Re: Hang after soft reboot.

[northern snowfall]

Hi,

Hello

On a fresh, clean install of 4.7-RELEASE my (old) machine consistently
hangs while booting after soft reboot. Powering down and back up again, or
pressing the reset button will boot the machine, but if it is rebooted by
the OS then it hangs after detecting the isa bus "isa0: <ISA bus> on
motherboard".

This is usually a manifestation of old power interfaces (or lack there-of) mingling with
devices that need to be told when to assert a RESET via power management. For example,
I have a hurd of Compaq Deskpro that all use the old VIA 586 power controller. Because
no OS (that I know of ... except for maybe win*?) has a driver for this chip, I get the same
hang you talk about on a warm boot. Since the chipset isn't thunked properly, it doesn't
let the ATA know to RESET. This can be a problem when probing the disk for information,
but, normally doesn't affect loading the boot sector or the first couple of cylinders. I forget
the restriction atm... Anyways, thats most likely your culprit.

This is a normal boot up, with the hang point indicated:
<hangs here on soft reboot>
ata0 at port 0x1f0-0x1f7,0x3f6 irq 14 on isa0
ata1 at port 0x170-0x177,0x376 irq 15 on isa0

Solution? Never warm boot.
Don
P.S. if you keep warm booting you might corrupt the ATA



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