Public bug reported:

My usb keyboard connects to a usb slot in the back of the computer. The
mouse connects to a usb slot on the keyboard.  When I switch the
computer on and try to start Ubuntu it crashes just after grub. The
screen goes black and goes into standby mode and the hard disk light
stays on.

To get the computer to start I can use the following workaround (this is
not a fix for the problem as the crashing still happens after Ubuntu is
loaded, just not at boot time):

1. Go into the Phoenix Bios
2. load failsafe defaults
3. Go into integrated perhiperals->SIS OnChip PCI Device
4. Enable the following:
-SIS USB Controller
-USB 2.0
-USB Legacy
-USB Mouse
-AC '97 Sound 

5 Press F10, save the new settings and restart the computer.

Ubuntu starts up fine when I do that. Except for an error message
saying: "usb 1-1: not accepting addres 2"

However, using this workaround Ubuntu crashes at random times  when in
use. Normally I dont get to use Ubuntu for more than 5 minutes without a
crash.  The crash is exactly the same sort of crash that I was having at
boot time only this time it just happens at random times when Ubuntu is
actually loaded.

** Affects: Ubuntu
     Importance: Undecided
         Status: Unconfirmed

-- 
usb causes crashing at boot time (partial workaround inlcuded)
https://launchpad.net/bugs/78141

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