Ubuntu
linux package

  1. Bug #54621
  2. Comment #7

Comment 7 for bug 54621

Revision history for this message
Allison Karlitskaya (desrt) wrote :

The problem is caused by SMIs being thrown while the kernel is trying to calibrate the delay loop.

This is ICH7. If I save the value of the SMI register then disable SMI_EN before running the calibration then it succeeds.

You have to restore the value of the SMI register after you're done calibrating. There are a few bits in that register like "Enables legacy USB circuit to cause SMI#." that cause USB problems later on if not reenabled (really really slow device detection and keyboard is laggy and each letter you type appears twice).