Comment 77 for bug 256767

might be a regression.

same issue for me on a HP dv2000.

$ lspci
00:00.0 RAM memory: nVidia Corporation MCP67 Memory Controller (rev a2)
00:01.0 ISA bridge: nVidia Corporation MCP67 ISA Bridge (rev a2)
00:01.1 SMBus: nVidia Corporation MCP67 SMBus (rev a2)
00:01.2 RAM memory: nVidia Corporation MCP67 Memory Controller (rev a2)
00:01.3 Co-processor: nVidia Corporation MCP67 Co-processor (rev a2)
00:02.0 USB Controller: nVidia Corporation MCP67 OHCI USB 1.1 Controller (rev a2)
00:02.1 USB Controller: nVidia Corporation MCP67 EHCI USB 2.0 Controller (rev a2)
00:04.0 USB Controller: nVidia Corporation MCP67 OHCI USB 1.1 Controller (rev a2)
00:04.1 USB Controller: nVidia Corporation MCP67 EHCI USB 2.0 Controller (rev a2)
00:06.0 IDE interface: nVidia Corporation MCP67 IDE Controller (rev a1)
00:07.0 Audio device: nVidia Corporation MCP67 High Definition Audio (rev a1)
00:08.0 PCI bridge: nVidia Corporation MCP67 PCI Bridge (rev a2)
00:09.0 IDE interface: nVidia Corporation MCP67 AHCI Controller (rev a2)
00:0a.0 Ethernet controller: nVidia Corporation MCP67 Ethernet (rev a2)
00:0c.0 PCI bridge: nVidia Corporation MCP67 PCI Express Bridge (rev a2)
00:0d.0 PCI bridge: nVidia Corporation MCP67 PCI Express Bridge (rev a2)

kern.log
May 18 23:46:27 kernel: [ 784.610060] hub 2-0:1.0: unable to enumerate USB device on port 5
May 18 23:46:27 kernel: [ 784.920059] hub 2-0:1.0: unable to enumerate USB device on port 5
May 18 23:46:28 kernel: [ 785.230082] hub 2-0:1.0: unable to enumerate USB device on port 5
May 18 23:46:28 kernel: [ 785.540143] hub 2-0:1.0: unable to enumerate USB device on port 5

NEVER ENDING

also on syslog

Ctrl+Alt+F1 tty UNUSABLE and produces the same error message repeatedly by line.

i remembered i tried the last or one of the last kernel versions (2.6.35.????) for ubuntu 10.10 on an 11.04 upgrade, and these messages didnt appear after grub boot (removed 'quiet splash' from grub to see)

however there were some errors on starting some default applications. and a bit of a slow startup.

so now i've updated the bios and did a clean ubuntu reinstall, but to no avail. faster startup but error message still appears. Trying both the amd64 standard and alternate installers. I might try the i386 32 bit one next. but since this is 64 bit capable system with 4gb of mem, the 64 bit one seems the better choice.

aside from error messages things seem to work normally.

this report below might be related: (same error, same nvidia mcp67 controller)
https://lists.linux-foundation.org/pipermail/bugme-new/2010-November/025981.html

also to note that alternate install seems to get some updates from internet during installation. so am not sure if default install of ubuntu without internet would produce the error.

also saw this error on a recent Clonezilla on the same computer, rendering clonezilla unusable. but using an older i386 (or ?686) CD works without the error.