Thanks for the reply, seablade. Following is what I hope you've asked for - I'm really not quite sure.

I tried using the keystrokes Ctrl+Alt+F. . . but nothing happened - no response at all. Something probably was installed incorrectly, I suppose. Odd, because I used F2 in order to access the screen which shows both Windows and Ubuntu. Is that normal, btw? When I reboot, both systems now show up, fortunately.
/etc/X11/xorg.conf
bash: /etc/X11/xorg.conf: Permission denied
kelly@kelly-desktop:~$
:~$ lspci -v
00:00.0 Host bridge: Intel Corporation 82875P/E7210 Memory Controller Hub (rev 02)
Subsystem: Intel Corporation 82875P/E7210 Memory Controller Hub
Flags: bus master, fast devsel, latency 0
Memory at f8000000 (32-bit, prefetchable) [size=64M]
Capabilities: <access denied>
00:01.0 PCI bridge: Intel Corporation 82875P Processor to AGP Controller (rev 02) (prog-if 00 [Normal decode])
Flags: bus master, 66MHz, fast devsel, latency 32
Bus: primary=00, secondary=01, subordinate=01, sec-latency=32
I/O behind bridge: 00009000-00009fff
Memory behind bridge: ff700000-ff7fffff
Prefetchable memory behind bridge: d6b00000-f6afffff
00:03.0 PCI bridge: Intel Corporation 82875P/E7210 Processor to PCI to CSA Bridge (rev 02) (prog-if 00 [Normal decode])
Flags: bus master, 66MHz, fast devsel, latency 32
Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
I/O behind bridge: 0000a000-0000afff
Memory behind bridge: ff800000-ff8fffff
00:1d.0 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #1 (rev 02) (prog-if 00 [UHCI])
Subsystem: Intel Corporation Unknown device 425a
Flags: bus master, medium devsel, latency 0, IRQ 177
I/O ports at cc00 [size=32]
00:1d.1 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #2 (rev 02) (prog-if 00 [UHCI])
Subsystem: Intel Corporation Unknown device 425a
Flags: bus master, medium devsel, latency 0, IRQ 185
I/O ports at d000 [size=32]
00:1d.2 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #3 (rev 02) (prog-if 00 [UHCI])
Subsystem: Intel Corporation Unknown device 425a
Flags: bus master, medium devsel, latency 0, IRQ 169
I/O ports at d400 [size=32]
00:1d.3 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #4 (rev 02) (prog-if 00 [UHCI])
Subsystem: Intel Corporation Unknown device 425a
Flags: bus master, medium devsel, latency 0, IRQ 177
I/O ports at d800 [size=32]
00:1d.7 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB2 EHCI Controller (rev 02) (prog-if 20 [EHCI])
Subsystem: Intel Corporation Unknown device 425a
Flags: bus master, medium devsel, latency 0, IRQ 193
Memory at ffaffc00 (32-bit, non-prefetchable) [size=1K]
Capabilities: <access denied>
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev c2) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=03, subordinate=03, sec-latency=32
I/O behind bridge: 0000b000-0000bfff
Memory behind bridge: ff900000-ff9fffff
00:1f.0 ISA bridge: Intel Corporation 82801EB/ER (ICH5/ICH5R) LPC Interface Bridge (rev 02)
Flags: bus master, medium devsel, latency 0
00:1f.1 IDE interface: Intel Corporation 82801EB/ER (ICH5/ICH5R) IDE Controller (rev 02) (prog-if 8a [Master SecP PriP])
Subsystem: Intel Corporation Unknown device 425a
Flags: bus master, medium devsel, latency 0, IRQ 169
I/O ports at <unassigned>
I/O ports at <unassigned>
I/O ports at <unassigned>
I/O ports at <unassigned>
I/O ports at ffa0 [size=16]
Memory at 50000000 (32-bit, non-prefetchable) [size=1K]
00:1f.2 IDE interface: Intel Corporation 82801EB (ICH5) SATA Controller (rev 02) (prog-if 8f [Master SecP SecO PriP PriO])
Subsystem: Intel Corporation Unknown device 425a
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 169
I/O ports at ec00 [size=8]
I/O ports at e800 [size=4]
I/O ports at e400 [size=8]
I/O ports at e000 [size=4]
I/O ports at dc00 [size=16]
00:1f.3 SMBus: Intel Corporation 82801EB/ER (ICH5/ICH5R) SMBus Controller (rev 02)
Subsystem: Intel Corporation Unknown device 425a
Flags: medium devsel, IRQ 3
I/O ports at c800 [size=32]
01:00.0 VGA compatible controller: ATI Technologies Inc R480 [Radeon X850Pro] (prog-if 00 [VGA])
Subsystem: ATI Technologies Inc Unknown device 0312
Flags: bus master, 66MHz, medium devsel, latency 32, IRQ 11
Memory at e8000000 (32-bit, prefetchable) [size=128M]
I/O ports at 9800 [size=256]
Memory at ff7f0000 (32-bit, non-prefetchable) [size=64K]
Expansion ROM at ff7c0000 [disabled] [size=128K]
Capabilities: <access denied>
01:00.1 Display controller: ATI Technologies Inc R480 [Radeon X850Pro] (Secondary)
Subsystem: ATI Technologies Inc Unknown device 0313
Flags: bus master, 66MHz, medium devsel, latency 32
Memory at e0000000 (32-bit, prefetchable) [size=128M]
Memory at ff7e0000 (32-bit, non-prefetchable) [size=64K]
Capabilities: <access denied>
02:01.0 Ethernet controller: Intel Corporation 82547EI Gigabit Ethernet Controller (LOM)
Subsystem: Intel Corporation Unknown device 3025
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 169
Memory at ff8e0000 (32-bit, non-prefetchable) [size=128K]
I/O ports at ac00 [size=32]
Capabilities: <access denied>
03:02.0 Multimedia audio controller: Creative Labs SB Audigy (rev 04)
Subsystem: Creative Labs SB Audigy 2 ZS (SB0350)
Flags: bus master, medium devsel, latency 32, IRQ 201
I/O ports at b800 [size=64]
Capabilities: <access denied>
03:02.1 Input device controller: Creative Labs SB Audigy MIDI/Game port (rev 04)
Subsystem: Creative Labs SB Audigy MIDI/Game Port
Flags: bus master, medium devsel, latency 32
I/O ports at bc00 [size=8]
Capabilities: <access denied>
03:02.2 FireWire (IEEE 1394): Creative Labs SB Audigy FireWire Port (rev 04) (prog-if 10 [OHCI])
Subsystem: Creative Labs SB Audigy FireWire Port
Flags: bus master, medium devsel, latency 32, IRQ 169
Memory at ff9ff800 (32-bit, non-prefetchable) [size=2K]
Memory at ff9f8000 (32-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
kelly@kelly-desktop:~$