Hi, On Mon, Jun 04, 2007 at 12:57:21PM +0200, Antonio Mignolli wrote: > Hi. > The problem reported below has not been solved, > I tried with the last stable kernel 2.6.21.3. > > But it seems not to be an ACPI issue, > I removed ACPI support from the kernel, > and still have the problem. > What else could be?
Have you enabled local APIC ("lapic" command line) since? Enabling local APIC is known to cause just these issues on some machines (HARD lockup on AC power/screen dimming/Fn keys change), and I'm currently trying to nail what exactly the problem is. People say it's a broken BIOS (probably one which doesn't contain support for local APIC despite the CPU offering one), but I'm not willing to assume this yet, it may just as well be incomplete APIC IRQ routing setup or so). OTOH I'm not entirely sure whether "lapic" use is fully independent from ACPI support (which you disabled), but I think it is, so my reasoning may be valid. find /sys -name "*lapic*" should reveal whether local APIC is currently active or not and thus whether this might be responsible or not. Andreas Mohr - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/