Re: Dumb questions to apic
Hi Tomaž, > > LAPIC = Local Advanced Programmable Interrupt Controller > (local refering to a CPU in a SMP system having its own controller) Yes, local, but what does local mean? Is it hardware related or local in the software? > ACPI and APM are system features directly related to power management > (with ACPI replacing APM in recent hardware). They handle battery > charging, putting system in sleep modes, etc. > Ok, this will be controlled by the BIOS, I suppose, and there is no way, to deactivate it ion the BIOS completeley as the kernel has to interact with the BIOS? > "Complete software ACPI independent from hardware" isn't possible. In > the end, you need some cooperation from hardware to trip a switch if you > want the computer to power off after shutdown. > Yes, like I guessed above > APIC and LAPIC are related to power management only in the way that > power management related peripherals can trigger interrupts that are > configured through them. But so does the USB controller, disk drives, etc. > When I add "nolapic" to the kernel , then everything is working fine, but then one of the two cores disappeared. Would be nice, if I could have both cores, you might understand. :) All in all, I can run the notebook (it is no need to put it into trash). It is an Amilo pa 2510, 2x1,7 GHz AMD Dualcore CPU, with 4,6 GB RAM and a 320GB harddrive. I am using it as my kali-machine. And such bugs are also good to learn things. > Best regards > Tomaž Best regards Hans
Re: Dumb questions to apic
On 24. 05. 2017 13:54, to...@tuxteam.de wrote: > I don't know for sure, but this thing from the Inertubes looks similar > (there it is apic, the OP is lapic, but the remaining phenomenology > looks similar. Perhaps a search on "power off apic" turns up more > relevant dirt :) Let me rephrase. In the context of Linux kernel parameters that Hans is talking about, the acronyms refer to these things: APIC = Advanced Programmable Interrupt Controller LAPIC = Local Advanced Programmable Interrupt Controller (local refering to a CPU in a SMP system having its own controller) ACPI = Advanced Configuration and Power Interface APM = Advanced Power Management ACPI and APM are system features directly related to power management (with ACPI replacing APM in recent hardware). They handle battery charging, putting system in sleep modes, etc. "Complete software ACPI independent from hardware" isn't possible. In the end, you need some cooperation from hardware to trip a switch if you want the computer to power off after shutdown. APIC and LAPIC are related to power management only in the way that power management related peripherals can trigger interrupts that are configured through them. But so does the USB controller, disk drives, etc. Best regards Tomaž signature.asc Description: OpenPGP digital signature
Re: Dumb questions to apic
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On Wed, May 24, 2017 at 01:40:56PM +0200, Tomaž Šolc wrote: > On 24. 05. 2017 13:04, Hans wrote: > > "lapic" is local apic, but what is this? > > APIC is Advanced Programmable Interrupt Controller. This is not directly > related to power management. Interrupt controller manages how the > processor receives interrupts from peripherals. It seems unlikely that > it could be related to your problems. Hah. This is Intel architecture. Entropy itself. Nothing is unlikely. I don't know for sure, but this thing from the Inertubes looks similar (there it is apic, the OP is lapic, but the remaining phenomenology looks similar. Perhaps a search on "power off apic" turns up more relevant dirt :) cheers - -- t -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.12 (GNU/Linux) iEYEARECAAYFAlkldH0ACgkQBcgs9XrR2kZjIgCeP9//cX2NPdZ4B27KAel529Tk WagAmgK84i7E0M/4V8Qexm6YpRsdoE+P =QnmO -END PGP SIGNATURE-
Re: Dumb questions to apic
On 24. 05. 2017 13:04, Hans wrote: > "lapic" is local apic, but what is this? APIC is Advanced Programmable Interrupt Controller. This is not directly related to power management. Interrupt controller manages how the processor receives interrupts from peripherals. It seems unlikely that it could be related to your problems. Best regards Tomaž signature.asc Description: OpenPGP digital signature
Dumb questions to apic
Dear list, this is a little bit offtopic. I got a broken notebook as a gift (did not start, no bios screen, nothing!). Now I managed to get it running again. Everything is working, execpt the bios. The bios is broken, and the backup battery is empty in seconds. But that is not the problem, just background info. I can start the notebook, and debian/testing is running fine. But when I want to reboot or shutdown the notebook, it does not switch off. I believe, it is a bios problem. So I tried with several kernel parameters. I tried acpi=force apm=off noacpi But none of them worked. When I tried "nolapic", then I can reboot and shutoff, but then only one cpu is available. As I do not know, where to search, I googled to get information, the meaning of acpi, nolapic and so on. "lapic" is local apic, but what is this? And can I switch completely to a software acpi, so that I am independent from the hardware? Which kernel command is the choice? Hope, someone can make this little point clearer. Best regards Hans
