Comment 3 for bug 991391

Exactly the same problem on my computer since I installed ubuntu 12.04.

System information report, generated by Sysinfo: 12/05/2012 02:04:34
http://sourceforge.net/projects/gsysinfo

SYSTEM INFORMATION
 Running Ubuntu Linux, the Ubuntu 12.04 (precise) release.
 GNOME: unknown (unknown)
 Kernel version: 3.3.5-030305-generic (#201205071254 SMP Mon May 7 16:56:02 UTC 2012)
 GCC: 4.6 (x86_64-linux-gnu)
 Xorg: 1.11.3 (20 April 2012 05:12:02AM) (20 April 2012 05:12:02AM)

CPU INFORMATION
 GenuineIntel, Intel(R) Core(TM) i7-2670QM CPU @ 2.20GHz
 Number of CPUs: 8
 CPU clock currently at 800.000 MHz with 6144 KB cache
 Numbering: family(6) model(42) stepping(7)
 Bogomips: 4390.17
 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 rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer xsave avx lahf_lm ida arat epb xsaveopt pln pts dts tpr_shadow vnmi flexpriority ept vpid

MEMORY INFORMATION
 Total memory: 7763 MB
 Total swap: 9998 MB

STORAGE INFORMATION
 SCSI device - scsi0
  Vendor: ATA
  Model: ST9750420AS
 SCSI device - scsi2
  Vendor: HL-DT-ST
  Model: DVDRAM GT51N

HARDWARE INFORMATION
MOTHERBOARD
 Host bridge
  Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
  Subsystem: ASUSTeK Computer Inc. Device 1147
 PCI bridge(s)
  Intel Corporation Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port (rev 09) (prog-if 00 [Normal decode])
  Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5) (prog-if 00 [Normal decode])
  Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 2 (rev b5) (prog-if 00 [Normal decode])
  Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 4 (rev b5) (prog-if 00 [Normal decode])
  Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 6 (rev b5) (prog-if 00 [Normal decode])
  Intel Corporation Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port (rev 09) (prog-if 00 [Normal decode])
  Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5) (prog-if 00 [Normal decode])
  Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 2 (rev b5) (prog-if 00 [Normal decode])
  Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 4 (rev b5) (prog-if 00 [Normal decode])
  Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 6 (rev b5) (prog-if 00 [Normal decode])
 ISA bridge
  Intel Corporation HM65 Express Chipset Family LPC Controller (rev 05)
  Subsystem: ASUSTeK Computer Inc. Device 1147

GRAPHIC CARD
 VGA controller
  NVIDIA Corporation Device 1058 (rev ff) (prog-if ff)
  Subsystem: ASUSTeK Computer Inc. Device 1652

SOUND CARD
 Multimedia controller
  Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05)
  Subsystem: ASUSTeK Computer Inc. Device 1b43

NETWORK
 Network controller
  Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01)
  Subsystem: AzureWave AW-NB037H 802.11bgn Wireless Half-size Mini PCIe Card [AR9002WB-1NGCD]
 Ethernet controller
  Atheros Communications Inc. AR8151 v2.0 Gigabit Ethernet (rev c0)
  Subsystem: ASUSTeK Computer Inc. Device 1851