21 fedora
xorg-x11-docs.noarch 1.7-1.fc21 fedora
xorg-x11-drivers.x86_64 7.7-12.fc21 fedora
xorg-x11-drv-ati.x86_64 7.5.0-1.fc21 fedora
xorg-x11-drv-dummy.x86_64 0.3.6-20.fc21 fedora
xorg-x11-drv-evdev-devel.i686 2.9.0-3.fc21 fedora
xorg-x11-drv-evdev-devel.x86_64 2.9.0-3.fc21 fedora
xorg-x11-drv-intel.i686 2.99.916-3.20141117.fc21 fedora
xorg-x11-drv-intel-devel.i686 2.99.916-3.20141117.fc21 fedora
xorg-x11-drv-intel-devel.x86_64 2.99.916-3.20141117.fc21 fedora
xorg-x11-drv-ivtv.x86_64 1.2.0-0.15.fc21 fedora
xorg-x11-drv-libinput.x86_64 0.1.2-3.fc21 fedora
xorg-x11-drv-openchrome.i686 0.3.3-12.fc21 fedora
xorg-x11-drv-openchrome-devel.i686 0.3.3-12.fc21 fedora
xorg-x11-drv-openchrome-devel.x86_64 0.3.3-12.fc21 fedora
xorg-x11-drv-sisusb.x86_64 0.9.6-18.fc21 fedora
xorg-x11-drv-synaptics-devel.i686 1.8.0-9.fc21 fedora
xorg-x11-drv-synaptics-devel.x86_64 1.8.0-9.fc21 fedora
xorg-x11-drv-v4l.x86_64 0.2.0-41.fc21 fedora
xorg-x11-drv-void.x86_64 1.4.0-27.fc21 fedora
xorg-x11-drv-voodoo.x86_64 1.2.5-18.fc21 fedora
xorg-x11-drv-wacom-devel.i686 0.25.0-2.fc21 fedora
xorg-x11-drv-wacom-devel.x86_64 0.25.0-2.fc21 fedora
xorg-x11-fonts-100dpi.noarch 7.5-14.fc21 fedora
xorg-x11-fonts-75dpi.noarch 7.5-14.fc21 fedora
xorg-x11-fonts-ISO8859-1-100dpi.noarch 7.5-14.fc21 fedora
xorg-x11-fonts-ISO8859-1-75dpi.noarch 7.5-14.fc21 fedora
xorg-x11-fonts-ISO8859-14-100dpi.noarch 7.5-14.fc21 fedora
xorg-x11-fonts-ISO8859-14-75dpi.noarch 7.5-14.fc21 fedora
xorg-x11-fonts-ISO8859-15-100dpi.noarch 7.5-14.fc21 fedora
xorg-x11-fonts-ISO8859-15-75dpi.noarch 7.5-14.fc21 fedora
xorg-x11-fonts-ISO8859-2-100dpi.noarch 7.5-14.fc21 fedora
xorg-x11-fonts-ISO8859-2-75dpi.noarch 7.5-14.fc21 fedora
xorg-x11-fonts-ISO8859-9-100dpi.noarch 7.5-14.fc21 fedora
xorg-x11-fonts-ISO8859-9-75dpi.noarch 7.5-14.fc21 fedora
xorg-x11-fonts-cyrillic.noarch 7.5-14.fc21 fedora
xorg-x11-fonts-ethiopic.noarch 7.5-14.fc21 fedora
xorg-x11-fonts-misc.noarch 7.5-14.fc21 fedora
xorg-x11-glamor.i686 0.6.0-3.20140419gita4fbc77.fc21
xorg-x11-glamor.x86_64 0.6.0-3.20140419gita4fbc77.fc21
xorg-x11-glamor-devel.i686 0.6.0-3.20140419gita4fbc77.fc21
xorg-x11-glamor-devel.x86_64 0.6.0-3.20140419gita4fbc77.fc21
xorg-x11-proto-devel.noarch 7.7-12.fc21 fedora
xorg-x11-resutils.x86_64 7.5-11.fc21 fedora
xorg-x11-server-Xdmx.x86_64 1.16.2.901-1.fc21 updates
xorg-x11-server-Xephyr.x86_64 1.16.2.901-1.fc21 updates
xorg-x11-server-Xnest.x86_64 1.16.2.901-1.fc21 updates
xorg-x11-server-Xspice.x86_64 0.1.2-1.fc21 fedora
xorg-x11-server-Xvfb.x86_64 1.16.2.901-1.fc21 updates
xorg-x11-server-devel.i686 1.16.2.901-1.fc21 updates
xorg-x11-server-devel.x86_64 1.16.2.901-1.fc21 updates
xorg-x11-server-source.noarch 1.16.2.901-1.fc21 updates
xorg-x11-twm.x86_64 1:1.0.8-2.fc21 fedora
xorg-x11-util-macros.noarch 1.19.0-3.fc21 fedora
xorg-x11-xbitmaps.noarch 1.1.1-7.fc21 fedora
xorg-x11-xdm.x86_64 1:1.1.11-8.fc21 fedora
xorg-x11-xfs.x86_64 1:1.1.4-2.fc21 updates
xorg-x11-xfs-utils.x86_64 1:1.1.4-2.fc21 updates
xorg-x11-xfwp.x86_64 1.0.2-7.fc21 fedora
xorg-x11-xinit-session.x86_64 1.3.4-2.fc21 fedora
xorg-x11-xkb-extras.x86_64 7.7-12.fc21 updates
xorg-x11-xkb-utils-devel.i686 7.7-12.fc21 updates
xorg-x11-xkb-utils-devel.x86_64 7.7-12.fc21 updates
xorg-x11-xsm.x86_64 1.0.2-24.fc21 fedora
xorg-x11-xtrans-devel.noarch 1.3.5-1.fc21 fedora
je ne sais pas si ça peut servir à quelque chose
comment faire pour réinstaller l'interface graphique à partir des paquets de base ?
merci