Just had a complet system crash, had to reboot with power buton.

Question

Dear all,
Some days ago I had a random Xorg crash while I was reading my emails. It happend just once, I though it was nothing. A few minutes ago, monitor went black, sound stopped, num lock light freezed (pressing the button didnt turned it off), alt+printscr+{b,o} did nothing.
How can I discover what caused this?
I also see some problems with how the image in monitor is showed, here one example of the botton of the page "create new topic" in this forum:
Some windows appears with repetitions when resized (I use awesome window manager). But I do not know if this is related to the crash problem.
Some logs:
$ uname -a
Linux mithrandir 3.7.3-1-ARCH #1 SMP PREEMPT Thu Jan 17 18:52:30 CET 2013 x86_64 GNU/Linux
$ lspci
00:00.0 Host bridge: Advanced Micro Devices [AMD] RS880 Host Bridge
00:02.0 PCI bridge: Advanced Micro Devices [AMD] RS780 PCI to PCI bridge (ext gfx port 0)
00:09.0 PCI bridge: Advanced Micro Devices [AMD] RS780/RS880 PCI to PCI bridge (PCIE port 4)
00:0a.0 PCI bridge: Advanced Micro Devices [AMD] RS780/RS880 PCI to PCI bridge (PCIE port 5)
00:11.0 SATA controller: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 SATA Controller [AHCI mode] (rev 40)
00:12.0 USB controller: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
00:12.2 USB controller: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 USB EHCI Controller
00:13.0 USB controller: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
00:13.2 USB controller: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 USB EHCI Controller
00:14.0 SMBus: Advanced Micro Devices [AMD] nee ATI SBx00 SMBus Controller (rev 42)
00:14.2 Audio device: Advanced Micro Devices [AMD] nee ATI SBx00 Azalia (Intel HDA) (rev 40)
00:14.3 ISA bridge: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 LPC host controller (rev 40)
00:14.4 PCI bridge: Advanced Micro Devices [AMD] nee ATI SBx00 PCI to PCI Bridge (rev 40)
00:14.5 USB controller: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 USB OHCI2 Controller
00:15.0 PCI bridge: Advanced Micro Devices [AMD] nee ATI SB700/SB800/SB900 PCI to PCI bridge (PCIE port 0)
00:15.1 PCI bridge: Advanced Micro Devices [AMD] nee ATI SB700/SB800/SB900 PCI to PCI bridge (PCIE port 1)
00:16.0 USB controller: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
00:16.2 USB controller: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 USB EHCI Controller
00:18.0 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor HyperTransport Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor Miscellaneous Control
00:18.4 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor Link Control
01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Redwood [Radeon HD 5670]
01:00.1 Audio device: Advanced Micro Devices [AMD] nee ATI Redwood HDMI Audio [Radeon HD 5000 Series]
02:00.0 FireWire (IEEE 1394): VIA Technologies, Inc. VT6315 Series Firewire Controller
02:00.1 IDE interface: VIA Technologies, Inc. VT6415 PATA IDE Host Controller (rev a0)
03:00.0 USB controller: NEC Corporation uPD720200 USB 3.0 Host Controller (rev 03)
06:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06)
dmesg output: http://pastebin.com/ay4Lh7be
/var/log/errors.log: http://pastebin.com/rfQ8FCCf
/var/log/Xorg.0.log: http://pastebin.com/zQZckiub
I dont know if this logs are enought. Can someone help me?
Is this a hardware problem??

Answer 1

Using a vacuum cleaner around a computer is extremely bad advice.  Vacuum cleaners build up static on them as part of their normal use.  If you happen to make contact with a part of your computer and the vacuum that will discharge the static.  Any static discharge has the potential to fry your computer components - they are very fragile chips when it comes to electricity.  Do not use a vacuum on your computer.  Compressed air cans are what you should be using however the entire line of thought that it may be dust build up causing a poor connection is suspect itself.  You can make sure that the components inside your computer are well seated in their slots if you wish to explore that possibility.  The suggestion of switching to the open-source driver is most likely to provide quality feedback.  Be sure to read:
https://wiki.archlinux.org/index.php/Ati
The open-source driver page.