Messages in this thread Patch in this message | | | From | Edward Macfarlane Smith <> | Subject | Machine does not shutdown with certain configuration | Date | Sat, 14 Jun 2003 18:26:21 +0100 |
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Since getting my new laptop (Sony PCG-Z1SP, it's a Centrino machine) I had never got it to successfully power off. I had just been using the SuSE kernel and then the same configuration that worked well on a couple of other machines, but I then tried a different configuration and it powered off, after I did a little playing I tracked it down to the "Local APIC support on uniprocessors" option. Turning this off makes the machine poweroff. I have checked this on 2.4.21-rc6-ac1 and 2.4.21-ac1. I just thought other people might find that useful to know. The text on the help for CONFIG_X86_UP_APIC seems to suggest it's fine to use it on any machine (and certainly while running it seems to make no difference), would a patch to the text to indicate it may prevent power off be accepted, or is this problem too specific to this machine to be included? Regards, Edward
e.g.
--- linux-2.4.21_ac1_orig/Documentation/Configure.help 2003-06-14 16:00:30.000000000 +0100 +++ linux/Documentation/Configure.help 2003-06-14 18:04:18.000000000 +0100 @@ -289,6 +289,8 @@ have a local APIC, then the kernel will still run with no slowdown at all. The local APIC supports CPU-generated self-interrupts (timer, performance counters), and the NMI watchdog which detects hard lockups. + On some machines (e.g. Sony Vaio PCG-Z1SP) this option may prevent the + machine from powering off when it is halted.
If you have a system with several CPUs, you do not need to say Y here: the local APIC will be used automatically. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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