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[HamilJF <john@xxxxxxxxxxxxxxx>]

Thanks for this additional input.

Rather than reload the mobo bios, I rebuilt my machine (about three
weeks ago) using a new mobo, cpu, etc, etc: after all the old one was
old(ish).  So I cannot comment on whether a bios upgrade would have
cured the problem, sorry.

For what it's worth the new config seems fine and here is stuff from
current sysinfo:

SYSTEM INFORMATION
	Running Ubuntu Linux, the Ubuntu 13.04 (raring) release.
	GNOME: 3.6.3 (Ubuntu 2013-03-18)
	Kernel version: 3.8.0-32-generic (#47-Ubuntu SMP Tue Oct 1 22:35:23 UTC 2013)
	GCC: 4.7 (x86_64-linux-gnu)
	Xorg: 1.13.3 (16 October 2013  04:35:36PM) (16 October 2013  04:35:36PM)
	Uptime: 4 days 3 h 58 min
CPU INFORMATION
	GenuineIntel, Intel(R) Core(TM) i5-4430 CPU @ 3.00GHz
	Number of CPUs: 4
	CPU clock currently at 800.000 MHz with 6144 KB cache
	Numbering: family(6) model(60) stepping(3)
	Bogomips: 5985.82
	Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm ida arat xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid
MEMORY INFORMATION
	Total memory: 7873 MB
	Total swap: 30576 MB
HARDWARE INFORMATION
MOTHERBOARD
	Host bridge
		Intel Corporation Haswell DRAM Controller (rev 06)
		Subsystem: Gigabyte Technology Co., Ltd Device 5000
	PCI bridge(s)
		Intel Corporation Lynx Point PCI Express Root Port #1 (rev d5) (prog-if 00 [Normal decode])
		Intel Corporation Lynx Point PCI Express Root Port #3 (rev d5) (prog-if 00 [Normal decode])
		Intel Corporation 82801 PCI Bridge (rev d5) (prog-if 01 [Subtractive decode])
		Intel Corporation 82801 PCI Bridge (rev 41) (prog-if 01 [Subtractive decode])
		Intel Corporation Lynx Point PCI Express Root Port #1 (rev d5) (prog-if 00 [Normal decode])
		Intel Corporation Lynx Point PCI Express Root Port #3 (rev d5) (prog-if 00 [Normal decode])
		Intel Corporation 82801 PCI Bridge (rev d5) (prog-if 01 [Subtractive decode])
		Intel Corporation 82801 PCI Bridge (rev 41) (prog-if 01 [Subtractive decode])
	ISA bridge
		Intel Corporation Lynx Point LPC Controller (rev 05)
		Subsystem: Gigabyte Technology Co., Ltd Device 5001
GRAPHIC CARD
	VGA controller
		Intel Corporation Haswell Integrated Graphics Controller (rev 06) (prog-if 00 [VGA controller])
		Subsystem: Gigabyte Technology Co., Ltd Device d000
SOUND CARD
	Multimedia controller
		Intel Corporation Lynx Point High Definition Audio Controller (rev 05)
		Subsystem: Gigabyte Technology Co., Ltd Device a002
NETWORK
	Ethernet controller
		Realtek Semiconductor Co., Ltd. RTL8111/8168 PCI Express Gigabit Ethernet controller (rev 06)
		Subsystem: Gigabyte Technology Co., Ltd Motherboard

-- 
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Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1229288

Title:
  13.04 unity displays heashed output

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  At some as yet undetermined user input, my screen 'hashes'...
  individual pixel lines become displaced by a few on a cyclic basis, so
  that the display becomes illegible.  Note that this is an AMD64
  machine with Nvidia graphics.  I also experienced a problem a few days
  ago with some windows appearing completely black, but only when 'on
  top': the problems may be related. These problems have only appeared
  with Unity under Ringtail.  None occurred with Gnome.

  ---
  ApportVersion: 2.9.2-0ubuntu8.3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  hamiljf    2539 F.... pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  DistroRelease: Ubuntu 13.04
  HibernationDevice: RESUME=UUID=28977afe-eff5-43ee-99ae-6219aa81ca15
  InstallationDate: Installed on 2011-11-26 (668 days ago)
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  IwConfig:
   eth0      no wireless extensions.

   lo        no wireless extensions.
  MachineType: Gigabyte Technology Co., Ltd. M61PME-S2
  MarkForUpload: True
  NonfreeKernelModules: nvidia
  Package: linux (not installed)
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-30-generic root=UUID=1e93934d-cb35-4bcc-b09d-eb95b1cb9eff ro vga=773 quiet splash
  ProcVersionSignature: Ubuntu 3.8.0-30.44-generic 3.8.13.6
  RelatedPackageVersions:
   linux-restricted-modules-3.8.0-30-generic N/A
   linux-backports-modules-3.8.0-30-generic  N/A
   linux-firmware                            1.106
  RfKill:

  Tags:  raring
  Uname: Linux 3.8.0-30-generic x86_64
  UpgradeStatus: Upgraded to raring on 2013-07-19 (67 days ago)
  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
  WifiSyslog:

  dmi.bios.date: 03/07/2008
  dmi.bios.vendor: Award Software International, Inc.
  dmi.bios.version: F2
  dmi.board.name: M61PME-S2
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.board.version: x.x
  dmi.chassis.type: 3
  dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
  dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF2:bd03/07/2008:svnGigabyteTechnologyCo.,Ltd.:pnM61PME-S2:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnM61PME-S2:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
  dmi.product.name: M61PME-S2
  dmi.sys.vendor: Gigabyte Technology Co., Ltd.

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