ACPI hangs with kernel 2.6.8-mm on HP Pavilion ze4400 laptop
Recently I have been running Gentoo linux with the 2.6.6-mm kernel on my laptop, an HP Pavilion ze4400. It worked great.
I tried to boot into some liveCDs (Gentoo and Knoppix) that use the 2.6 kernel a few days ago, and found that they would hang without ACPI=off. That isn't my problem, but it should have been a warning to me.
The problem is that I foolishly upgraded to kernel 2.6.8-mm. Now, I have two major symptoms: if I try to specify a VGA mode in lilo (and I have ACPI enabled) my laptop hangs at a blank screen. The kernel messages never come up at all.
Hopefully the VGA thing is an unrelated problem, because if set vga=NORMAL then I can see that it boots the kernel up to this line:
ACPI: Subsystem revision 20040715
Sometimes, another message will appear:
spurious 8259A interrupt: IRQ7
At that point, the system hangs. It hangs badly; not even the keyboard lights will respond.
If I pass ACPI=off to the kernel, it works. But then I don't have ACPI, and my laptop catches fire.
I have googled extensively for this problem, and many people (with other laptops) seem to be experiencing similar troubles. But I tried their solutions: noapic, pci=noapci, and so on. No luck. I tried rebuilding the kernel (from my 2.4 setup) without cpufreq. Still no luck. Does anyone know what causes this problem?
Last edited by jsmarie; 09-23-2004 at 11:39 PM.