Attached is a complete dmesg from a bootup of the kernel on the toughbook S10. RE the noapic, I have no idea how I can give more information on it, since the crash almost always occurs during the boot process itself, often very early in the process. I will see if I can resurect the dmesg that gets saved, if any, during that process. It is probably also an earlier kernel. I have not dared try my current kernel with noapic, but perhaps I will try. On Fri, 1 Jun 2012, Bjorn Helgaas wrote: > On Thu, May 31, 2012 at 3:39 PM, Bill Unruh wrote: >> I am running Mageia 2 kernel 3.3.6-desktop586-2.mga2 >> >> Every time I boot up I get the error messages >> pci 0000:00:04.0: BAR 0: error updating (0xdfa00004 != 0xfed98004) > > Thanks very much for this report. I opened this bug report to help me > keep track of it: https://bugzilla.kernel.org/show_bug.cgi?id=43331 > > The message means that we tried to write address 0xdfa00000 to BAR 0 > of device 00:04.0 (a "signal processing controller," whatever that > is), but when we read the BAR back, we read 0xfed98004 instead. > That's an interesting address because it looks a lot like a resource > of an ACPI PNP0c02 device: > > system 00:0e: [mem 0xfed98000-0xfed9ffff] has been reserved > system 00:0e: Plug and Play ACPI device, IDs PNP0c02 (active) > > You say your machine runs OK (with "noapic"), but I'm doubtful that > 00:04.0 is working -- it doesn't even seem to have a driver bound to > it. I don't know what the device does, but if you're not using it, > it's not surprising that you wouldn't notice it being broken. > > Can you attach the complete dmesg log to the bugzilla? It will have > more details about other devices and the ranges from which we allocate > resources for PCI devices. > > You mention that the machine is not reliable unless you use "noapic". > That sounds like a separate bug, but also something it would be good > to track down. > -- William G. Unruh | Canadian Institute for| Tel: +1(604)822-3273 Physics&Astronomy | Advanced Research | Fax: +1(604)822-5324 UBC, Vancouver,BC | Program in Cosmology | unruh@physics.ubc.ca Canada V6T 1Z1 | and Gravity | www.theory.physics.ubc.ca/