On Jan 2, 2005, at 5:58 AM, Alexander Holst wrote:

Here a snippet from dmesg:

GMT Delta read from XPRAM: 120 minutes, DST: on
via_calibrate_decr: ticks per jiffy = 63509 (381058 ticks)
Warning: real time clock seems stuck!

^^^ Bingo! ^^^

Console: colour dummy device 80x25
Calibrating delay loop... 202.75 BogoMIPS

This is the corresponding part of dmesg from my beige G3:

GMT Delta read from XPRAM: 120 minutes, DST: on
via_calibrate_decr: ticks per jiffy = 167079 (1002477 ticks)
Console: colour dummy device 80x25
Calibrating delay loop... 466.94 BogoMIPS



If I understand it correctly, Bogomips is some function of the number of times the system executes through a simple loop between interrupts from the real-time clock.

It seems likely that the real-time clock chip -- which is very likely on the I/O board -- is broken. If it is delivering interrupts at a random rate, or not at all, that would explain what you are seeing. Thus the problem went away when you replaced the I/O board.

Depending on how brave you are feeling today, and whether you have some way of identifying the real-time clock chip, you might try replacing it with the good one from the "rev-A" I/O board.

Enjoy!

Rick

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