I have two HP dc7800 convertible minitowers that are exhibiting the following issue: every 5-10 minutes, they will “freeze” for about 30 seconds, and then pick right back up again. During the freeze, it seems that nothing at all happens on the system; the clock doesn’t even advance (it just picks up again with the next second, and that 30-or-so seconds are lost).
I’ve tried both CentOS 5.8 and 5.7, thinking it was a kernel incompatibility, but the problem happened with both versions. I have tried different hard drives, different memory, even swapped the entire machine, and the problem exists everywhere. I have tried adding “pci=nommconf” to the kernel line, as that was reported as being necessary back with 5.2 on these machines, but that made no difference (and shouldn’t be necessary now, anyway, as I believe the issue has either been fixed or worked-around).
I am stuck, and can’t figure out where to even suspect the problem might actually be. There are no errors getting logged anywhere that I can find, probably because everything just “stops” temporarily, so there’s nothing for the system to log.
Does anyone have any idea where I could look to fix this? I think I am next going to go back to 5.2, where the pci=nommconf is necessary, because at least back that far it appears to have been working for other people. However, I really would like to have this running 5.8.