Messages in this thread | | | Date | Fri, 7 Mar 2003 12:16:56 +1000 | From | Menno Smits <> | Subject | Strange power off issues (2.4.20) |
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I'm experiencing some strange power off problems with 2.4.20.
When APM or ACPI is enabled and the shutdown/halt/poweroff command is issued the system will shutdown, power off and then power straight back on again. The power LED turns off and hard disk begins spinning down and then power comes straight back on a split second later.
This problem doesn't occur on the same hardware with 2.2.19 or with Windows 98 (ie. the system shuts down and stays off). The system in question has a MSI-6368v5 motherboard (VIA chipset). Wake-on-LAN, wake-on-serial etc etc are all turned off in the BIOS. APM and ACPI are enabled in the BIOS however.
During my testing I've tried various combinations of APM kernel options including "Enable PM at boot time" and "Use real mode APM BIOS call to power off", with no change in behaviour.
I've seen exactly the same behaviour with an Intel chipset MSI motherboard. Turning off the "Use real mode APM BIOS call to power off" kernel option seemed to fix it for that system. Unfortunately I no longer have access to it to test things further.
Any advice on what might be going on would be greatly appreciated. Extensive googling and experimentation has got me nowhere so far.
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