matt at v8zman.com
Tue Jun 14 23:08:09 UTC 2005
Okay, so I will try and disseminate what I have learned in my search of
a stable machine (which I finally have :)).
So the first thing to do is google search for "your motherboard linux
freeze" or "your motherboard linux hang". Do that for your video card,
network card, etc, mixing and matching what items are in the search. You
may well find out that your problem is common and there is a simple
solution like a patch, different kernel to use, or a bios update.
Now the generic troubleshooting guide:
The quick fixes are disabling the apic and local apic. The apic is the
advanced interupt controller which is supposedly an improvement over the
standard interrupt controller which has been with us since the early
days of computers. Unfortunately some just dont work or dont like linux.
If I remember right the loapic (local apic) only applies to
multiprocessor machines, it is just an exension to an apic which
distributes interrupts between the processors. Either way, disable both
of them by passing them as kernel options during boot. The easiest way
to do that is to press ESC at the GRUB screen when it prompts for you to
do so (I think it is ESC). Then edit the default kernel boot line adding
noapic and nolapic to the end. These changes are not permanent, only for
the current boot. To change them permanently you have to add them to the
/boot/grub/menu.lst file options.
Another option to add the the kernel options is acpi=off or noacpi (i
cant remember which, so just do both). This turns off the acpi features
of the kernel. Acpi is used to enumerate the interrupts on the system,
but some bioses just suck and dont work, so turn off the features for
now. This might cause some things to disappear and stop working on
laptops, but its a good test. It will also prevent power saving features
Turn off all the graphics acceleration features in your
/etc/X11/xorg.conf file. That means commenting out the dri, and glx
lines. Also, if binary drivers are available for your graphics card, try
using the open sourced and binary to see which is more stable. An
additional trick for nvidia owners is the agp option. Disabling use of
agp can be helpful (only for binary drivers). Option "NvAGP"
"0". There are items on www.ubuntuguide.org to tell you how to
install/uninstall the binary drivers.
In desperation its time to move to hardware options. Start by turning
all memory timings as slow as possible (BIOS). Remove all but one memory
dimm and try different slots. Remove the sound, network, and scsi cards
looking for one that fixes your problem. Also try moving the cards to
different slots. Maybe also try a different video card. You should run
the memtest boot option (available from the GRUB menu at bootup).
The very very final changes are the power supply, cpu cooler, and
motherboard. Poor power supplies can have surprising repurcussions on
If none of that works, perhaps you should go back to winows, hehehe. I'm
gonna get flamed for that comment!
Charles Malespin wrote:
>On Tue, 2005-06-14 at 15:17 -0400, Matt Patterson wrote:
>>Generally hard freezes are hardware issues related to interrupt
>>problems. So I would look into disabling devices like network and sound
>>and see if the problem continues. Also, of course try the acpi=off,
>>noapic, nolapic options for the kernel.
>Hi Matt, I am having this problem as well, I am using the ATI X300 video
>card fyi. I am still very much a noob in linux and ubuntu so could you
>please describe what turning acpi=off and noapic will do, and perhaps
>how to do it? The freezes happen sometimes after 30 min of a fresh
>boot, maybe 20 hours. No pattern or real cause and I have NO idea where
>to troubleshoot or look for solutions. Thanks!
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