Comment 18 for bug 576496

I have the same problem (see below) and my computer is up to date. My mouse (USB) and keyboard (PS/2) won't freeze. The problem happens at random, but frequently is triggered by plugin in a usb flash drive. Sometimes when it happens if I have a terminal opened every command returns "Bus error". I can't even shutdown or restart the machine.

"nv_mode_filter" does it have something to do with nvidia chipset. Maybe it is a driver issue?

Do you have virtual box installed? Because I do and this guy had too and fixed a similar problem by uninstalling virtual box:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/231575/comments/51

dmesg:
[ 3504.000025] ata4: lost interrupt (Status 0x50)
[ 3535.000038] ata4: lost interrupt (Status 0x51)
[ 3540.000038] ata4.00: qc timeout (cmd 0xa0)
[ 3540.000050] ata4.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
[ 3540.000055] sr 3:0:0:0: CDB: Test Unit Ready: 00 00 00 00 00 00
[ 3540.000070] ata4.00: cmd a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
[ 3540.000071] res 51/20:03:00:00:00/00:00:00:00:00/a0 Emask 0x5 (timeout)
[ 3540.000075] ata4.00: status: { DRDY ERR }
[ 3540.000101] ata4: soft resetting link
[ 3540.164359] ata4: nv_mode_filter: 0x739f&0x739f->0x739f, BIOS=0x7000 (0xc000) ACPI=0x701f (60:600:0x13)
[ 3540.180297] ata4.00: configured for UDMA/33
[ 3545.180029] ata4.00: qc timeout (cmd 0xa0)
[ 3545.180037] ata4.00: TEST_UNIT_READY failed (err_mask=0x5)
[ 3545.180063] ata4: soft resetting link
[ 3545.344365] ata4: nv_mode_filter: 0x739f&0x739f->0x739f, BIOS=0x7000 (0xc000) ACPI=0x701f (60:600:0x13)
[ 3545.360297] ata4.00: configured for UDMA/33
[ 3550.360037] ata4.00: qc timeout (cmd 0xa0)
[ 3550.360045] ata4.00: TEST_UNIT_READY failed (err_mask=0x5)
[ 3550.360050] ata4.00: limiting speed to UDMA/33:PIO3
[ 3550.360075] ata4: soft resetting link
[ 3550.524380] ata4: nv_mode_filter: 0x738f&0x739f->0x738f, BIOS=0x7000 (0xc000) ACPI=0x701f (60:600:0x13)
[ 3550.540290] ata4.00: configured for UDMA/33
[ 3555.540029] ata4.00: qc timeout (cmd 0xa0)
[ 3555.540036] ata4.00: TEST_UNIT_READY failed (err_mask=0x5)
[ 3555.540040] ata4.00: disabled
[ 3555.540074] ata4: soft resetting link
[ 3555.696079] ata4: EH complete

cat /var/log/debug:
Oct 13 10:22:19 siid00 kernel: [ 3540.164359] ata4: nv_mode_filter: 0x739f&0x739f->0x739f, BIOS=0x7000 (0xc000) ACPI=0x701f (60:600:0x13)
Oct 13 10:22:24 siid00 kernel: [ 3545.344365] ata4: nv_mode_filter: 0x739f&0x739f->0x739f, BIOS=0x7000 (0xc000) ACPI=0x701f (60:600:0x13)
Oct 13 10:22:29 siid00 kernel: [ 3550.524380] ata4: nv_mode_filter: 0x738f&0x739f->0x738f, BIOS=0x7000 (0xc000) ACPI=0x701f (60:600:0x13)

lspci:
lspci
00:00.0 Host bridge: nVidia Corporation Device 0071 (rev a3)
00:00.1 RAM memory: nVidia Corporation Device 007f (rev a1)
00:00.2 RAM memory: nVidia Corporation Device 0075 (rev a1)
00:00.3 RAM memory: nVidia Corporation Device 006f (rev a1)
00:00.4 RAM memory: nVidia Corporation Device 00b4 (rev a1)
00:01.0 RAM memory: nVidia Corporation Device 0076 (rev a1)
00:01.1 RAM memory: nVidia Corporation Device 0078 (rev a1)
00:01.2 RAM memory: nVidia Corporation Device 0079 (rev a1)
00:01.3 RAM memory: nVidia Corporation Device 007a (rev a1)
00:01.4 RAM memory: nVidia Corporation Device 007b (rev a1)
00:01.5 RAM memory: nVidia Corporation Device 007c (rev a1)
00:01.6 RAM memory: nVidia Corporation Device 007d (rev a1)
00:02.0 PCI bridge: nVidia Corporation Device 007e (rev a2)
00:04.0 PCI bridge: nVidia Corporation Device 007e (rev a2)
00:05.0 PCI bridge: nVidia Corporation Device 007e (rev a2)
00:06.0 PCI bridge: nVidia Corporation Device 007e (rev a2)
00:07.0 PCI bridge: nVidia Corporation Device 007e (rev a2)
00:09.0 RAM memory: nVidia Corporation MCP51 Host Bridge (rev a2)
00:0a.0 ISA bridge: nVidia Corporation MCP51 LPC Bridge (rev a2)
00:0a.1 SMBus: nVidia Corporation MCP51 SMBus (rev a2)
00:0a.2 RAM memory: nVidia Corporation MCP51 Memory Controller 0 (rev a2)
00:0b.0 USB Controller: nVidia Corporation MCP51 USB Controller (rev a2)
00:0b.1 USB Controller: nVidia Corporation MCP51 USB Controller (rev a2)
00:0d.0 IDE interface: nVidia Corporation MCP51 IDE (rev a1)
00:0e.0 RAID bus controller: nVidia Corporation MCP51 Serial ATA Controller (rev a1)
00:0f.0 IDE interface: nVidia Corporation MCP51 Serial ATA Controller (rev a1)
00:10.0 PCI bridge: nVidia Corporation MCP51 PCI Bridge (rev a2)
00:10.1 Audio device: nVidia Corporation MCP51 High Definition Audio (rev a2)
01:00.0 VGA compatible controller: nVidia Corporation G92 [GeForce 9800 GT] (rev a2)
06:0c.0 Ethernet controller: Marvell Technology Group Ltd. 88E8001 Gigabit Ethernet Controller (rev 13)

lsusb:
Bus 002 Device 002: ID 046d:c03d Logitech, Inc. M-BT96a Pilot Optical Mouse
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub